19 Sep, 2013
1 commit
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Pull vfs fixes from Al Viro:
"atomic_open-related fixes (Miklos' series, with EEXIST-related parts
replaced with fix in fs/namei.c:atomic_open() instead of messing with
the instances) + race fix in autofs + leak on failure exit in 9p"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
9p: don't forget to destroy inode cache if fscache registration fails
atomic_open: take care of EEXIST in no-open case with O_CREAT|O_EXCL in fs/namei.c
vfs: don't set FILE_CREATED before calling ->atomic_open()
nfs: set FILE_CREATED
gfs2: set FILE_CREATED
cifs: fix filp leak in cifs_atomic_open()
vfs: improve i_op->atomic_open() documentation
autofs4: close the races around autofs4_notify_daemon()
17 Sep, 2013
1 commit
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Fix documentation of ->atomic_open() and related functions: finish_open()
and finish_no_open(). Also add details that seem to be unclear and a
source of bugs (some of which are fixed in the following series).Cc-ing maintainers of all filesystems implementing ->atomic_open().
Signed-off-by: Miklos Szeredi
Cc: Eric Van Hensbergen
Cc: Sage Weil
Cc: Steve French
Cc: Steven Whitehouse
Cc: Trond Myklebust
Signed-off-by: Al Viro
14 Sep, 2013
1 commit
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Acked-by: Jeff Layton
Signed-off-by: Björn JACKE
Signed-off-by: Steve French
13 Sep, 2013
1 commit
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Pull vfs pile 4 from Al Viro:
"list_lru pile, mostly"This came out of Andrew's pile, Al ended up doing the merge work so that
Andrew didn't have to.Additionally, a few fixes.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (42 commits)
super: fix for destroy lrus
list_lru: dynamically adjust node arrays
shrinker: Kill old ->shrink API.
shrinker: convert remaining shrinkers to count/scan API
staging/lustre/libcfs: cleanup linux-mem.h
staging/lustre/ptlrpc: convert to new shrinker API
staging/lustre/obdclass: convert lu_object shrinker to count/scan API
staging/lustre/ldlm: convert to shrinkers to count/scan API
hugepage: convert huge zero page shrinker to new shrinker API
i915: bail out earlier when shrinker cannot acquire mutex
drivers: convert shrinkers to new count/scan API
fs: convert fs shrinkers to new scan/count API
xfs: fix dquot isolation hang
xfs-convert-dquot-cache-lru-to-list_lru-fix
xfs: convert dquot cache lru to list_lru
xfs: rework buffer dispose list tracking
xfs-convert-buftarg-lru-to-generic-code-fix
xfs: convert buftarg LRU to generic code
fs: convert inode and dentry shrinking to be node aware
vmscan: per-node deferred work
...
12 Sep, 2013
3 commits
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Pull CIFS fixes from Steve French:
"CIFS update including case insensitive file name matching improvements
for UTF-8 to Unicode, various small cifs fixes, SMB2/SMB3 leasing
improvements, support for following SMB2 symlinks, SMB3 packet signing
improvements"* 'for-next' of git://git.samba.org/sfrench/cifs-2.6: (25 commits)
CIFS: Respect epoch value from create lease context v2
CIFS: Add create lease v2 context for SMB3
CIFS: Move parsing lease buffer to ops struct
CIFS: Move creating lease buffer to ops struct
CIFS: Store lease state itself rather than a mapped oplock value
CIFS: Replace clientCanCache* bools with an integer
[CIFS] quiet sparse compile warning
cifs: Start using per session key for smb2/3 for signature generation
cifs: Add a variable specific to NTLMSSP for key exchange.
cifs: Process post session setup code in respective dialect functions.
CIFS: convert to use le32_add_cpu()
CIFS: Fix missing lease break
CIFS: Fix a memory leak when a lease break comes
cifs: add winucase_convert.pl to Documentation/ directory
cifs: convert case-insensitive dentry ops to use new case conversion routines
cifs: add new case-insensitive conversion routines that are based on wchar_t's
[CIFS] Add Scott to list of cifs contributors
cifs: Move and expand MAX_SERVER_SIZE definition
cifs: Expand max share name length to 256
cifs: Move string length definitions to uapi
... -
Command line option rootfstype=ramfs to obtain old initramfs behavior, and
use ramfs instead of tmpfs for stub when root= defined (for cosmetic
reasons).[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Rob Landley
Cc: Jeff Layton
Cc: Jens Axboe
Cc: Stephen Warren
Cc: Rusty Russell
Cc: Jim Cromie
Cc: Sam Ravnborg
Cc: Greg Kroah-Hartman
Cc: "Eric W. Biederman"
Cc: Alexander Viro
Cc: "H. Peter Anvin"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix mistake in the description of Committed_AS in kernel documentation.
Signed-off-by: Minto Joseph
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Sep, 2013
1 commit
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For a long time no filesystem has been using vfs_follow_link, and as seen
by recent filesystem submissions any new use is accidental as well.Remove vfs_follow_link, document the replacement in
Documentation/filesystems/porting and also rename __vfs_follow_link
to match its only caller better.Signed-off-by: Christoph Hellwig
Signed-off-by: Al Viro
10 Sep, 2013
1 commit
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Pull ceph updates from Sage Weil:
"This includes both the first pile of Ceph patches (which I sent to
torvalds@vger, sigh) and a few new patches that add support for
fscache for Ceph. That includes a few fscache core fixes that David
Howells asked go through the Ceph tree. (Thanks go to Milosz Tanski
for putting this feature together)This first batch of patches (included here) had (has) several
important RBD bug fixes, hole punch support, several different
cleanups in the page cache interactions, improvements in the truncate
code (new truncate mutex to avoid shenanigans with i_mutex), and a
series of fixes in the synchronous striping read/write code.On top of that is a random collection of small fixes all across the
tree (error code checks and error path cleanup, obsolete wq flags,
etc)"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (43 commits)
ceph: use d_invalidate() to invalidate aliases
ceph: remove ceph_lookup_inode()
ceph: trivial buildbot warnings fix
ceph: Do not do invalidate if the filesystem is mounted nofsc
ceph: page still marked private_2
ceph: ceph_readpage_to_fscache didn't check if marked
ceph: clean PgPrivate2 on returning from readpages
ceph: use fscache as a local presisent cache
fscache: Netfs function for cleanup post readpages
FS-Cache: Fix heading in documentation
CacheFiles: Implement interface to check cache consistency
FS-Cache: Add interface to check consistency of a cached object
rbd: fix null dereference in dout
rbd: fix buffer size for writes to images with snapshots
libceph: use pg_num_mask instead of pgp_num_mask for pg.seed calc
rbd: fix I/O error propagation for reads
ceph: use vfs __set_page_dirty_nobuffers interface instead of doing it inside filesystem
ceph: allow sync_read/write return partial successed size of read/write.
ceph: fix bugs about handling short-read for sync read mode.
ceph: remove useless variable revoked_rdcache
...
09 Sep, 2013
3 commits
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Add the script used to generate the case-conversion tables to the
Documentation/ directory, in case we ever need to update or regenerate
these tables in the future.Signed-off-by: Jeff Layton
Signed-off-by: Steve French -
Signed-off-by: Steve French
-
Currently, we have a number of documentation files that live under
fs/cifs/. Generally, these don't get picked up by distro packagers,
since they're in a non-standard location. Move them to a new spot
under Documentation/ instead.Signed-off-by: Jeff Layton
Signed-off-by: Steve French
07 Sep, 2013
3 commits
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Pull trivial tree from Jiri Kosina:
"The usual trivial updates all over the tree -- mostly typo fixes and
documentation updates"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (52 commits)
doc: Documentation/cputopology.txt fix typo
treewide: Convert retrun typos to return
Fix comment typo for init_cma_reserved_pageblock
Documentation/trace: Correcting and extending tracepoint documentation
mm/hotplug: fix a typo in Documentation/memory-hotplug.txt
power: Documentation: Update s2ram link
doc: fix a typo in Documentation/00-INDEX
Documentation/printk-formats.txt: No casts needed for u64/s64
doc: Fix typo "is is" in Documentations
treewide: Fix printks with 0x%#
zram: doc fixes
Documentation/kmemcheck: update kmemcheck documentation
doc: documentation/hwspinlock.txt fix typo
PM / Hibernate: add section for resume options
doc: filesystems : Fix typo in Documentations/filesystems
scsi/megaraid fixed several typos in comments
ppc: init_32: Fix error typo "CONFIG_START_KERNEL"
treewide: Add __GFP_NOWARN to k.alloc calls with v.alloc fallbacks
page_isolation: Fix a comment typo in test_pages_isolated()
doc: fix a typo about irq affinity
... -
Pull ext3, reiserfs, udf & isofs fixes from Jan Kara:
"The contains a bunch of ext3 cleanups and minor improvements, major
reiserfs locking changes which should hopefully fix deadlocks
introduced by BKL removal, and udf/isofs changes to refuse mounting fs
rw instead of mounting it ro automatically which makes eject button
work as expected for all media (see the changelog for why userspace
should be ok with this change)"* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
jbd: use a single printk for jbd_debug()
reiserfs: locking, release lock around quota operations
reiserfs: locking, handle nested locks properly
reiserfs: locking, push write lock out of xattr code
jbd: relocate assert after state lock in journal_commit_transaction()
udf: Refuse RW mount of the filesystem instead of making it RO
udf: Standardize return values in mount sequence
isofs: Refuse RW mount of the filesystem instead of making it RO
ext3: allow specifying external journal by pathname mount option
jbd: remove unneeded semicolon -
Pull f2fs updates from Jaegeuk Kim:
"This patch-set includes the following major enhancement patches:
- support inline xattrs
- add sysfs support to control GCs explicitly
- add proc entry to show the current segment usage information
- improve the GC/SSR performanceThe other bug fixes are as follows:
- avoid the overflow on status calculation
- fix some error handling routines
- fix inconsistent xattr states after power-off-recovery
- fix incorrect xattr node offset definition
- fix deadlock condition in fsync
- fix the fdatasync routine for power-off-recovery"* tag 'for-f2fs-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (40 commits)
f2fs: optimize gc for better performance
f2fs: merge more bios of node block writes
f2fs: avoid an overflow during utilization calculation
f2fs: trigger GC when there are prefree segments
f2fs: use strncasecmp() simplify the string comparison
f2fs: fix omitting to update inode page
f2fs: support the inline xattrs
f2fs: add the truncate_xattr_node function
f2fs: introduce __find_xattr for readability
f2fs: reserve the xattr space dynamically
f2fs: add flags for inline xattrs
f2fs: fix error return code in init_f2fs_fs()
f2fs: fix wrong BUG_ON condition
f2fs: fix memory leak when init f2fs filesystem fail
f2fs: fix a compound statement label error
f2fs: avoid writing inode redundantly when creating a file
f2fs: alloc_page() doesn't return an ERR_PTR
f2fs: should cover i_xattr_nid with its xattr node page lock
f2fs: check the free space first in new_node_page
f2fs: clean up the needless end 'return' of void function
...
06 Sep, 2013
3 commits
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Currently the fscache code expect the netfs to call fscache_readpages_or_alloc
inside the aops readpages callback. It marks all the pages in the list
provided by readahead with PG_private_2. In the cases that the netfs fails to
read all the pages (which is legal) it ends up returning to the readahead and
triggering a BUG. This happens because the page list still contains marked
pages.This patch implements a simple fscache_readpages_cancel function that the netfs
should call before returning from readpages. It will revoke the pages from the
underlying cache backend and unmark them.The problem was originally worked out in the Ceph devel tree, but it also
occurs in CIFS. It appears that NFS, AFS and 9P are okay as read_cache_pages()
will clean up the unprocessed pages in the case of an error.This can be used to address the following oops:
[12410647.597278] BUG: Bad page state in process petabucket pfn:3d504e
[12410647.597292] page:ffffea000f541380 count:0 mapcount:0 mapping:
(null) index:0x0
[12410647.597298] page flags: 0x200000000001000(private_2)...
[12410647.597334] Call Trace:
[12410647.597345] [] dump_stack+0x19/0x1b
[12410647.597356] [] bad_page+0xc7/0x120
[12410647.597359] [] free_pages_prepare+0x10e/0x120
[12410647.597361] [] free_hot_cold_page+0x40/0x170
[12410647.597363] [] __put_single_page+0x27/0x30
[12410647.597365] [] put_page+0x25/0x40
[12410647.597376] [] ceph_readpages+0x2e9/0x6e0 [ceph]
[12410647.597379] [] __do_page_cache_readahead+0x1af/0x260
[12410647.597382] [] ra_submit+0x21/0x30
[12410647.597384] [] filemap_fault+0x254/0x490
[12410647.597387] [] __do_fault+0x6f/0x4e0
[12410647.597391] [] ? __switch_to+0x16d/0x4a0
[12410647.597395] [] ? finish_task_switch+0x5a/0xc0
[12410647.597398] [] handle_pte_fault+0xf6/0x930
[12410647.597401] [] ? pte_mfn_to_pfn+0x93/0x110
[12410647.597403] [] ? xen_pmd_val+0xe/0x10
[12410647.597405] [] ? __raw_callee_save_xen_pmd_val+0x11/0x1e
[12410647.597407] [] handle_mm_fault+0x251/0x370
[12410647.597411] [] ? call_rwsem_down_read_failed+0x14/0x30
[12410647.597414] [] __do_page_fault+0x1aa/0x550
[12410647.597418] [] ? up_write+0x1d/0x20
[12410647.597422] [] ? vm_mmap_pgoff+0xbc/0xe0
[12410647.597425] [] ? SyS_mmap_pgoff+0xd8/0x240
[12410647.597427] [] do_page_fault+0xe/0x10
[12410647.597431] [] page_fault+0x28/0x30Signed-off-by: Milosz Tanski
Signed-off-by: David Howells -
Fix a heading in the documentation to make it consistent with the contents
list.Signed-off-by: David Howells
-
Extend the fscache netfs API so that the netfs can ask as to whether a cache
object is up to date with respect to its corresponding netfs object:int fscache_check_consistency(struct fscache_cookie *cookie)
This will call back to the netfs to check whether the auxiliary data associated
with a cookie is correct. It returns 0 if it is and -ESTALE if it isn't; it
may also return -ENOMEM and -ERESTARTSYS.The backends now have to implement a mandatory operation pointer:
int (*check_consistency)(struct fscache_object *object)
that corresponds to the above API call. FS-Cache takes care of pinning the
object and the cookie in memory and managing this call with respect to the
object state.Original-author: Hongyi Jia
Signed-off-by: David Howells
cc: Hongyi Jia
cc: Milosz Tanski
29 Aug, 2013
1 commit
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It's always been a hassle that if an external journal's
device number changes, the filesystem won't mount.
And since boot-time enumeration can change, device number
changes aren't unusual.The current mechanism to update the journal location is by
passing in a mount option w/ a new devnum, but that's a hassle;
it's a manual approach, fixing things after the fact.Adding a mount option, "-o journal_path=/dev/$DEVICE" would
help, since then we can do i.e.# mount -o journal_path=/dev/disk/by-label/$JOURNAL_LABEL ...
and it'll mount even if the devnum has changed, as shown here:
# losetup /dev/loop0 journalfile
# mke2fs -L mylabel-journal -O journal_dev /dev/loop0
# mkfs.ext4 -L mylabel -J device=/dev/loop0 /dev/sdb1Change the journal device number:
# losetup -d /dev/loop0
# losetup /dev/loop1 journalfileAnd today it will fail:
# mount /dev/sdb1 /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so# dmesg | tail -n 1
[17343.240702] EXT4-fs (sdb1): error: couldn't read superblock of external journalBut with this new mount option, we can specify the new path:
# mount -o journal_path=/dev/loop1 /dev/sdb1 /mnt/test
#(which does update the encoded device number, incidentally):
# umount /dev/sdb1
# dumpe2fs -h /dev/sdb1 | grep "Journal device"
dumpe2fs 1.41.12 (17-May-2010)
Journal device: 0x0701But best of all we can just always mount by journal-path, and
it'll always work:# mount -o journal_path=/dev/disk/by-label/mylabel-journal /dev/sdb1 /mnt/test
#So the journal_path option can be specified in fstab, and as long as
the disk is available somewhere, and findable by label (or by UUID),
we can mount.Signed-off-by: Eric Sandeen
Signed-off-by: "Theodore Ts'o"
Reviewed-by: Jan Kara
Reviewed-by: Carlos Maiolino
20 Aug, 2013
1 commit
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Correct spelling typo in Documentations/filesystems.
Signed-off-by: Masanari Iida
Acked-by: Randy Dunlap
Signed-off-by: Jiri Kosina
06 Aug, 2013
2 commits
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Add sysfs entry gc_idle to control the gc policy. Where
gc_idle = 1 corresponds to selecting a cost benefit approach,
while gc_idle = 2 corresponds to selecting a greedy approach
to garbage collection. The selection is mutually exclusive one
approach will work at any point. If gc_idle = 0, then this
option is disabled.Cc: Gu Zheng
Signed-off-by: Namjae Jeon
Signed-off-by: Pankaj Kumar
Reviewed-by: Gu Zheng
[Jaegeuk Kim: change the select_gc_type() flow slightly]
Signed-off-by: Jaegeuk Kim -
Add sysfs entries to control the timing parameters for
f2fs gc thread.Various Sysfs options introduced are:
gc_min_sleep_time: Min Sleep time for GC in ms
gc_max_sleep_time: Max Sleep time for GC in ms
gc_no_gc_sleep_time: Default Sleep time for GC in msCc: Gu Zheng
Signed-off-by: Namjae Jeon
Signed-off-by: Pankaj Kumar
Reviewed-by: Gu Zheng
[Jaegeuk Kim: fix an umount bug and some minor changes]
Signed-off-by: Jaegeuk Kim
01 Aug, 2013
1 commit
-
It's always been a hassle that if an external journal's
device number changes, the filesystem won't mount.
And since boot-time enumeration can change, device number
changes aren't unusual.The current mechanism to update the journal location is by
passing in a mount option w/ a new devnum, but that's a hassle;
it's a manual approach, fixing things after the fact.Adding a mount option, "-o journal_path=/dev/$DEVICE" would
help, since then we can do i.e.# mount -o journal_path=/dev/disk/by-label/$JOURNAL_LABEL ...
and it'll mount even if the devnum has changed, as shown here:
# losetup /dev/loop0 journalfile
# mke2fs -L mylabel-journal -O journal_dev /dev/loop0
# mkfs.ext3 -L mylabel -J device=/dev/loop0 /dev/sdb1Change the journal device number:
# losetup -d /dev/loop0
# losetup /dev/loop1 journalfileAnd today it will fail:
# mount /dev/sdb1 /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so# dmesg | tail -n 1
[17343.240702] EXT3-fs (sdb1): error: couldn't read superblock of external journalBut with this new mount option, we can specify the new path:
# mount -o journal_path=/dev/loop1 /dev/sdb1 /mnt/test
#(which does update the encoded device number, incidentally):
# umount /dev/sdb1
# dumpe2fs -h /dev/sdb1 | grep "Journal device"
dumpe2fs 1.41.12 (17-May-2010)
Journal device: 0x0701But best of all we can just always mount by journal-path, and
it'll always work:# mount -o journal_path=/dev/disk/by-label/mylabel-journal /dev/sdb1 /mnt/test
#So the journal_path option can be specified in fstab, and as long as
the disk is available somewhere, and findable by label (or by UUID),
we can mount.Signed-off-by: Eric Sandeen
Signed-off-by: Jan Kara
30 Jul, 2013
1 commit
-
This patch adds some description on fsck.f2fs and dump.f2fs which is
recently merged into f2fs-tools.Signed-off-by: Changman Lee
Signed-off-by: Jaegeuk Kim
25 Jul, 2013
1 commit
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Correct typo (double words) in documentations.
Signed-off-by: Masanari Iida
Acked-by: Randy Dunlap
Signed-off-by: Jiri Kosina
14 Jul, 2013
1 commit
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Pull more xfs updates from Ben Myers:
"Here are a fix for xfs_fsr, a cleanup in bulkstat, a cleanup in
xfs_open_by_handle, updated mount options documentation, a cleanup in
xfs_bmapi_write, a fix for the size of dquot log reservations, a fix
for sgid inheritance when acls are in use, a fix for cleaning up
quotainfo structures, and some more of the work which allows group and
project quotas to be used together.We had a few more in this last quota category that we might have liked
to get in, but it looks there are still a few items that need to be
addressed.- fix for xfs_fsr returning -EINVAL
- cleanup in xfs_bulkstat
- cleanup in xfs_open_by_handle
- update mount options documentation
- clean up local format handling in xfs_bmapi_write
- fix dquot log reservations which were too small
- fix sgid inheritance for subdirectories when default acls are in use
- add project quota fields to various structures
- fix teardown of quotainfo structures when quotas are turned off"* tag 'for-linus-v3.11-rc1-2' of git://oss.sgi.com/xfs/xfs:
xfs: Fix the logic check for all quotas being turned off
xfs: Add pquota fields where gquota is used.
xfs: fix sgid inheritance for subdirectories inheriting default acls [V3]
xfs: dquot log reservations are too small
xfs: remove local fork format handling from xfs_bmapi_write()
xfs: update mount options documentation
xfs: use get_unused_fd_flags(0) instead of get_unused_fd()
xfs: clean up unused codes at xfs_bulkstat()
xfs: use XFS_BMAP_BMDR_SPACE vs. XFS_BROOT_SIZE_ADJ
10 Jul, 2013
1 commit
-
Because it's horribly out of date.
And mark various deprecated options as deprecated and give them a
removal date.Signed-off-by: Dave Chinner
Reviewed-by: Mark Tinguely
Signed-off-by: Ben Myers
05 Jul, 2013
1 commit
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Pull trivial tree updates from Jiri Kosina:
"The usual stuff from trivial tree"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits)
treewide: relase -> release
Documentation/cgroups/memory.txt: fix stat file documentation
sysctl/net.txt: delete reference to obsolete 2.4.x kernel
spinlock_api_smp.h: fix preprocessor comments
treewide: Fix typo in printk
doc: device tree: clarify stuff in usage-model.txt.
open firmware: "/aliasas" -> "/aliases"
md: bcache: Fixed a typo with the word 'arithmetic'
irq/generic-chip: fix a few kernel-doc entries
frv: Convert use of typedef ctl_table to struct ctl_table
sgi: xpc: Convert use of typedef ctl_table to struct ctl_table
doc: clk: Fix incorrect wording
Documentation/arm/IXP4xx fix a typo
Documentation/networking/ieee802154 fix a typo
Documentation/DocBook/media/v4l fix a typo
Documentation/video4linux/si476x.txt fix a typo
Documentation/virtual/kvm/api.txt fix a typo
Documentation/early-userspace/README fix a typo
Documentation/video4linux/soc-camera.txt fix a typo
lguest: fix CONFIG_PAE -> CONFIG_x86_PAE in comment
...
04 Jul, 2013
4 commits
-
Signed-off-by: Mel Gorman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The documentation for address_space_operations is partially out of date.
Signed-off-by: Mel Gorman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The soft-dirty is a bit on a PTE which helps to track which pages a task
writes to. In order to do this tracking one should1. Clear soft-dirty bits from PTEs ("echo 4 > /proc/PID/clear_refs)
2. Wait some time.
3. Read soft-dirty bits (55'th in /proc/PID/pagemap2 entries)To do this tracking, the writable bit is cleared from PTEs when the
soft-dirty bit is. Thus, after this, when the task tries to modify a
page at some virtual address the #PF occurs and the kernel sets the
soft-dirty bit on the respective PTE.Note, that although all the task's address space is marked as r/o after
the soft-dirty bits clear, the #PF-s that occur after that are processed
fast. This is so, since the pages are still mapped to physical memory,
and thus all the kernel does is finds this fact out and puts back
writable, dirty and soft-dirty bits on the PTE.Another thing to note, is that when mremap moves PTEs they are marked
with soft-dirty as well, since from the user perspective mremap modifies
the virtual memory at mremap's new address.Signed-off-by: Pavel Emelyanov
Cc: Matt Mackall
Cc: Xiao Guangrong
Cc: Glauber Costa
Cc: Marcelo Tosatti
Cc: KOSAKI Motohiro
Cc: Stephen Rothwell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Pull second set of VFS changes from Al Viro:
"Assorted f_pos race fixes, making do_splice_direct() safe to call with
i_mutex on parent, O_TMPFILE support, Jeff's locks.c series,
->d_hash/->d_compare calling conventions changes from Linus, misc
stuff all over the place."* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
Document ->tmpfile()
ext4: ->tmpfile() support
vfs: export lseek_execute() to modules
lseek_execute() doesn't need an inode passed to it
block_dev: switch to fixed_size_llseek()
cpqphp_sysfs: switch to fixed_size_llseek()
tile-srom: switch to fixed_size_llseek()
proc_powerpc: switch to fixed_size_llseek()
ubi/cdev: switch to fixed_size_llseek()
pci/proc: switch to fixed_size_llseek()
isapnp: switch to fixed_size_llseek()
lpfc: switch to fixed_size_llseek()
locks: give the blocked_hash its own spinlock
locks: add a new "lm_owner_key" lock operation
locks: turn the blocked_list into a hashtable
locks: convert fl_link to a hlist_node
locks: avoid taking global lock if possible when waking up blocked waiters
locks: protect most of the file_lock handling with i_lock
locks: encapsulate the fl_link list handling
locks: make "added" in __posix_lock_file a bool
...
03 Jul, 2013
3 commits
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Signed-off-by: Al Viro
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Pull f2fs updates from Jaegeuk Kim:
"This patch-set includes the following major enhancement patches:
- remount_fs callback function
- restore parent inode number to enhance the fsync performance
- xattr security labels
- reduce the number of redundant lock/unlock data pages
- avoid frequent write_inode callsThe other minor bug fixes are as follows.
- endian conversion bugs
- various bugs in the roll-forward recovery routine"* tag 'for-f2fs-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (56 commits)
f2fs: fix to recover i_size from roll-forward
f2fs: remove the unused argument "sbi" of func destroy_fsync_dnodes()
f2fs: remove reusing any prefree segments
f2fs: code cleanup and simplify in func {find/add}_gc_inode
f2fs: optimize the init_dirty_segmap function
f2fs: fix an endian conversion bug detected by sparse
f2fs: fix crc endian conversion
f2fs: add remount_fs callback support
f2fs: recover wrong pino after checkpoint during fsync
f2fs: optimize do_write_data_page()
f2fs: make locate_dirty_segment() as static
f2fs: remove unnecessary parameter "offset" from __add_sum_entry()
f2fs: avoid freqeunt write_inode calls
f2fs: optimise the truncate_data_blocks_range() range
f2fs: use the F2FS specific flags in f2fs_ioctl()
f2fs: sync dir->i_size with its block allocation
f2fs: fix i_blocks translation on various types of files
f2fs: set sb->s_fs_info before calling parse_options()
f2fs: support xattr security labels
f2fs: fix iget/iput of dir during recovery
... -
Pull ext4 update from Ted Ts'o:
"Lots of bug fixes, cleanups and optimizations. In the bug fixes
category, of note is a fix for on-line resizing file systems where the
block size is smaller than the page size (i.e., file systems 1k blocks
on x86, or more interestingly file systems with 4k blocks on Power or
ia64 systems.)In the cleanup category, the ext4's punch hole implementation was
significantly improved by Lukas Czerner, and now supports bigalloc
file systems. In addition, Jan Kara significantly cleaned up the
write submission code path. We also improved error checking and added
a few sanity checks.In the optimizations category, two major optimizations deserve
mention. The first is that ext4_writepages() is now used for
nodelalloc and ext3 compatibility mode. This allows writes to be
submitted much more efficiently as a single bio request, instead of
being sent as individual 4k writes into the block layer (which then
relied on the elevator code to coalesce the requests in the block
queue). Secondly, the extent cache shrink mechanism, which was
introduce in 3.9, no longer has a scalability bottleneck caused by the
i_es_lru spinlock. Other optimizations include some changes to reduce
CPU usage and to avoid issuing empty commits unnecessarily."* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (86 commits)
ext4: optimize starting extent in ext4_ext_rm_leaf()
jbd2: invalidate handle if jbd2_journal_restart() fails
ext4: translate flag bits to strings in tracepoints
ext4: fix up error handling for mpage_map_and_submit_extent()
jbd2: fix theoretical race in jbd2__journal_restart
ext4: only zero partial blocks in ext4_zero_partial_blocks()
ext4: check error return from ext4_write_inline_data_end()
ext4: delete unnecessary C statements
ext3,ext4: don't mess with dir_file->f_pos in htree_dirblock_to_tree()
jbd2: move superblock checksum calculation to jbd2_write_superblock()
ext4: pass inode pointer instead of file pointer to punch hole
ext4: improve free space calculation for inline_data
ext4: reduce object size when !CONFIG_PRINTK
ext4: improve extent cache shrink mechanism to avoid to burn CPU time
ext4: implement error handling of ext4_mb_new_preallocation()
ext4: fix corruption when online resizing a fs with 1K block size
ext4: delete unused variables
ext4: return FIEMAP_EXTENT_UNKNOWN for delalloc extents
jbd2: remove debug dependency on debug_fs and update Kconfig help text
jbd2: use a single printk for jbd_debug()
...
29 Jun, 2013
5 commits
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There's no reason we have to protect the blocked_hash and file_lock_list
with the same spinlock. With the tests I have, breaking it in two gives
a barely measurable performance benefit, but it seems reasonable to make
this locking as granular as possible.Signed-off-by: Jeff Layton
Signed-off-by: Al Viro -
Currently, the hashing that the locking code uses to add these values
to the blocked_hash is simply calculated using fl_owner field. That's
valid in most cases except for server-side lockd, which validates the
owner of a lock based on fl_owner and fl_pid.In the case where you have a small number of NFS clients doing a lot
of locking between different processes, you could end up with all
the blocked requests sitting in a very small number of hash buckets.Add a new lm_owner_key operation to the lock_manager_operations that
will generate an unsigned long to use as the key in the hashtable.
That function is only implemented for server-side lockd, and simply
XORs the fl_owner and fl_pid.Signed-off-by: Jeff Layton
Acked-by: J. Bruce Fields
Signed-off-by: Al Viro -
Having a global lock that protects all of this code is a clear
scalability problem. Instead of doing that, move most of the code to be
protected by the i_lock instead. The exceptions are the global lists
that the ->fl_link sits on, and the ->fl_block list.->fl_link is what connects these structures to the
global lists, so we must ensure that we hold those locks when iterating
over or updating these lists.Furthermore, sound deadlock detection requires that we hold the
blocked_list state steady while checking for loops. We also must ensure
that the search and update to the list are atomic.For the checking and insertion side of the blocked_list, push the
acquisition of the global lock into __posix_lock_file and ensure that
checking and update of the blocked_list is done without dropping the
lock in between.On the removal side, when waking up blocked lock waiters, take the
global lock before walking the blocked list and dequeue the waiters from
the global list prior to removal from the fl_block list.With this, deadlock detection should be race free while we minimize
excessive file_lock_lock thrashing.Finally, in order to avoid a lock inversion problem when handling
/proc/locks output we must ensure that manipulations of the fl_block
list are also protected by the file_lock_lock.Signed-off-by: Jeff Layton
Signed-off-by: Al Viro -
Instances either don't look at it at all (the majority of cases) or
only want it to find the superblock (which can be had as dentry->d_sb).
A few cases that want more are actually safe with dentry->d_inode -
the only precaution needed is the check that it hadn't been replaced with
NULL by rmdir() or by overwriting rename(), which case should be simply
treated as cache miss.Signed-off-by: Linus Torvalds
Signed-off-by: Al Viro -
everything's converted to ->iterate()
Signed-off-by: Al Viro