11 Nov, 2010
1 commit
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This patch brings the Ack Vector interface up to date. Its main purpose is
to lay the basis for the subsequent patches of this set, which will use the
new data structure fields and routines.There are no real algorithmic changes, rather an adaptation:
(1) Replaced the static Ack Vector size (2) with a #define so that it can
be adapted (with low loss / Ack Ratio, a value of 1 works, so 2 seems
to be sufficient for the moment) and added a solution so that computing
the ECN nonce will continue to work - even with larger Ack Vectors.(2) Replaced the #defines for Ack Vector states with a complete enum.
(3) Replaced #defines to compute Ack Vector length and state with general
purpose routines (inlines), and updated code to use these.(4) Added a `tail' field (conversion to circular buffer in subsequent patch).
(5) Updated the (outdated) documentation for Ack Vector struct.
(6) All sequence number containers now trimmed to 48 bits.
(7) Removal of unused bits:
* removed dccpav_ack_nonce from struct dccp_ackvec, since this is already
redundantly stored in the `dccpavr_ack_nonce' (of Ack Vector record);
* removed Elapsed Time for Ack Vectors (it was nowhere used);
* replaced semantics of dccpavr_sent_len with dccpavr_ack_runlen, since
the code needs to be able to remember the old run length;
* reduced the de-/allocation routines (redundant / duplicate tests).Signed-off-by: Gerrit Renker
09 Nov, 2010
28 commits
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unix_dgram_poll() is pretty expensive to check POLLOUT status, because
it has to lock the socket to get its peer, take a reference on the peer
to check its receive queue status, and queue another poll_wait on
peer_wait. This all can be avoided if the process calling
unix_dgram_poll() is not interested in POLLOUT status. It makes
unix_dgram_recvmsg() faster by not queueing irrelevant pollers in
peer_wait.On a test program provided by Alan Crequy :
Before:
real 0m0.211s
user 0m0.000s
sys 0m0.208sAfter:
real 0m0.044s
user 0m0.000s
sys 0m0.040sSuggested-by: Davide Libenzi
Reported-by: Alban Crequy
Acked-by: Davide Libenzi
Signed-off-by: Eric Dumazet
Signed-off-by: David S. Miller -
Alban Crequy reported a problem with connected dgram af_unix sockets and
provided a test program. epoll() would miss to send an EPOLLOUT event
when a thread unqueues a packet from the other peer, making its receive
queue not full.This is because unix_dgram_poll() fails to call sock_poll_wait(file,
&unix_sk(other)->peer_wait, wait);
if the socket is not writeable at the time epoll_ctl(ADD) is called.We must call sock_poll_wait(), regardless of 'writable' status, so that
epoll can be notified later of states changes.Misc: avoids testing twice (sk->sk_shutdown & RCV_SHUTDOWN)
Reported-by: Alban Crequy
Cc: Davide Libenzi
Signed-off-by: Eric Dumazet
Acked-by: Davide Libenzi
Signed-off-by: David S. Miller -
Instead of wakeup all sleepers, use wake_up_interruptible_sync_poll() to
wakeup only ones interested into writing the socket.This patch is a specialization of commit 37e5540b3c9d (epoll keyed
wakeups: make sockets use keyed wakeups).On a test program provided by Alan Crequy :
Before:
real 0m3.101s
user 0m0.000s
sys 0m6.104sAfter:
real 0m0.211s
user 0m0.000s
sys 0m0.208sReported-by: Alban Crequy
Signed-off-by: Eric Dumazet
Cc: Davide Libenzi
Signed-off-by: David S. Miller -
While tracking dev_base_lock users, I found decnet used it in
dnet_select_source(), but for a wrong purpose:Writers only hold RTNL, not dev_base_lock, so readers must use RCU if
they cannot use RTNL.Adds an rcu_head in struct dn_ifaddr and handle proper RCU management.
Adds __rcu annotation in dn_route as well.
Signed-off-by: Eric Dumazet
Acked-by: Steven Whitehouse
Signed-off-by: David S. Miller -
bond_info_seq_start() uses a read_lock(&dev_base_lock) to make sure
device doesn’t disappear. Same goal can be achieved using RCU.Signed-off-by: Eric Dumazet
Signed-off-by: David S. Miller -
dev_base_lock is the legacy way to lock the device list, and is planned
to disappear. (writers hold RTNL, readers hold RCU lock)Convert aoecmd_cfg_pkts() to RCU locking.
Signed-off-by: Eric Dumazet
Cc: "Ed L. Cashin"
Signed-off-by: David S. Miller -
Add suspend/resume support using default open/stop interface methods
to do hardware dependant operations.On suspend, same low power state (soft power mode) will be kept, the
following blocks will be disabled:- Internal PLL Clock
- Tx/Rx PHY
- MAC
- SPI InterfaceSigned-off-by: Abraham Arce
Signed-off-by: David S. Miller -
The sgs allocation error path leaks the allocated message.
Signed-off-by: Pavel Emelyanov
Acked-by: Andy Grover
Signed-off-by: David S. Miller -
QDIO is running independent from netdevice state. We are not
allowed to schedule NAPI in case the netdevice is not open.Signed-off-by: Frank Blaschka
Signed-off-by: David S. Miller -
For a certain Hipersockets specific error code in the xmit path, the
qeth driver tries to invoke dev_queue_xmit again.
Commit 79640a4ca6955e3ebdb7038508fa7a0cd7fa5527 introduces a busylock
causing locking problems in case of re-invoked dev_queue_xmit by qeth.
This patch removes the attempts to retry packet sending with
dev_queue_xmit from the qeth driver.Signed-off-by: Ursula Braun
Signed-off-by: Frank Blaschka
Signed-off-by: David S. Miller -
This fix a bug reported by backyes.
Right the first time pktgen's using queue_map that's not been initialized
by set_cur_queue_map(pkt_dev);Signed-off-by: Junchang Wang
Signed-off-by: Backyes
Signed-off-by: David S. Miller -
After e6484930d7c73d324bccda7d43d131088da697b9: net: allocate tx queues in register_netdevice
These calls make net drivers oops at load time, so let's avoid people
git-bisect'ing known problems.Signed-off-by: Guillaume Chazarain
Signed-off-by: David S. Miller -
After e6484930d7c73d324bccda7d43d131088da697b9: net: allocate tx queues in register_netdevice
It causes an Oops at skge_probe() time.Signed-off-by: Guillaume Chazarain
Signed-off-by: David S. Miller -
The type of FRAG6_CB(prev)->offset is int, skb->len is *unsigned* int,
and offset is int.Without this patch, type conversion occurred to this expression, when
(FRAG6_CB(prev)->offset + prev->len) is less than offset.Signed-off-by: Shan Wei
Signed-off-by: David S. Miller -
The basic classifier keeps statistics but does not report it to user space.
This showed up when using basic classifier (with police) as a default catch
all on ingress; no statistics were reported.Signed-off-by: Stephen Hemminger
Signed-off-by: David S. Miller -
Signed-off-by: David Woodhouse
Signed-off-by: David S. Miller -
The existing 'FirmwareVersion' attribute only covers the DSP firmware as
provided by Conexant; not the overall version of the device firmware. We
do want to be able to see the full version number too.Signed-off-by: David Woodhouse
Signed-off-by: David S. Miller -
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: Add new ext4 inode tracepoints
ext4: Don't call sb_issue_discard() in ext4_free_blocks()
ext4: do not try to grab the s_umount semaphore in ext4_quota_off
ext4: fix potential race when freeing ext4_io_page structures
ext4: handle writeback of inodes which are being freed
ext4: initialize the percpu counters before replaying the journal
ext4: "ret" may be used uninitialized in ext4_lazyinit_thread()
ext4: fix lazyinit hang after removing request -
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
TTY: move .gitignore from drivers/char/ to drivers/tty/vt/
TTY: create drivers/tty/vt and move the vt code there
TTY: create drivers/tty and move the tty core files there -
…egkh/staging-next-2.6
* 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-next-2.6:
Staging: ath6kl: remove empty files that mess with 'distclean'
staging: ath6kl: Fixing the driver to use modified mmc_host structure
Staging: solo6x10: fix build problem -
…nel/git/lethal/sh-2.6
* 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
mmc: sh_mmcif: Convert extern inline to static inline.
ARM: mach-shmobile: Allow GPIO chips to register IRQ mappings.
ARM: mach-shmobile: fix sh7372 after a recent clock framework rework
ARM: mach-shmobile: include drivers/sh/Kconfig
ARM: mach-shmobile: ap4evb: Add HDMI sound support
ARM: mach-shmobile: clock-sh7372: Add FSIDIV clock support
ARM: shmobile: remove sh_timer_config clk member -
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: clkfwk: Fix up checkpatch warnings.
sh: make some needlessly global sh7724 clocks static
sh: add clk_round_parent() to optimize parent clock rate
sh: Simplify phys_addr_mask()/PTE_PHYS_MASK for 29/32-bit.
sh: nommu: Support building without an uncached mapping.
sh: nommu: use 32-bit phys mode.
sh: mach-se: Fix up SE7206 no ioport build.
sh: intc: Update for single IRQ reservation helper.
sh: clkfwk: Fix up rate rounding error handling.
sh: mach-se: Rip out superfluous 7751 PIO routines.
sh: mach-se: Rip out superfluous 770x PIO routines.
sh: mach-edosk7705: Kill off machtype, consolidate board def.
sh: mach-edosk7705: update for this century, kill off PIO trapping.
sh: mach-se: Rip out superfluous 7206 PIO routines.
sh: mach-systemh: Kill off dead board.
sh: mach-snapgear: Kill off machtype, consolidate board def.
sh: mach-snapgear: Rip out superfluous PIO routines.
sh: mach-microdev: SuperIO-relative ioport mapping. -
Add ext4_evict_inode, ext4_drop_inode, ext4_mark_inode_dirty, and
ext4_begin_ordered_truncate()Signed-off-by: "Theodore Ts'o"
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Commit 5c521830cf (ext4: Support discard requests when running in
no-journal mode) attempts to add sb_issue_discard() for data blocks
(in data=writeback mode) and in no-journal mode. Unfortunately, this
no longer works, because in commit dd3932eddf (block: remove
BLKDEV_IFL_WAIT), sb_issue_discard() only presents a synchronous
interface, and there are times when we call ext4_free_blocks() when we
are are holding a spinlock, or are otherwise in an atomic context.For now, I've removed the call to sb_issue_discard() to prevent a
deadlock or (if spinlock debugging is enabled) failures like this:BUG: scheduling while atomic: rc.sysinit/1376/0x00000002
Pid: 1376, comm: rc.sysinit Not tainted 2.6.36-ARCH #1
Call Trace:
[] __schedule_bug+0x5e/0x70
[] schedule+0x950/0xa70
[] ? insert_work+0x7d/0x90
[] ? queue_work_on+0x1d/0x30
[] ? queue_work+0x37/0x60
[] schedule_timeout+0x21d/0x360
[] ? generic_make_request+0x2c3/0x540
[] wait_for_common+0xc0/0x150
[] ? default_wake_function+0x0/0x10
[] ? submit_bio+0x7c/0x100
[] ? wake_bit_function+0x0/0x40
[] wait_for_completion+0x18/0x20
[] blkdev_issue_discard+0x1b9/0x210
[] ext4_free_blocks+0x68e/0xb60
[] ? __ext4_handle_dirty_metadata+0x110/0x120
[] ext4_ext_truncate+0x8cc/0xa70
[] ? pagevec_lookup+0x1e/0x30
[] ext4_truncate+0x178/0x5d0
[] ? unmap_mapping_range+0xab/0x280
[] vmtruncate+0x56/0x70
[] ext4_setattr+0x14b/0x460
[] notify_change+0x194/0x380
[] do_truncate+0x60/0x90
[] ? security_inode_permission+0x1a/0x20
[] ? tomoyo_path_truncate+0x11/0x20
[] do_last+0x5d9/0x770
[] do_filp_open+0x1ed/0x680
[] ? page_fault+0x1f/0x30
[] ? alloc_fd+0xec/0x140
[] do_sys_open+0x61/0x120
[] sys_open+0x1b/0x20
[] system_call_fastpath+0x16/0x1bhttps://bugzilla.kernel.org/show_bug.cgi?id=22302
Reported-by: Mathias Burén
Signed-off-by: "Theodore Ts'o"
Cc: jiayingz@google.com -
It's not needed to sync the filesystem, and it fixes a lock_dep complaint.
Signed-off-by: Dmitry Monakhov
Signed-off-by: "Theodore Ts'o"
Reviewed-by: Jan Kara -
Use an atomic_t and make sure we don't free the structure while we
might still be submitting I/O for that page.Signed-off-by: "Theodore Ts'o"
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The following BUG can occur when an inode which is getting freed when
it still has dirty pages outstanding, and it gets deleted (in this
because it was the target of a rename). In ordered mode, we need to
make sure the data pages are written just in case we crash before the
rename (or unlink) is committed. If the inode is being freed then
when we try to igrab the inode, we end up tripping the BUG_ON at
fs/ext4/page-io.c:146.To solve this problem, we need to keep track of the number of io
callbacks which are pending, and avoid destroying the inode until they
have all been completed. That way we don't have to bump the inode
count to keep the inode from being destroyed; an approach which
doesn't work because the count could have already been dropped down to
zero before the inode writeback has started (at which point we're not
allowed to bump the count back up to 1, since it's already started
getting freed).Thanks to Dave Chinner for suggesting this approach, which is also
used by XFS.kernel BUG at /scratch_space/linux-2.6/fs/ext4/page-io.c:146!
Call Trace:
[] ext4_bio_write_page+0x172/0x307
[] mpage_da_submit_io+0x2f9/0x37b
[] mpage_da_map_and_submit+0x2cc/0x2e2
[] mpage_add_bh_to_extent+0xc6/0xd5
[] write_cache_pages_da+0x2a4/0x3ac
[] ext4_da_writepages+0x2d6/0x44d
[] do_writepages+0x1c/0x25
[] __filemap_fdatawrite_range+0x4b/0x4d
[] filemap_fdatawrite_range+0xe/0x10
[] jbd2_journal_begin_ordered_truncate+0x7b/0xa2
[] ext4_evict_inode+0x57/0x24c
[] evict+0x22/0x92
[] iput+0x212/0x249
[] dentry_iput+0xa1/0xb9
[] d_kill+0x3d/0x5d
[] dput+0x13a/0x147
[] sys_renameat+0x1b5/0x258
[] ? _atomic_dec_and_lock+0x2d/0x4c
[] ? cp_new_stat+0xde/0xea
[] ? sys_newlstat+0x2d/0x38
[] sys_rename+0x16/0x18
[] system_call_fastpath+0x16/0x1bReported-by: Nick Bowler
Signed-off-by: "Theodore Ts'o"
Tested-by: Nick Bowler
08 Nov, 2010
6 commits
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Presently the b43legacy build fails on an sh randconfig:
In file included from include/net/dst.h:12,
from drivers/net/wireless/b43legacy/xmit.c:32:
include/net/dst_ops.h:28: error: expected ':', ',', ';', '}' or '__attribute__' before '____cacheline_aligned_in_smp'
include/net/dst_ops.h: In function 'dst_entries_get_fast':
include/net/dst_ops.h:33: error: 'struct dst_ops' has no member named 'pcpuc_entries'
include/net/dst_ops.h: In function 'dst_entries_get_slow':
include/net/dst_ops.h:41: error: 'struct dst_ops' has no member named 'pcpuc_entries'
include/net/dst_ops.h: In function 'dst_entries_add':
include/net/dst_ops.h:49: error: 'struct dst_ops' has no member named 'pcpuc_entries'
include/net/dst_ops.h: In function 'dst_entries_init':
include/net/dst_ops.h:55: error: 'struct dst_ops' has no member named 'pcpuc_entries'
include/net/dst_ops.h: In function 'dst_entries_destroy':
include/net/dst_ops.h:60: error: 'struct dst_ops' has no member named 'pcpuc_entries'
make[5]: *** [drivers/net/wireless/b43legacy/xmit.o] Error 1
make[5]: *** Waiting for unfinished jobs....Signed-off-by: Paul Mundt
Signed-off-by: David S. Miller -
…xtension' into sh-fixes-for-linus
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The clk_round_parent() change introduced various checkpatch warnings,
tidy them up.Signed-off-by: Paul Mundt
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These clocks are currently only used inside one .c file and are not
declared in any headers, therefore having them global is useless.Signed-off-by: Guennadi Liakhovetski
Signed-off-by: Paul Mundt -
Sometimes it is possible and reasonable to adjust the parent clock rate to
improve precision of the child clock, e.g., if the child clock has no siblings.
clk_round_parent() is a new addition to the SH clock-framework API, that
implements such an optimization for child clocks with divisors, taking all
integer values in a range.Signed-off-by: Guennadi Liakhovetski
Signed-off-by: Paul Mundt
07 Nov, 2010
2 commits
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This should fix the following warning:
net/core/pktgen.c: In function ‘pktgen_if_write’:
net/core/pktgen.c:890: warning: comparison of distinct pointer types lacks a castSigned-off-by: Dmitry Torokhov
Reviewed-by: Nelson Elhage
Signed-off-by: David S. Miller -
These two .h files would get removed from the tree when doing
make distcleanIt turns out they are not needed at all, so just delete them which fixes
people's git trees when doing development.Reported-by: Andi Kleen
Signed-off-by: Greg Kroah-Hartman
06 Nov, 2010
3 commits
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While scanning the floopy code due to c093ee4f07f4 ("floppy: fix
use-after-free in module load failure path"), I found one more instance
of trying to access disk->queue pointer after doing put_disk() on
gendisk. For some reason , floppy moule still loads/unloads fine. The
object is probably still around with right pointer values.o There seems to be one more instance of trying to cleanup the request
queue after we have called put_disk() on associated gendisk.o This fix is more out of code inspection. Even without this fix for
some reason I am able to load/unload floppy module without any
issues.o Floppy module loads/unloads fine after the fix.
Signed-off-by: Vivek Goyal
Signed-off-by: Linus Torvalds -
The autogenerated files (consolemap_deftbl.c and defkeymap.c) need to
be ignored by git, so move the .gitignore file that was doing it to the
properly location now that the files have moved as well.Cc: Arnd Bergmann
Cc: Jiri Slaby
Cc: Alan Cox
Signed-off-by: Greg Kroah-Hartman -
Commit 27ae60f8f7aa ("ipw2x00: replace "ieee80211" with "libipw" where
appropriate") changed DRV_NAME to be "libipw", but didn't properly fix
up the places where it was used to specify the name for the /proc/net/
directory.For backwards compatibility reasons, that directory name remained
"ieee80211", but due to the DRV_NAME change, the error case printouts
and the cleanup functions now used "libipw" instead. Which made it all
fail badly.For example, on module unload as reported by Randy:
WARNING: at fs/proc/generic.c:816 remove_proc_entry+0x156/0x35e()
name 'libipw'because it's trying to unregister a /proc directory that obviously
doesn't even exist.Clean it all up to use DRV_PROCNAME for the actual /proc directory name.
Reported-and-tested-by: Randy Dunlap
Cc: Pavel Roskin
Cc: John W. Linville
Signed-off-by: Linus Torvalds
