31 Oct, 2008
12 commits
-
Just corrected the book name. I'm probably the only one who ever read
this file :-)Signed-off-by: Jiri Pirko
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The total width of the command name plus spaces should be
8 characters, but were 7 and 9, respectively. With 8 chars,
all commands are now lining up nicely.The mandocs, psdocs, xmldocs commands are OK.
Before:
HOSTCC scripts/basic/docproc
DOCPROC Documentation/DocBook/deviceiobook.xml
HTML Documentation/DocBook/deviceiobook.html
DOCPROC Documentation/DocBook/wanbook.xml
PDF Documentation/DocBook/wanbook.pdfAfter:
HOSTCC scripts/basic/docproc
DOCPROC Documentation/DocBook/deviceiobook.xml
HTML Documentation/DocBook/deviceiobook.html
DOCPROC Documentation/DocBook/wanbook.xml
PDF Documentation/DocBook/wanbook.pdfSigned-off-by: Hans Ulrich Niedermann
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Nothing uses prepare_write or commit_write. Remove them from the tree
completely.[akpm@linux-foundation.org: schedule simple_prepare_write() for unexporting]
Signed-off-by: Nick Piggin
Cc: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- remove 'private' field from struct subsys
- remove cgroup_init_smp()Signed-off-by: Li Zefan
Acked-by: Paul Menage
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Just call unfreeze_cgroup() if goal_state == THAWED, and call
try_to_freeze_cgroup() if goal_state == FROZEN.No behavior has been changed.
Signed-off-by: Li Zefan
Acked-by: Cedric Le Goater
Acked-by: Matt Helsley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Don't duplicate the implementation of thaw_process().
[akpm@linux-foundation.org: make __thaw_process() static]
Signed-off-by: Li Zefan
Cc: Cedric Le Goater
Acked-by: Matt Helsley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It is sufficient to check if @task is frozen, and no need to check if the
original freezer is frozen.Signed-off-by: Li Zefan
Acked-by: Cedric Le Goater
Acked-by: Matt Helsley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The BUG_ON() should be protected by freezer->lock, otherwise it can be
triggered easily when a task has been unfreezed but the corresponding
cgroup hasn't been changed to FROZEN state.Signed-off-by: Li Zefan
Acked-by: Cedric Le Goater
Acked-by: Matt Helsley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I wrote a new module for Intel X38 chipset. This chipset is very similar
to Intel 3200 chipset, but there are some different points, so I copyed
i3200_edac.c and modified.This is Intel's web page describing this chipset.
http://www.intel.com/Products/Desktop/Chipsets/X38/X38-overview.htmI've tested this new module with broken memory, and it seems to be working
well.Signed-off-by: Hitoshi Mitake
Signed-off-by: Doug Thompson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Removed duplicated #include's in drivers/video/via/global.h.
debug.h
viafbdev.h
viamode.hSigned-off-by: Huang Weiyi
Cc: Joseph Chan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
By default, non-privileged tasks can only mlock() a small amount of
memory to avoid a DoS attack by ordinary users. The Linux kernel
defaulted to 32k (on a 4k page size system) to accommodate the needs of
gpg.However, newer gpg2 needs 64k in various circumstances and otherwise
fails miserably, see bnc#329675.Change the default to 64k, and make it more agnostic to PAGE_SIZE.
Signed-off-by: Kurt Garloff
Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Oct, 2008
8 commits
-
…nel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (31 commits)
ftrace: fix current_tracer error return
tracing: fix a build error on alpha
ftrace: use a real variable for ftrace_nop in x86
tracing/ftrace: make boot tracer select the sched_switch tracer
tracepoint: check if the probe has been registered
asm-generic: define DIE_OOPS in asm-generic
trace: fix printk warning for u64
ftrace: warning in kernel/trace/ftrace.c
ftrace: fix build failure
ftrace, powerpc, sparc64, x86: remove notrace from arch ftrace file
ftrace: remove ftrace hash
ftrace: remove mcount set
ftrace: remove daemon
ftrace: disable dynamic ftrace for all archs that use daemon
ftrace: add ftrace warn on to disable ftrace
ftrace: only have ftrace_kill atomic
ftrace: use probe_kernel
ftrace: comment arch ftrace code
ftrace: return error on failed modified text.
ftrace: dynamic ftrace process only text section
... -
* 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm:
KVM: ia64: Makefile fix for forcing to re-generate asm-offsets.h
KVM: Future-proof device assignment ABI
KVM: ia64: Fix halt emulation logic
KVM: Fix guest shared interrupt with in-kernel irqchip
KVM: MMU: sync root on paravirt TLB flush -
…/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
lockdep: fix irqs on/off ip tracing
lockdep: minor fix for debug_show_all_locks()
x86: restore the old swiotlb alloc_coherent behavior
x86: use GFP_DMA for 24bit coherent_dma_mask
swiotlb: remove panic for alloc_coherent failure
xen: compilation fix of drivers/xen/events.c on IA64
xen: portability clean up and some minor clean up for xencomm.c
xen: don't reload cr3 on suspend
kernel/resource: fix reserve_region_with_split() section mismatch
printk: remove unused code from kernel/printk.c -
…git/tip/linux-2.6-tip
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
irq: make variable static -
…l/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: fix documentation reference for sched_min_granularity_ns
sched: virtual time buddy preemption
sched: re-instate vruntime based wakeup preemption
sched: weaken sync hint
sched: more accurate min_vruntime accounting
sched: fix a find_busiest_group buglet
sched: add CONFIG_SMP consistency -
…git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, memory hotplug: remove wrong -1 in calling init_memory_mapping()
x86: keep the /proc/meminfo page count correct
x86/uv: memory allocation at initialization
xen: fix Xen domU boot with batched mprotect -
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
[S390] s390: Fix build for !CONFIG_S390_GUEST + CONFIG_VIRTIO_CONSOLE
[S390] No more 4kb stacks.
[S390] Change default IPL method to IPL_VM.
[S390] tape: disable interrupts in tape_open and tape_release
[S390] appldata: unsigned ops->size cannot be negative
[S390] tape block: complete request with correct locking
[S390] Fix sysdev class file creation.
[S390] pgtables: Fix race in enable_sie vs. page table ops
[S390] qdio: remove incorrect memset
[S390] qdio: prevent double qdio shutdown in case of I/O errors -
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
libata: ahci enclosure management bit mask
libata: ahci enclosure management led sync
pata_ninja32: suspend/resume support
libata: Fix LBA48 on pata_it821x RAID volumes.
libata: clear saved xfer_mode and ncq_enabled on device detach
sata_sil24: configure max read request size to 4k
libata: add missing kernel-doc
libata: fix device iteration bugs
ahci: Add support for Promise PDC42819
ata: Switch all my stuff to a common address
28 Oct, 2008
20 commits
-
The commit (in linux-tip) c2931e05ec5965597cbfb79ad332d4a29aeceb23
( ftrace: return an error when setting a nonexistent tracer )
added useful code that would error when a bad tracer was written into
the current_tracer file.But this had a bug if the amount written was more than the amount read by
that code. The first iteration would set the tracer correctly, but since
it did not consume the rest of what was written (usually whitespace), the
userspace utility would continue to write what was not consumed. This
second iteration would fail to find a tracer and return -EINVAL. Funny
thing is that the tracer would have already been set.This patch just consumes all the data that is written to the file.
Signed-off-by: Steven Rostedt
Signed-off-by: Ingo Molnar -
To avoid using stale asm-offsets.h.
Signed-off-by: Xiantao Zhang
Signed-off-by: Avi Kivity -
Reserve some space so we can add more data.
Signed-off-by: Avi Kivity
-
Common halt logic was changed by x86 and did not update ia64. This patch
updates halt for ia64.Fixes a regression causing guests to hang with more than 2 vcpus.
Signed-off-by: Xiantao Zhang
Signed-off-by: Avi Kivity -
Every call of kvm_set_irq() should offer an irq_source_id, which is
allocated by kvm_request_irq_source_id(). Based on irq_source_id, we
identify the irq source and implement logical OR for shared level
interrupts.The allocated irq_source_id can be freed by kvm_free_irq_source_id().
Currently, we support at most sizeof(unsigned long) different irq sources.
[Amit: - rebase to kvm.git HEAD
- move definition of KVM_USERSPACE_IRQ_SOURCE_ID to common file
- move kvm_request_irq_source_id to the update_irq ioctl][Xiantao: - Add kvm/ia64 stuff and make it work for kvm/ia64 guests]
Signed-off-by: Sheng Yang
Signed-off-by: Amit Shah
Signed-off-by: Xiantao Zhang
Signed-off-by: Avi Kivity -
The pvmmu TLB flush handler should request a root sync, similarly to
a native read-write CR3.Signed-off-by: Marcelo Tosatti
Signed-off-by: Avi Kivity -
Impact: fix lockdep lock-api-caller output when irqsoff tracing is enabled
81d68a96 "ftrace: trace irq disabled critical timings" added wrappers around
trace_hardirqs_on/off_caller. However these functions use
__builtin_return_address(0) to figure out which function actually disabled
or enabled irqs. The result is that we save the ips of trace_hardirqs_on/off
instead of the real caller. Not very helpful.However since the patch from Steven the ip already gets passed. So use that
and get rid of __builtin_return_address(0) in these two functions.Signed-off-by: Heiko Carstens
Signed-off-by: Ingo Molnar -
The s390 kernel does not compile if virtio console is enabled, but guest
support is disabled:LD .tmp_vmlinux1
arch/s390/kernel/built-in.o: In function `setup_arch':
/space/linux-2.5/arch/s390/kernel/setup.c:773: undefined reference to
`s390_virtio_console_init'The fix is related to
commit 99e65c92f2bbf84f43766a8bf701e36817d62822
Author: Christian Borntraeger
Date: Fri Jul 25 15:50:04 2008 +0200
KVM: s390: Fix guest kconfigWhich changed the build process to build kvm_virtio.c only if CONFIG_S390_GUEST
is set. We must ifdef the prototype in the header file accordingly.Reported-by: Heiko Carstens
Signed-off-by: Christian Borntraeger
Signed-off-by: Martin Schwidefsky -
We got a stack overflow with a small stack configuration on a 32 bit
system. It just looks like as 4kb isn't enough and too dangerous.
So lets get rid of 4kb stacks on 32 bit.But one thing I completely dislike about the call trace below is that
just for debugging or tracing purposes sprintf gets called (cio_start_key):/* process condition code */
sprintf(dbf_txt, "ccode:%d", ccode);
CIO_TRACE_EVENT(4, dbf_txt);But maybe its just me who thinks that this could be done better.
Kernel stack overflow.
Modules linked in: dm_multipath sunrpc bonding qeth_l2 dm_mod qeth ccwgroup vmur
CPU: 1 Not tainted 2.6.27-30.x.20081015-s390default #1
Process httpd (pid: 3807, task: 20ae2df8, ksp: 1666fb78)
Krnl PSW : 040c0000 8027098a (number+0xe/0x348)
R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:0 CC:0 PM:0
Krnl GPRS: 00d43318 0027097c 1666f277 9666f270
00000000 00000000 0000000a ffffffff
9666f270 1666f228 1666f277 1666f098
00000002 80270982 80271016 1666f098
Krnl Code: 8027097e: f0340dd0a7f1 srp 3536(4,%r0),2033(%r10),4
80270984: 0f00 clcl %r0,%r0
80270986: a7840001 brc 8,80270988
>8027098a: 18ef lr %r14,%r15
8027098c: a7faff68 ahi %r15,-152
80270990: 18bf lr %r11,%r15
80270992: 18a2 lr %r10,%r2
80270994: 1893 lr %r9,%r3Modified calltrace with annotated stackframe size of each function:
stackframe size
|
0 304 vsnprintf+850 [0x271016]
1 72 sprintf+74 [0x271522]
2 56 cio_start_key+262 [0x2d4c16]
3 56 ccw_device_start_key+222 [0x2dfe92]
4 56 ccw_device_start+40 [0x2dff28]
5 48 raw3215_start_io+104 [0x30b0f8]
6 56 raw3215_write+494 [0x30ba0a]
7 40 con3215_write+68 [0x30bafc]
8 40 __call_console_drivers+146 [0x12b0fa]
9 32 _call_console_drivers+102 [0x12b192]
10 64 release_console_sem+268 [0x12b614]
11 168 vprintk+462 [0x12bca6]
12 72 printk+68 [0x12bfd0]
13 256 __print_symbol+50 [0x15a882]
14 56 __show_trace+162 [0x103d06]
15 32 show_trace+224 [0x103e70]
16 48 show_stack+152 [0x103f20]
17 56 dump_stack+126 [0x104612]
18 96 __alloc_pages_internal+592 [0x175004]
19 80 cache_alloc_refill+776 [0x196f3c]
20 40 __kmalloc+258 [0x1972ae]
21 40 __alloc_skb+94 [0x328086]
22 32 pskb_copy+50 [0x328252]
23 32 skb_realloc_headroom+110 [0x328a72]
24 104 qeth_l2_hard_start_xmit+378 [0x7803bfde]
25 56 dev_hard_start_xmit+450 [0x32ef6e]
26 56 __qdisc_run+390 [0x3425d6]
27 48 dev_queue_xmit+410 [0x331e06]
28 40 ip_finish_output+308 [0x354ac8]
29 56 ip_output+218 [0x355b6e]
30 24 ip_local_out+56 [0x354584]
31 120 ip_queue_xmit+300 [0x355cec]
32 96 tcp_transmit_skb+812 [0x367da8]
33 40 tcp_push_one+158 [0x369fda]
34 112 tcp_sendmsg+852 [0x35d5a0]
35 240 sock_sendmsg+164 [0x32035c]
36 56 kernel_sendmsg+86 [0x32064a]
37 88 sock_no_sendpage+98 [0x322b22]
38 104 tcp_sendpage+70 [0x35cc1e]
39 48 sock_sendpage+74 [0x31eb66]
40 64 pipe_to_sendpage+102 [0x1c4b2e]
41 64 __splice_from_pipe+120 [0x1c5340]
42 72 splice_from_pipe+90 [0x1c57e6]
43 56 generic_splice_sendpage+38 [0x1c5832]
44 48 do_splice_from+104 [0x1c4c38]
45 48 direct_splice_actor+52 [0x1c4c88]
46 80 splice_direct_to_actor+180 [0x1c4f80]
47 72 do_splice_direct+70 [0x1c5112]
48 64 do_sendfile+360 [0x19de18]
49 72 sys_sendfile64+126 [0x19df32]
50 336 sysc_do_restart+18 [0x111a1a]Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
allyesconfig and allmodconfig built kernels have a tape IPL record.
A the vmreader record makes much more sense, since hardly anybody will
ever IPL a kernel from tape. So change the default.
As I side effect I can test these kernels without fiddling around with
the kernel config ;)Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Get tape device lock with interrupts disabled. Otherwise lockdep will issue a
warning similar to:=================================
[ INFO: inconsistent lock state ]
2.6.27 #1
---------------------------------
inconsistent {in-hardirq-W} -> {hardirq-on-W} usage.
vol_id/2903 [HC0[0]:SC0[0]:HE1:SE1] takes:
(sch->lock){++..}, at: [] tape_open+0x42/0x1a4 [tape]
{in-hardirq-W} state was registered at:
[] __lock_acquire+0x894/0xa74
[] lock_acquire+0x92/0xb8
[] _spin_lock+0x5c/0x9c
[] do_IRQ+0x124/0x1f0
[] io_return+0x0/0x8irq event stamp: 847
hardirqs last enabled at (847): [] trace_hardirqs_on+0x2a/0x38
hardirqs last disabled at (846): [] trace_hardirqs_off+0x2a/0x38
softirqs last enabled at (0): [] copy_process+0x43e/0x11f4
softirqs last disabled at (0): [] 0x0other info that might help us debug this:
1 lock held by vol_id/2903:
#0: (&bdev->bd_mutex){--..}, at: [] do_open+0x78/0x358stack backtrace:
CPU: 1 Not tainted 2.6.27 #1},
Process vol_id (pid: 2903, task: 000000003d4c0000, ksp: 000000003d4e3b10)
0400000000000000 000000003d4e3830 0000000000000002 0000000000000000
000000003d4e38d0 000000003d4e3848 000000003d4e3848 00000000000168a8
0000000000000000 000000003d4e3b10 0000000000000000 0000000000000000
000000003d4e3830 000000000000000c 000000003d4e3830 000000003d4e38a0
000000000034aa98 00000000000168a8 000000003d4e3830 000000003d4e3880
Call Trace:
([] show_trace+0x138/0x158)
[] show_stack+0xc6/0xf8
[] dump_stack+0xb0/0xc0
[] print_usage_bug+0x1e8/0x228
[] mark_lock+0xb14/0xd24
[] __lock_acquire+0x792/0xa74
[] lock_acquire+0x92/0xb8
[] _spin_lock+0x5c/0x9c
[] tape_open+0x42/0x1a4 [tape]
[] tapeblock_open+0x98/0xd0 [tape]Signed-off-by: Frank Munzert
Signed-off-by: Martin Schwidefsky -
unsigned ops->size cannot be negative
Signed-off-by: Roel Kluin
Signed-off-by: Martin Schwidefsky -
__blk_end_request must be called with request queue lock held. We need to use
blk_end_request rather than __blk_end_request.Signed-off-by: Frank Munzert
Signed-off-by: Martin Schwidefsky -
Use sysdev_class_create_file() to create create sysdev class attributes
instead of sysfs_create_file(). Using sysfs_create_file() wasn't a very
good idea since the show and store functions have a different amount of
parameters for sysfs files and sysdev class files.
In particular the pointer to the buffer is the last argument and
therefore accesses to random memory regions happened.
Still worked surprisingly well until we got a kernel panic.Cc: stable@kernel.org
Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
The current enable_sie code sets the mm->context.pgstes bit to tell
dup_mm that the new mm should have extended page tables. This bit is also
used by the s390 specific page table primitives to decide about the page
table layout - which means context.pgstes has two meanings. This can cause
any kind of bugs. For example - e.g. shrink_zone can call
ptep_clear_flush_young while enable_sie is running. ptep_clear_flush_young
will test for context.pgstes. Since enable_sie changed that value of the old
struct mm without changing the page table layout ptep_clear_flush_young will
do the wrong thing.
The solution is to split pgstes into two bits
- one for the allocation
- one for the current stateSigned-off-by: Christian Borntraeger
Signed-off-by: Martin Schwidefsky -
Remove the memset since zeroing the string is not needed and use
snprintf instead of sprintf.Signed-off-by: Jan Glauber
Signed-off-by: Martin Schwidefsky -
In case of I/O errors on a qdio subchannel qdio_shutdown may be
called twice by the qdio driver and by zfcp. Remove the
superfluous shutdown from qdio and let the upper layer driver
handle the error condition.Signed-off-by: Jan Glauber
Signed-off-by: Martin Schwidefsky -
When we failed to get tasklist_lock eventually (count equals 0),
we should only print " ignoring it.\n", and not print
" locked it.\n" needlessly.Signed-off-by: Qinghuang Feng
Signed-off-by: Ingo Molnar -
Impact: build fix on Alpha
When tracing is enabled, some arch have included
on their but others like alpha or m68k don't.Build error on alpha:
kernel/trace/trace.c: In function 'tracing_cpumask_write':
kernel/trace/trace.c:2145: error: implicit declaration of function 'raw_local_irq_disable'
kernel/trace/trace.c:2162: error: implicit declaration of function 'raw_local_irq_enable'Tested on Alpha through a cross-compiler (should correct a similar issue on m68k).
Reported-by: Alexey Dobriyan
Signed-off-by: Frederic Weisbecker
Signed-off-by: Ingo Molnar -
Impact: fix crash with memory hotplug
Shuahua Li found:
| I just did some experiments on a desktop for memory hotplug and this bug
| triggered a crash in my test.
|
| Yinghai's suggestion also fixed the bug.We don't need to round it, just remove that extra -1
Signed-off-by: Yinghai
Signed-off-by: Ingo Molnar
