This patch solves the following problem:
Now some samples may be lost due to throttling. The number of samples is
restricted by sysctl_perf_event_sample_rate/HZ. A trace event is
divided on some samples according to event's period. I don't sure, that
we should generate more than one sample on each trace event. I think the
better way to use SAMPLE_PERIOD.
E.g.: I want to trace when a process sleeps. I created a process, which
sleeps for 1ms and for 4ms. perf got 100 events in both cases.
swapper 0 [000] 1141.371830: sched_stat_sleep: comm=foo pid=1801 delay=1386750 [ns]
swapper 0 [000] 1141.369444: sched_stat_sleep: comm=foo pid=1801 delay=4499585 [ns]
In the first case a kernel want to send 4499585 events and
in the second case it wants to send 1386750 events.
perf-reports shows that process sleeps in both places equal time. It's
bug.
With this patch kernel generates one event on each "sleep" and the time
slice is saved in the field "period". Perf knows how handle it.
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1320670457-2633428-3-git-send-email-avagin@openvz.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Split the callchain code from the perf events core into
a new kernel/events/callchain.c file.
This simplifies a bit the big core.c
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
[keep ctx recursion handling inline and use internal headers]
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1318778104-17152-1-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Add a sanity test of x86 insn decoder against a stream
of randomly generated input, at build time.
This test is also able to reproduce any bug that might
trigger by allowing the passing of random-seed and
iteration-number to the test, or by passing input
which has invalid byte code.
Changes in V2:
- Code cleanup.
- Show how to reproduce the error by insn_sanity test.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: acme@redhat.com
Cc: ming.m.lin@intel.com
Cc: robert.richter@amd.com
Cc: ravitillo@lbl.gov
Cc: yrl.pp-manager.tt@hitachi.com
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20111020140109.20938.92572.stgit@localhost.localdomain
Signed-off-by: Ingo Molnar <mingo@elte.hu>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
drivers/media: video/a5k6aa is a module and so needs module.h
mfd: fix build failures in recently added ab5500 code
hwspinlock/u8500: include linux/module.h
MTD: MAPS: bcm963xx-flash.c: explicitly include module.h
* 'for-linus' of git://neil.brown.name/md:
md/raid5: STRIPE_ACTIVE has lock semantics, add barriers
md/raid5: abort any pending parity operations when array fails.
* 'docs-move' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs: (45 commits)
DocBook/drm: Clean up a todo-note
DocBook/drm: `device aware' -> `device-aware'
DocBook/drm: `(device|driver) specific' -> `(device|driver)-specific'
DocBook/drm: Clean up the paragraph on framebuffer objects
DocBook/drm: Use `; otherwise,'
DocBook/drm: Better flow with `, and then'
DocBook/drm: Refer to the domain-setting function as a device-specific ioctl
DocBook/drm: Improve flow of GPU/CPU coherence sentence
DocBook/drm: Use an <itemizelist> for fundamental GEM operations
DocBook/drm: Insert a comma
DocBook/drm: Use a <variablelist> for vblank ioctls
DocBook/drm: Use an itemizedlist for what an encoder needs to provide
DocBook/drm: Insert `the' for readability, and change `set' to `setting'
DocBook/drm: Remove extraneous commas
DocBook/drm: Use a colon
DocBook/drm: Clarify `final initialization' via better formatting
DocBook/drm: Remove redundancy
DocBook/drm: Insert `it' for smooth reading
DocBook/drm: The word `so-called'; I do not think it connotes what you think it connotes
DocBook/drm: Use a singular subject for grammatical cleanliness
...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest: (21 commits)
ktest: Evaluate variables entered on the command line
ktest: Add variable ${PWD}
ktest: Add another monitor flush before installing kernel
ktest: Do not opencode reboot in grub setting
ktest: Add processing of complex conditionals
ktest: Fix parsing of config section lines
ktest: Sort make_min_config configs by dependecies
ktest: Add DEFINED keyword for IF statements
ktest: Add OVERRIDE keyword to DEFAULTS section
ktest: Consolidate TEST_TYPE and DEFAULT code
ktest: Add INCLUDE keyword to include other config files
ktest: Let IF keyword take comparisons
ktest: Add IF and ELSE to config sections
ktest: Do not reboot on config or build issues
ktest: Add option REBOOT_SUCCESS_LINE to stop waiting after a reboot
ktest: Add NO_INSTALL option to not install for a test
ktest: Fail when grub menu not found
ktest: Include monitor in reboot code
ktest: Only need to save .config when doing mrproper
ktest: Create outputdir if it does not exist
...
Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...))
[The semantic patch that makes this change is available
in scripts/coccinelle/api/err_cast.cocci.
More information about semantic patching is available at
http://coccinelle.lip6.fr/]
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock:
hwspinlock/u8500: fix build error due to undefined label
hwspinlock: Don't return a value in __hwspin_unlock
Otherwise we get compile errors like this:
ERROR: "led_classdev_unregister" [drivers/platform/x86/dell-laptop.ko] undefined!
ERROR: "led_classdev_register" [drivers/platform/x86/dell-laptop.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2
when the dell-laptop support is enabled without the necessary LED
support being enabled.
Reported-by: Alessandro Suardi <alessandro.suardi@gmail.com>
Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This file uses core functions like module_init() and module_exit()
and so it explicitly needs to include the module.h header.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Alek Du reported that the code erroneously applies time to jiffies
conversions twice to the t1 and t2 values. In normal use on a modem link
this cases no visible problem but on a slower link it will break as with
HZ=1000 as is typical we are running t1/t2 ten times too fast.
Alek's original patch removed the conversion from the timer setting but we
in fact have to be more careful as the contents of t1/t2 are visible via
the device API and we thus need to correct the constants.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix below build error:
CC drivers/hwspinlock/u8500_hsem.o
drivers/hwspinlock/u8500_hsem.c: In function 'u8500_hsem_probe':
drivers/hwspinlock/u8500_hsem.c:113: error: label 'free_state' used but not defined
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Fix below build warning:
CC arch/arm/mach-omap2/hwspinlock.o
In file included from arch/arm/mach-omap2/hwspinlock.c:22:
include/linux/hwspinlock.h: In function '__hwspin_unlock':
include/linux/hwspinlock.h:121: warning: 'return' with a value, in function returning void
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
All updates that occur under STRIPE_ACTIVE should be globally visible
when STRIPE_ACTIVE clears. test_and_set_bit() implies a barrier, but
clear_bit() does not.
This is suitable for 3.1-stable.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
When the number of failed devices exceeds the allowed number
we must abort any active parity operations (checks or updates) as they
are no longer meaningful, and can lead to a BUG_ON in
handle_parity_checks6.
This bug was introduce by commit 6c0069c0ae
in 2.6.29.
Reported-by: Manish Katiyar <mkatiyar@gmail.com>
Tested-by: Manish Katiyar <mkatiyar@gmail.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
These files had implicit dependencies on modular support
which now show up as build failures with the module cleanup
work merged to mainline.
Reported-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Include module.h to fix below build error:
CC drivers/hwspinlock/u8500_hsem.o
drivers/hwspinlock/u8500_hsem.c:177: error: 'THIS_MODULE' undeclared here (not in a function)
[...]
drivers/hwspinlock/u8500_hsem.c:196: warning: type defaults to 'int' in declaration of 'MODULE_AUTHOR'
drivers/hwspinlock/u8500_hsem.c:196: warning: function declaration isn't a prototype
make[2]: *** [drivers/hwspinlock/u8500_hsem.o] Error 1
make[1]: *** [drivers/hwspinlock] Error 2
make: *** [drivers] Error 2
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
module.h was previously implicitly included through mtd/mtd.h.
Fixes the following build failure after the module.h cleanup:
CC drivers/mtd/maps/bcm963xx-flash.o
drivers/mtd/maps/bcm963xx-flash.c: In function 'bcm963xx_probe':
drivers/mtd/maps/bcm963xx-flash.c:208:29: error: 'THIS_MODULE' undeclared (first use in this function)
[...]
drivers/mtd/maps/bcm963xx-flash.c:276:1: warning: type defaults to 'int' in declaration of 'MODULE_AUTHOR'
drivers/mtd/maps/bcm963xx-flash.c:276:15: warning: function declaration isn't a prototype
make[7]: *** [drivers/mtd/maps/bcm963xx-flash.o] Error 1
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
.. with new name. Because nothing says "really solid kernel release"
like naming it after an extinct animal that just happened to be in the
news lately.
Mountpoint crossing is similar to following procfs symlinks - we do
not get ->d_revalidate() called for dentry we have arrived at, with
unpleasant consequences for NFS4.
Simple way to reproduce the problem in mainline:
cat >/tmp/a.c <<'EOF'
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
main()
{
struct flock fl = {.l_type = F_RDLCK, .l_whence = SEEK_SET, .l_len = 1};
if (fcntl(0, F_SETLK, &fl))
perror("setlk");
}
EOF
cc /tmp/a.c -o /tmp/test
then on nfs4:
mount --bind file1 file2
/tmp/test < file1 # ok
/tmp/test < file2 # spews "setlk: No locks available"...
What happens is the missing call of ->d_revalidate() after mountpoint
crossing and that's where NFS4 would issue OPEN request to server.
The fix is simple - treat mountpoint crossing the same way we deal with
following procfs-style symlinks. I.e. set LOOKUP_JUMPED...
Cc: stable@kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The "private_date" field in struct devfreq_dev_status almost certainly
wants to be "private_data"; since there are no in-tree users of this
functionality, now seems like an easy time to make the fix.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Fix a typo in Documentation/cgroups/freezer-subsystem.txt.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Since commit 4a31a334, the name of this misc device is not initialized,
which leads to a funny device named /dev/(null) being created and
/proc/misc containing an entry with just a number but no name. The latter
leads to complaints by cryptsetup, which caused me to investigate this
matter.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf top: Fix live annotation in the --stdio interface
perf top tui: Don't recalc column widths considering just the first page
perf report: Add progress bar when processing time ordered events
perf hists browser: Warn about lost events
perf tools: Fix a typo of command name as trace-cmd
perf hists: Fix recalculation of total_period when sorting entries
perf header: Fix build on old systems
perf ui browser: Handle K_RESIZE in dialog windows
perf ui browser: No need to switch char sets that often
perf hists browser: Use K_TIMER
perf ui: Rename ui__warning_paranoid to ui__error_paranoid
perf ui: Reimplement the popup windows using libslang
perf ui: Reimplement ui__popup_menu using ui__browser
perf ui: Reimplement ui_helpline using libslang
perf ui: Improve handling sigwinch a bit
perf ui progress: Reimplement using slang
perf evlist: Fix grouping of multiple events
Commit 32aaeffbd4 (Merge branch
'modsplit-Oct31_2011'...) caused some build errors. Fix these
and make sure we always have export.h or module.h included
for MODULE_ and EXPORT_SYMBOL users:
$ grep -rl ^MODULE_ arch/arm/*omap*/*.c | xargs \
grep -L linux/module.h
arch/arm/mach-omap2/dsp.c
arch/arm/mach-omap2/mailbox.c
arch/arm/mach-omap2/omap-iommu.c
arch/arm/mach-omap2/smartreflex.c
Also check we either have export.h or module.h included
for the files exporting symbols:
$ grep -rl EXPORT_SYMBOL arch/arm/*omap*/*.c | xargs \
grep -L linux/export.h | xargs grep -L linux/module.h
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Include linux/export.h to fix below build warning:
CC arch/arm/plat-omap/omap_device.o
arch/arm/plat-omap/omap_device.c:1055: warning: data definition has no type or storage class
arch/arm/plat-omap/omap_device.c:1055: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL'
arch/arm/plat-omap/omap_device.c:1055: warning: parameter names (without types) in function declaration
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (47 commits)
forcedeth: fix a few sparse warnings (variable shadowing)
forcedeth: Improve stats counters
forcedeth: remove unneeded stats updates
forcedeth: Acknowledge only interrupts that are being processed
forcedeth: fix race when unloading module
MAINTAINERS/rds: update maintainer
wanrouter: Remove kernel_lock annotations
usbnet: fix oops in usbnet_start_xmit
ixgbe: Fix compile for kernel without CONFIG_PCI_IOV defined
etherh: Add MAINTAINERS entry for etherh
bonding: comparing a u8 with -1 is always false
sky2: fix regression on Yukon Optima
netlink: clarify attribute length check documentation
netlink: validate NLA_MSECS length
i825xx:xscale:8390:freescale: Fix Kconfig dependancies
macvlan: receive multicast with local address
tg3: Update version to 3.121
tg3: Eliminate timer race with reset_task
tg3: Schedule at most one tg3_reset_task run
tg3: Obtain PCI function number from device
...
If the set_ftrace_filter is cleared by writing just whitespace to
it, then the filter hash refcounts will be decremented but not
updated. This causes two bugs:
1) No functions will be enabled for tracing when they all should be
2) If the users clears the set_ftrace_filter twice, it will crash ftrace:
------------[ cut here ]------------
WARNING: at /home/rostedt/work/git/linux-trace.git/kernel/trace/ftrace.c:1384 __ftrace_hash_rec_update.part.27+0x157/0x1a7()
Modules linked in:
Pid: 2330, comm: bash Not tainted 3.1.0-test+ #32
Call Trace:
[<ffffffff81051828>] warn_slowpath_common+0x83/0x9b
[<ffffffff8105185a>] warn_slowpath_null+0x1a/0x1c
[<ffffffff810ba362>] __ftrace_hash_rec_update.part.27+0x157/0x1a7
[<ffffffff810ba6e8>] ? ftrace_regex_release+0xa7/0x10f
[<ffffffff8111bdfe>] ? kfree+0xe5/0x115
[<ffffffff810ba51e>] ftrace_hash_move+0x2e/0x151
[<ffffffff810ba6fb>] ftrace_regex_release+0xba/0x10f
[<ffffffff8112e49a>] fput+0xfd/0x1c2
[<ffffffff8112b54c>] filp_close+0x6d/0x78
[<ffffffff8113a92d>] sys_dup3+0x197/0x1c1
[<ffffffff8113a9a6>] sys_dup2+0x4f/0x54
[<ffffffff8150cac2>] system_call_fastpath+0x16/0x1b
---[ end trace 77a3a7ee73794a02 ]---
Link: http://lkml.kernel.org/r/20111101141420.GA4918@debian
Reported-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This fixes the following sparse warnings:
drivers/net/ethernet/nvidia/forcedeth.c:2113:7: warning: symbol 'size' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2102:6: originally declared here
drivers/net/ethernet/nvidia/forcedeth.c:2155:7: warning: symbol 'size' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2102:6: originally declared here
drivers/net/ethernet/nvidia/forcedeth.c:2227:7: warning: symbol 'size' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2215:6: originally declared here
drivers/net/ethernet/nvidia/forcedeth.c:2271:7: warning: symbol 'size' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2215:6: originally declared here
drivers/net/ethernet/nvidia/forcedeth.c:2986:20: warning: symbol 'addr' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2963:6: originally declared here
Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Rx byte count was off; instead use the hardware's count. Tx packet
count was counting pre-TSO packets; instead count on-the-wire packets.
Report hardware dropped frame count as rx_fifo_errors.
- The count of transmitted packets reported by the forcedeth driver
reports pre-TSO (TCP Segmentation Offload) packet counts and not the
count of the number of packets sent on the wire. This change fixes
the forcedeth driver to report the correct count. Fixed the code by
copying the count stored in the NIC H/W to the value reported by the
driver.
- Count rx_drop_frame errors as rx_fifo_errors:
We see a lot of rx_drop_frame errors if we disable the rx bottom-halves
for too long. Normally, rx_fifo_errors would be counted in this case.
The rx_drop_frame error count is private to forcedeth and is not
reported by ifconfig or sysfs. The rx_fifo_errors count is currently
unused in the forcedeth driver. It is reported by ifconfig as overruns.
This change reports rx_drop_frame errors as rx_fifo_errors.
Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Function ndo_get_stats() updates most of the stats from hardware
registers, making the manual updates un-needed. This change removes
these manual updates. Main exception is rx_missed_errors which needs
manual update.
Another exception is rx_packets, still updated manually in this commit
to make sure this patch doesn't change behavior of driver. This will
be addressed by a future patch.
Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This is to avoid a race, accidentally acknowledging an interrupt that
we didn't notice and won't immediately process. This is based solely
on code inspection; it is not known if there was an actual bug here.
Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When forcedeth module is unloaded, there exists a path that can lead
to mod_timer() after del_timer_sync(), causing an oops. This patch
short-circuits this unneeded path, which originates in
nv_get_ethtool_stats().
Tested:
x86_64 16-way + 3 ethtool -S infinite loops + 100Mbps incoming traffic
+ rmmod/modprobe/ifconfig in a loop
Initial-Author: Salman Qazi <sqazi@google.com>
Discussion: http://patchwork.ozlabs.org/patch/123548/
Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
since it uses the module facilities.
Reported-by: Witold Baryluk <baryluk@smp.if.uj.edu.pl>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For the files which are not themselves modular, we can change
them to include only the smaller export.h since all they are
doing is looking for EXPORT_SYMBOL.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
These files didn't exist at the time of the module.h split, and
so were not fixed by the commits on that baseline. Since they use
the EXPORT_SYMBOL and/or THIS_MODULE macros, they will need the
new export.h file included that provides them.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The BKL is gone, these annotations are useless.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
