23 Sep, 2009
1 commit
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When syslog is not possible, at the same time there's no serial/net
console available, it will be hard to read the printk messages. For
example oops/panic/warning messages in shutdown phase.Add a printk delay feature, we can make each printk message delay some
milliseconds.Setting the delay by proc/sysctl interface: /proc/sys/kernel/printk_delay
The value range from 0 - 10000, default value is 0
[akpm@linux-foundation.org: fix a few things]
Signed-off-by: Dave Young
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Sep, 2009
17 commits
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck:
kmemcheck: add missing braces to do-while in kmemcheck_annotate_bitfield
kmemcheck: update documentation
kmemcheck: depend on HAVE_ARCH_KMEMCHECK
kmemcheck: remove useless check
kmemcheck: remove duplicated #include -
* 'for-2.6.32' of git://linux-nfs.org/~bfields/linux: (68 commits)
nfsd4: nfsv4 clients should cross mountpoints
nfsd: revise 4.1 status documentation
sunrpc/cache: avoid variable over-loading in cache_defer_req
sunrpc/cache: use list_del_init for the list_head entries in cache_deferred_req
nfsd: return success for non-NFS4 nfs4_state_start
nfsd41: Refactor create_client()
nfsd41: modify nfsd4.1 backchannel to use new xprt class
nfsd41: Backchannel: Implement cb_recall over NFSv4.1
nfsd41: Backchannel: cb_sequence callback
nfsd41: Backchannel: Setup sequence information
nfsd41: Backchannel: Server backchannel RPC wait queue
nfsd41: Backchannel: Add sequence arguments to callback RPC arguments
nfsd41: Backchannel: callback infrastructure
nfsd4: use common rpc_cred for all callbacks
nfsd4: allow nfs4 state startup to fail
SUNRPC: Defer the auth_gss upcall when the RPC call is asynchronous
nfsd4: fix null dereference creating nfsv4 callback client
nfsd4: fix whitespace in NFSPROC4_CLNT_CB_NULL definition
nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel
sunrpc/cache: simplify cache_fresh_locked and cache_fresh_unlocked.
... -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits)
trivial: fix typo in aic7xxx comment
trivial: fix comment typo in drivers/ata/pata_hpt37x.c
trivial: typo in kernel-parameters.txt
trivial: fix typo in tracing documentation
trivial: add __init/__exit macros in drivers/gpio/bt8xxgpio.c
trivial: add __init macro/ fix of __exit macro location in ipmi_poweroff.c
trivial: remove unnecessary semicolons
trivial: Fix duplicated word "options" in comment
trivial: kbuild: remove extraneous blank line after declaration of usage()
trivial: improve help text for mm debug config options
trivial: doc: hpfall: accept disk device to unload as argument
trivial: doc: hpfall: reduce risk that hpfall can do harm
trivial: SubmittingPatches: Fix reference to renumbered step
trivial: fix typos "man[ae]g?ment" -> "management"
trivial: media/video/cx88: add __init/__exit macros to cx88 drivers
trivial: fix typo in CONFIG_DEBUG_FS in gcov doc
trivial: fix missing printk space in amd_k7_smp_check
trivial: fix typo s/ketymap/keymap/ in comment
trivial: fix typo "to to" in multiple files
trivial: fix typos in comments s/DGBU/DBGU/
... -
Add an example of how to use the MAP_HUGETLB flag to the vm documentation
directory and a reference to the example in hugetlbpage.txt.Signed-off-by: Eric B Munson
Acked-by: David Rientjes
Cc: Mel Gorman
Cc: Adam Litke
Cc: David Gibson
Cc: Lee Schermerhorn
Cc: Nick Piggin
Cc: Hugh Dickins
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In Documentation/numastat.txt, it confused me. For example, there are
nodes [0,1] in system.barrios:~$ cat /proc/zoneinfo | egrep 'numa|zone'
Node 0, zone DMA
numa_hit 33226
numa_miss 1739
numa_foreign 27978
..
..
Node 1, zone DMA
numa_hit 307
numa_miss 46900
numa_foreign 01) In node 0, NUMA_MISS means it wanted to allocate page
in node 1 but ended up with page in node 02) In node 0, NUMA_FOREIGN means it wanted to allocate page
in node 0 but ended up with page from Node 1.But now, numastat explains it oppositely about (MISS, FOREIGN).
Let's fix up with viewpoint of zone.Signed-off-by: Minchan Kim
Cc: KAMEZAWA Hiroyuki
Acked-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
oom-killer kills a process, not task. Then oom_score should be calculated
as per-process too. it makes consistency more and makes speed up
select_bad_process().Signed-off-by: KOSAKI Motohiro
Cc: Paul Menage
Cc: David Rientjes
Cc: KAMEZAWA Hiroyuki
Cc: Oleg Nesterov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Knowing tracepoints exist is not quite the same as knowing what they
should be used for. This patch adds a document giving a basic description
of the kmem tracepoints and why they might be useful to a performance
analyst.Signed-off-by: Mel Gorman
Cc: Rik van Riel
Reviewed-by: Ingo Molnar
Cc: Larry Woodman
Cc: Peter Zijlstra
Cc: Li Ming Chun
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
…lysis with tracepoints
The documentation for ftrace, events and tracepoints is pretty extensive.
Similarly, the perf PCL tools help files --help are there and the code
simple enough to figure out what much of the switches mean. However,
pulling the discrete bits and pieces together and translating that into
"how do I solve a problem" requires a fair amount of imagination.This patch adds a simple document intended to get someone started on the
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Rik van Riel <riel@redhat.com>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Li Ming Chun <macli@brc.ubc.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> -
This patch adds a simple post-processing script for the
page-allocator-related trace events. It can be used to give an indication
of who the most allocator-intensive processes are and how often the zone
lock was taken during the tracing period. Example output looks likeProcess Pages Pages Pages Pages PCPU PCPU PCPU Fragment Fragment MigType Fragment Fragment Unknown
details allocd allocd freed freed pages drains refills Fallback Causing Changed Severe Moderate
under lock direct pagevec drain
swapper-0 0 0 2 0 0 0 0 0 0 0 0 0 0
Xorg-3770 10603 5952 3685 6978 5996 194 192 0 0 0 0 0 0
modprobe-21397 51 0 0 86 31 1 0 0 0 0 0 0 0
xchat-5370 228 93 0 0 0 0 3 0 0 0 0 0 0
awesome-4317 32 32 0 0 0 0 32 0 0 0 0 0 0
thinkfan-3863 2 0 1 1 0 0 0 0 0 0 0 0 0
hald-addon-stor-3935 2 0 0 0 0 0 0 0 0 0 0 0 0
akregator-4506 1 1 0 0 0 0 1 0 0 0 0 0 0
xmms-14888 0 0 1 0 0 0 0 0 0 0 0 0 0
khelper-12 1 0 0 0 0 0 0 0 0 0 0 0 0Optionally, the output can include information on the parent or aggregate
based on process name instead of aggregating based on each pid. Example output
including parent information and stripped out the PID looks something like;Process Pages Pages Pages Pages PCPU PCPU PCPU Fragment Fragment MigType Fragment Fragment Unknown
details allocd allocd freed freed pages drains refills Fallback Causing Changed Severe Moderate
under lock direct pagevec drain
gdm-3756 :: Xorg-3770 3796 2976 99 3813 3224 104 98 0 0 0 0 0 0
init-1 :: hald-3892 1 0 0 0 0 0 0 0 0 0 0 0 0
git-21447 :: editor-21448 4 0 4 0 0 0 0 0 0 0 0 0 0This says that Xorg allocated 3796 pages and it's parent process is gdm
with a PID of 3756;The postprocessor parses the text output of tracing. While there is a
binary format, the expectation is that the binary output can be readily
translated into text and post-processed offline. Obviously if the text
format changes, the parser will break but the regular expression parser is
fairly rudimentary so should be readily adjustable.Signed-off-by: Mel Gorman
Cc: Rik van Riel
Reviewed-by: Ingo Molnar
Cc: Larry Woodman
Cc: Peter Zijlstra
Cc: Li Ming Chun
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The patch makes the clear_refs more versatile in adding the option to
select anonymous pages or file backed pages for clearing. This addition
has a measurable impact on user space application performance as it
decreases the number of pagewalks in scenarios where one is only
interested in a specific type of page (anonymous or file mapped).The patch adds anonymous and file backed filters to the clear_refs interface.
echo 1 > /proc/PID/clear_refs resets the bits on all pages
echo 2 > /proc/PID/clear_refs resets the bits on anonymous pages only
echo 3 > /proc/PID/clear_refs resets the bits on file backed pages onlyAny other value is ignored
Signed-off-by: Moussa A. Ba
Signed-off-by: Jared E. Hulbert
Acked-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add Documentation/vm/ksm.txt: how to use the Kernel Samepage Merging feature
Signed-off-by: Hugh Dickins
Cc: Michael Kerrisk
Cc: Randy Dunlap
Acked-by: Izik Eidus
Cc: Andrea Arcangeli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Reported-by: Christian Thaeter
Signed-off-by: Jan Kara
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove some very outdated recommendations in Documentation/memory.txt
Signed-off-by: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Attempt to clarify huge page administration and usage, and updates the
doucmentation to mention the balancing of huge pages across nodes when
allocating and freeing.Signed-off-by: Lee Schermerhorn
Cc: Mel Gorman
Cc: Nishanth Aravamudan
Cc: David Rientjes
Cc: Adam Litke
Cc: Andy Whitcroft
Cc: Eric Whitney
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We added a new column in cpuX lines of /proc/stat, to show the amount of
time spent by a cpu servicing a guest, without updating
Documentation/filesystems/proc.txtSigned-off-by: Eric Dumazet
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
…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:
kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file
tracing: Export trace_profile_buf symbols
tracing/events: use list_for_entry_continue
tracing: remove max_tracer_type_len
function-graph: use ftrace_graph_funcs directly
tracing: Remove markers
tracing: Allocate the ftrace event profile buffer dynamically
tracing: Factorize the events profile accounting -
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (222 commits)
V4L/DVB (13033): pt1: Don't use a deprecated DMA_BIT_MASK macro
V4L/DVB (13029): radio-si4713: remove #include
V4L/DVB (13027): go7007: convert printks to v4l2_info
V4L/DVB (13026): s2250-board: Implement brightness and contrast controls
V4L/DVB (13025): s2250-board: Fix memory leaks
V4L/DVB (13024): go7007: Implement vidioc_g_std and vidioc_querystd
V4L/DVB (13023): go7007: Merge struct gofh and go declarations
V4L/DVB (13022): go7007: Fix mpeg controls
V4L/DVB (13021): go7007: Fix whitespace and line lengths
V4L/DVB (13020): go7007: Updates to Kconfig and Makefile
V4L/DVB (13019): video: initial support for ADV7180
V4L/DVB (13018): kzalloc failure ignored in au8522_probe()
V4L/DVB (13017): gspca: kmalloc failure ignored in sd_start()
V4L/DVB (13016): kmalloc failure ignored in lgdt3304_attach() and s921_attach()
V4L/DVB (13015): kmalloc failure ignored in m920x_firmware_download()
V4L/DVB (13014): Add support for Compro VideoMate E800 (DVB-T part only)
V4L/DVB (13013): FM TX: si4713: Kconfig: Fixed two typos.
V4L/DVB (13012): uvc: introduce missing kfree
V4L/DVB (13011): Change tuner type of BeholdTV cards
V4L/DVB (13009): gspca - stv06xx-hdcs: Reduce exposure range
...
21 Sep, 2009
13 commits
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Some small updates, a caveat about the minorversion control interface,
and an attempt to put missing features in context.Signed-off-by: J. Bruce Fields
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Signed-off-by: Stephen Hemminger
Signed-off-by: Jiri Kosina -
Signed-off-by: Michal Sojka
Signed-off-by: Jiri Kosina -
Allows users who use an IDE driver for their disk to use hpfall without
having to modify the source. By default /dev/sda is used.
Suggested by Christian Thaeter in http://lkml.org/lkml/2009/3/25/505.While we're add it, improve error message if opening /dev/freefall fails.
Signed-off-by: Frans Pop
Cc: Christian Thaeter
Acked-by: Pavel Machek
Signed-off-by: Jiri Kosina -
Improve the example code to be at least useable, as in not causing
harm (as shown below). Code can still be improved further, but this
adds some basic safeguards.1. hpfall *MUST* mlockall(MCL_CURRENT|MCL_FUTURE); itself!
Since the Program sits and waits most of the time it becomes very likely
swapped out. If it gets woken up when the laptop drops from the table
while it is swapped out it actually triggers harddrive activity!2. Daemonize hpfall using 'daemon(0,0)' (quick and dirty).
3. Give hpfall realtime priority.
Should give a chance that it has less latency when woken up.Signed-off-by: Christian Thaeter
Signed-off-by: Frans Pop
Acked-by: Pavel Machek
Signed-off-by: Jiri Kosina -
This patch fixes a reference to step "Select e-mail destination." which
has been renumbered from 4) to 5) in linux-2.6.22.Signed-off-by: Michael Brunner
Acked-by: Randy Dunlap
Signed-off-by: Jiri Kosina -
Signed-off-by: Uwe Kleine-Koenig
Signed-off-by: Jiri Kosina -
The correct name is CONFIG_DEBUG_FS, add the missing underscore.
Signed-off-by: Marton Nemeth
Signed-off-by: Jiri Kosina -
Signed-off-by: Anand Gadiyar
Signed-off-by: Jiri Kosina -
trivial: fix typo "for for" in multiple files
Signed-off-by: Anand Gadiyar
Signed-off-by: Jiri Kosina -
The documentation for /proc/sys/kernel/* does not mention the possible
value 2 for randomize-va-space yet. While being there, doing some
reformatting, fixing grammar problems and clarifying the correlations
between randomize-va-space, kernel parameter "norandmaps" and the
CONFIG_COMPAT_BRK option.Signed-off-by: Horst Schirmeier
Signed-off-by: Jiri Kosina -
This patch makes hpfall.c conform to kernel coding style.
I have not fixed the C99 // comments on two lines as they
help indicate that those are not actually comments but
incomplete code.Before:
total: 10 errors, 6 warnings, 101 lines checked
After:
total: 2 errors, 0 warnings, 99 lines checkedSigned-off-by: Frans Pop
Acked-by: Pavel Machek
Signed-off-by: Jiri Kosina -
…/kernel/git/tip/linux-2.6-tip
* 'perfcounters-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (58 commits)
perf_counter: Fix perf_copy_attr() pointer arithmetic
perf utils: Use a define for the maximum length of a trace event
perf: Add timechart help text and add timechart to "perf help"
tracing, x86, cpuidle: Move the end point of a C state in the power tracer
perf utils: Be consistent about minimum text size in the svghelper
perf timechart: Add "perf timechart record"
perf: Add the timechart tool
perf: Add a SVG helper library file
tracing, perf: Convert the power tracer into an event tracer
perf: Add a sample_event type to the event_union
perf: Allow perf utilities to have "callback" options without arguments
perf: Store trace event name/id pairs in perf.data
perf: Add a timestamp to fork events
sched_clock: Make it NMI safe
perf_counter: Fix up swcounter throttling
x86, perf_counter, bts: Optimize BTS overflow handling
perf sched: Add --input=file option to builtin-sched.c
perf trace: Sample timestamp and cpu when using record flag
perf tools: Increase MAX_EVENT_LENGTH
perf tools: Fix memory leak in read_ftrace_printk()
...
19 Sep, 2009
9 commits
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This patch converts the existing power tracer into an event tracer,
so that power events (C states and frequency changes) can be
tracked via "perf".This also removes the perl script that was used to demo the tracer;
its functionality is being replaced entirely with timechart.Signed-off-by: Arjan van de Ven
Acked-by: Peter Zijlstra
Cc: Paul Mackerras
Cc: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar -
Adding Compro VideoMate E800 (DVB-T part only)
Cc: Steven Toth
Signed-off-by: Vladimir Geroy
Signed-off-by: Douglas Schilling Landgraf
Signed-off-by: Mauro Carvalho Chehab -
http://linuxtv.org/wiki/index.php/Zolid_Hybrid_TV_Tuner
test status analog (PAL-B):
- Sometimes picture is noisy, but it becomes crystal clear after
switching between channels. (happens for example at 687.25 Mhz)
- On a lower frequency (511.25 Mhz) the picture is always sharp, but
lacks colour.
- No sound problems.
- radio untested.Digital:
- DVB-T/H stream reception works.
- Would expect to see some more channels in the higher frequency region.Overall is the impression that sensitivity still needs improvement
both in analog and digital modes.Signed-off-by: Henk Vergonet
Signed-off-by: Mauro Carvalho Chehab -
Warn when the desired device node number is already in use, except when
the new video_register_device_no_warn function is called since in some
use-cases that warning is not relevant.Signed-off-by: Hans Verkuil
Signed-off-by: Mauro Carvalho Chehab -
The term 'kernel number' is very vague, so replace it with the somewhat more
descriptive term 'device node number'.In one place the local variable 'nr' was used to create the device node number
of the new device name. This has been replaced with the vdev->num field to
more clearly mark this as being the device node number and not the minor
number.Signed-off-by: Hans Verkuil
Signed-off-by: Mauro Carvalho Chehab -
video_register_device_index is never actually called, instead the
stream index number is always calculated automatically.This patch removes this function and simplifies the internal get_index
function since that can now always just return the first free index.Signed-off-by: Hans Verkuil
Signed-off-by: Mauro Carvalho Chehab -
Rewrite v4l2_i2c_new_subdev as a simplified version of v4l2_i2c_new_subdev_cfg
and remove v4l2_i2c_new_probed_subdev and v4l2_i2c_new_probed_subdev_addr.This simplifies this API substantially.
Signed-off-by: Hans Verkuil
Signed-off-by: Mauro Carvalho Chehab -
The initial soc-camera scaling and cropping implementation turned out to be
incompliant with the V4L2 API, e.g., it expected the user to specify cropping
in output window pixels, instead of input window pixels. This patch converts
the soc-camera core and all drivers to comply with the standard.Signed-off-by: Guennadi Liakhovetski
Signed-off-by: Mauro Carvalho Chehab -
- Add a few missing entities;
- Some text fixes at remote controllers;
- Add a missing tag at videodev2.h xml version.Signed-off-by: Mauro Carvalho Chehab
