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2007-10-19pid namespaces: round up the APIPavel Emelianov1-2/+2
The set of functions process_session, task_session, process_group and task_pgrp is confusing, as the names can be mixed with each other when looking at the code for a long time. The proposals are to * equip the functions that return the integer with _nr suffix to represent that fact, * and to make all functions work with task (not process) by making the common prefix of the same name. For monotony the routines signal_session() and set_signal_session() are replaced with task_session_nr() and set_task_session(), especially since they are only used with the explicit task->signal dereference. Signed-off-by: Pavel Emelianov <[email protected]> Acked-by: Serge E. Hallyn <[email protected]> Cc: Kirill Korotaev <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Cc: Cedric Le Goater <[email protected]> Cc: Herbert Poetzl <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-19sched: fix guest time accounting going faster than user time accountingChristian Borntraeger1-1/+1
cputime_add already adds, dont do it twice. Signed-off-by: Christian Borntraeger <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2007-10-15sched: guest CPU accounting: add guest-CPU /proc/<pid>/stat fieldsLaurent Vivier1-2/+15
like for cpustat, introduce the "gtime" (guest time of the task) and "cgtime" (guest time of the task children) fields for the tasks. Modify signal_struct and task_struct. Modify /proc/<pid>/stat to display these new fields. Signed-off-by: Laurent Vivier <[email protected]> Acked-by: Avi Kivity <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2007-08-23sched: accounting regression since rc1Christian Borntraeger1-15/+29
Fix the accounting regression for CONFIG_VIRT_CPU_ACCOUNTING. It reverts parts of commit b27f03d4bdc145a09fb7b0c0e004b29f1ee555fa by converting fs/proc/array.c back to cputime_t. The new functions task_utime and task_stime now return cputime_t instead of clock_t. If CONFIG_VIRT_CPU_ACCOUTING is set, task->utime and task->stime are returned directly instead of using sum_exec_runtime. Patch is tested on s390x with and without VIRT_CPU_ACCOUTING as well as on i386. [ [email protected]: cleanups, comments. ] Signed-off-by: Christian Borntraeger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2007-07-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-schedLinus Torvalds1-27/+26
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: [PATCH] sched: fix up fs/proc/array.c whitespace problems [PATCH] sched: prettify prio_to_wmult[] [PATCH] sched: document prio_to_wmult[] [PATCH] sched: improve weight-array comments [PATCH] sched: remove dead code from task_stime() Fixed up trivial conflict in fs/proc/array.c
2007-07-16taskstats: add context-switch countersMaxim Uvarov1-0/+10
Make available to the user the following task and process performance statistics: * Involuntary Context Switches (task_struct->nivcsw) * Voluntary Context Switches (task_struct->nvcsw) Statistics information is available from: 1. taskstats interface (Documentation/accounting/) 2. /proc/PID/status (task only). This data is useful for detecting hyperactivity patterns between processes. [[email protected]: cleanup] Signed-off-by: Maxim Uvarov <[email protected]> Cc: Shailabh Nagar <[email protected]> Cc: Balbir Singh <[email protected]> Cc: Jay Lan <[email protected]> Cc: Jonathan Lim <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-16Use boot based time for process start time and boot time in /procTomas Janousek1-2/+3
Commit 411187fb05cd11676b0979d9fbf3291db69dbce2 caused boot time to move and process start times to become invalid after suspend. Using boot based time for those restores the old behaviour and fixes the issue. [[email protected]: little cleanup] Signed-off-by: Tomas Janousek <[email protected]> Cc: Tomas Smetana <[email protected]> Acked-by: John Stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-16[PATCH] sched: fix up fs/proc/array.c whitespace problemsIngo Molnar1-26/+25
while changing task_stime() i noticed a whitespace style problem in array.c - fix it. While at it, fix all the other style problems too, most of them in the scheduler-stats related portions of array.c. There is no change in functionality: text data bss dec hex filename 4356 28 0 4384 1120 array.o-before 4356 28 0 4384 1120 array.o-after Signed-off-by: Ingo Molnar <[email protected]>
2007-07-16[PATCH] sched: remove dead code from task_stime()Ingo Molnar1-1/+1
Alexey Dobriyan noticed that task_stime() contains a piece of dead code. (which is a remnant of earlier versions of this code) Remove that code. Signed-off-by: Ingo Molnar <[email protected]>
2007-07-09sched: make use of precise accounting for /proc task statsIngo Molnar1-10/+47
make use of CFS's precise accounting to drive /proc/<pid>/stat statistics. this code was co-authored by: Balbir Singh <[email protected]> Dmitry Adamushko <[email protected]> Ingo Molnar <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Dmitry Adamushko <[email protected]>
2007-07-09sched: remove the SleepAVG fieldIngo Molnar1-2/+0
remove the SleepAVG field from /proc/<pid>/status, as with the removal of the sleep-average code this value no longer makes sense. Signed-off-by: Ingo Molnar <[email protected]>
2007-05-08reduce size of task_struct on 64-bit machinesWilliam Cohen1-2/+2
This past week I was playing around with that pahole tool (http://oops.ghostprotocols.net:81/acme/dwarves/) and looking at the size of various struct in the kernel. I was surprised by the size of the task_struct on x86_64, approaching 4K. I looked through the fields in task_struct and found that a number of them were declared as "unsigned long" rather than "unsigned int" despite them appearing okay as 32-bit sized fields. On x86_64 "unsigned long" ends up being 8 bytes in size and forces 8 byte alignment. Is there a reason there a reason they are "unsigned long"? The patch below drops the size of the struct from 3808 bytes (60 64-byte cachelines) to 3760 bytes (59 64-byte cachelines). A couple other fields in the task struct take a signficant amount of space: struct thread_struct thread; 688 struct held_lock held_locks[30]; 1680 CONFIG_LOCKDEP is turned on in the .config [[email protected]: fix printk warnings] Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-02-12[PATCH] tty: update the tty layer to work with struct pidEric W. Biederman1-1/+1
Of kernel subsystems that work with pids the tty layer is probably the largest consumer. But it has the nice virtue that the assiation with a session only lasts until the session leader exits. Which means that no reference counting is required. So using struct pid winds up being a simple optimization to avoid hash table lookups. In the long term the use of pid_nr also ensures that when we have multiple pid spaces mixed everything will work correctly. Signed-off-by: Eric W. Biederman <[email protected]> Cc: Alan Cox <[email protected]> Cc: Oleg Nesterov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-12-08[PATCH] add process_session() helper routine: deprecate old fieldCedric Le Goater1-1/+1
Add an anonymous union and ((deprecated)) to catch direct usage of the session field. [[email protected]: fix various missed conversions] [[email protected]: fix UML bug] Signed-off-by: Jeff Dike <[email protected]> Cc: Cedric Le Goater <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-12-08[PATCH] do_task_stat(): don't take tty_mutexOleg Nesterov1-12/+4
->signal->tty is protected by ->siglock, no need to take the global tty_mutex. Signed-off-by: Oleg Nesterov <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Cc: Alan Cox <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-10-02[PATCH] proc: drop tasklist lock in task_state()Oleg Nesterov1-6/+5
task_state() needs tasklist_lock to protect ->parent/->real_parent. However task->parent points to nowhere only when the actions below happen in order 1) release_task(task) 2) release_task(task->parent) 3) a grace period passed But 3) implies that the memory ops from 1) should be finished, so pid_alive() can't be true in such a case. Otherwise, we don't care if ->parent/->real_parent changes under us. Signed-off-by: Oleg Nesterov <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-10-02[PATCH] proc: convert do_task_stat() to use lock_task_sighand()Oleg Nesterov1-28/+35
Drop tasklist_lock. ->siglock protects almost all interesting data (including sub-threads traversal) except: ->signal->tty protected by tty_mutex ->real_parent the task can't be unhashed while we are holding ->siglock, so ->real_parent can change from under us but we can safely dereference it under rcu_read_lock() ->pgrp/->session we can get inconsistent numbers if the task does sys_setsid/daemonize at the same time. I hope this is acceptable. Signed-off-by: Oleg Nesterov <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-10-02[PATCH] proc: convert task_sig() to use lock_task_sighand()Oleg Nesterov1-6/+5
lock_task_sighand() can take ->siglock without holding tasklist_lock. Signed-off-by: Oleg Nesterov <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-09-29[PATCH] tty: stop the tty vanishing under procfs accessAlan Cox1-0/+3
Signed-off-by: Alan Cox <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-07-14[PATCH] per-task-delay-accounting: /proc export of aggregated block I/O delaysShailabh Nagar1-2/+4
Export I/O delays seen by a task through /proc/<tgid>/stats for use in top etc. Note that delays for I/O done for swapping in pages (swapin I/O) is clubbed together with all other I/O here (this is not the case in the netlink interface where the swapin I/O is kept distinct) [[email protected]: printk warning fix] Signed-off-by: Shailabh Nagar <[email protected]> Signed-off-by: Balbir Singh <[email protected]> Cc: Jes Sorensen <[email protected]> Cc: Peter Chubb <[email protected]> Cc: Erich Focht <[email protected]> Cc: Levent Serinol <[email protected]> Cc: Jay Lan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel1-1/+0
Signed-off-by: Jörn Engel <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2006-03-26[PATCH] hrtimers: remove it_real_value calculation from proc/*/statRoman Zippel1-4/+1
Remove the it_real_value from /proc/*/stat, during 1.2.x was the last time it returned useful data (as it was directly maintained by the scheduler), now it's only a waste of time to calculate it. Return 0 instead. Signed-off-by: Roman Zippel <[email protected]> Acked-by: Ingo Molnar <[email protected]> Acked-by: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: switch itimers to hrtimerThomas Gleixner1-3/+3
switch itimers to a hrtimers-based implementation Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-06[PATCH] s390: cleanup KconfigMartin Schwidefsky1-1/+1
Sanitize some s390 Kconfig options. We have ARCH_S390, ARCH_S390X, ARCH_S390_31, 64BIT, S390_SUPPORT and COMPAT. Replace these 6 options by S390, 64BIT and COMPAT. Signed-off-by: Martin Schwidefsky <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2005-10-29[PATCH] mm: rss = file_rss + anon_rssHugh Dickins1-1/+1
I was lazy when we added anon_rss, and chose to change as few places as possible. So currently each anonymous page has to be counted twice, in rss and in anon_rss. Which won't be so good if those are atomic counts in some configurations. Change that around: keep file_rss and anon_rss separately, and add them together (with get_mm_rss macro) when the total is needed - reading two atomics is much cheaper than updating two atomics. And update anon_rss upfront, typically in memory.c, not tucked away in page_add_anon_rmap. Signed-off-by: Hugh Dickins <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2005-09-17[PATCH] files: fix preemption issuesDipankar Sarma1-0/+3
With the new fdtable locking rules, you have to protect fdtable with either ->file_lock or rcu_read_lock/unlock(). There are some places where we aren't doing either. This patch fixes those places. Signed-off-by: Dipankar Sarma <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2005-09-09[PATCH] files: break up files structDipankar Sarma1-1/+4
In order for the RCU to work, the file table array, sets and their sizes must be updated atomically. Instead of ensuring this through too many memory barriers, we put the arrays and their sizes in a separate structure. This patch takes the first step of putting the file table elements in a separate structure fdtable that is embedded withing files_struct. It also changes all the users to refer to the file table using files_fdtable() macro. Subsequent applciation of RCU becomes easier after this. Signed-off-by: Dipankar Sarma <[email protected]> Signed-Off-By: David Howells <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2005-04-16Linux-2.6.12-rc2Linus Torvalds1-0/+484
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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