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2007-07-09sched: scheduler debugging, enable in KconfigIngo Molnar1-0/+9
enable CONFIG_SCHED_DEBUG in lib/Kconfig.debug. the runtime overhead of this option is very small. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: scheduler debugging, coreIngo Molnar3-0/+364
scheduler debugging core: implement /proc/sched_debug and /proc/<PID>/sched files for scheduler debugging. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add CFS debug sysctlsIngo Molnar1-0/+80
add CFS debug sysctls: only tweakable if SCHED_DEBUG is enabled. This allows for faster debugging of scheduler problems. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove old cpu accounting fieldIngo Molnar1-1/+0
remove the old cpu-accounting field from signal_struct, now that the code is using CFS's stats. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove unused rq types from sched.cIngo Molnar1-16/+0
remove unused rq types from sched.c, now that we switched over to CFS. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove batch_task()Ingo Molnar1-5/+0
batch_task() in sched.h is now unused - remove it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove interactivity types from sched.hIngo Molnar1-7/+2
remove now-unused types/fields used by the old scheduler. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove interactivity typesIngo Molnar1-89/+12
remove now unused interactivity-heuristics related defined and types of the old scheduler. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: clean up include files in sched.cIngo Molnar1-2/+2
clean up include files in sched.c, they were still old-style <asm/>. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: clean up fastcall uses of sched_fork()/sched_exit()Ingo Molnar1-2/+2
sched_fork()/sched_exit() does not need to specify fastcall anymore, as the x86 kernel defaults to regparm3, and no assembly code calls these functions. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: update delay-accounting to use CFS's precise statsBalbir Singh6-15/+15
update delay-accounting to use CFS's precise stats. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 <balbir@linux.vnet.ibm.com> Dmitry Adamushko <dmitry.adamushko@gmail.com> Ingo Molnar <mingo@elte.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
2007-07-09sched: turn on the use of unstable eventsIngo Molnar1-7/+14
make use of sched-clock-unstable events. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: x86, track TSC-unstable eventsIngo Molnar3-1/+17
track TSC-unstable events and propagate it to the scheduler code. Also allow sched_clock() to be used when the TSC is unstable, the rq_clock() wrapper creates a reliable clock out of it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs core codeIngo Molnar1-774/+758
apply the CFS core code. this change switches over the scheduler core to CFS's modular design and makes use of kernel/sched_fair/rt/idletask.c to implement Linux's scheduling policies. thanks to Andrew Morton and Thomas Gleixner for lots of detailed review feedback and for fixlets. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com> Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
2007-07-09sched: remove the sleep-bonus interactivity codeIngo Molnar1-46/+1
remove the sleep-bonus interactivity code from the core scheduler. scheduling policy is implemented in the policy modules, and CFS does not need such type of heuristics. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove expired_starving()Ingo Molnar1-22/+1
remove the expired_starving() heuristics from the core scheduler. CFS does not need it, and this did not really work well in practice anyway, due to the rq->nr_running multiplier to STARVATION_LIMIT. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove sleep_typeIngo Molnar2-97/+2
remove the sleep_type heuristics from the core scheduler - scheduling policy is implemented in the scheduling-policy modules. (and CFS does not use this type of sleep-type heuristics) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs, add load-calculation methodsIngo Molnar1-18/+120
add the new load-calculation methods of CFS. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: clean up __normal_prio() positionIngo Molnar1-29/+29
clean up: move __normal_prio() in head of normal_prio(). no code changed. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cleanup: move dequeue/enqueue_task()Ingo Molnar1-38/+38
cleanup: move dequeue/enqueue_task() to a more logical place, to not split up __normal_prio()/normal_prio(). Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: move around resched_task()Ingo Molnar1-52/+52
move resched_task()/resched_cpu() into the 'public interfaces' section of sched.c, for use by kernel/sched_fair/rt/idletask.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 <mingo@elte.hu>
2007-07-09sched: clean up the rt priority macrosIngo Molnar3-31/+54
clean up the rt priority macros, pointed out by Andrew Morton. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add cfs_rq opsIngo Molnar1-0/+12
add the set_task_cfs_rq() abstraction needed by CONFIG_FAIR_GROUP_SCHED. (not activated yet) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: make posix-cpu-timers use CFS's accounting informationIngo Molnar3-42/+33
update the posix-cpu-timers code to use CFS's CPU accounting information. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add rq_clock()/__rq_clock()Ingo Molnar1-0/+46
add rq_clock()/__rq_clock(), a robust wrapper around sched_clock(), used by CFS. It protects against common type of sched_clock() problems (caused by hardware): time warps forwards and backwards. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs rq data typesIngo Molnar1-6/+78
add the CFS rq data types to sched.c. (the old scheduler fields are still intact, they are removed by a later patch) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs, core data typesIngo Molnar1-0/+82
add the CFS data types to sched.h. (the old scheduler is still fully intact.) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs core, kernel/sched_idletask.cIngo Molnar1-0/+71
add kernel/sched_idletask.c - which implements the idle thread scheduling class. This further simplifies sched.c (under CFS), for example a number of 'if (p == rq->idle)' type of special-cases can be removed from sched.c, and schedule() gets simpler too. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs core, kernel/sched_rt.cIngo Molnar1-0/+255
add kernel/sched_rt.c: SCHED_FIFO/SCHED_RR support. The behavior and semantics of SCHED_FIFO/SCHED_RR tasks is unchanged. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs core, kernel/sched_fair.cIngo Molnar2-0/+1139
add kernel/sched_fair.c - which implements the bulk of CFS's behavioral changes for SCHED_OTHER tasks. see Documentation/sched-design-CFS.txt about details. Authors: Ingo Molnar <mingo@elte.hu> Dmitry Adamushko <dmitry.adamushko@gmail.com> Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Mike Galbraith <efault@gmx.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com> Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
2007-07-09sched: increase the resolution of smpniceIngo Molnar1-1/+8
increase SMP-nice's resolution. This is needed by CFS to implement SCHED_IDLE and cleaned up nice level support. no behavioral changes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: move code into kernel/sched_stats.hIngo Molnar2-233/+236
create sched_stats.h and move sched.c schedstats code into it. This cleans up sched.c a bit. no code changes are caused by this patch. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add init_idle_bootup_task()Ingo Molnar3-2/+9
add the init_idle_bootup_task() callback to the bootup thread, unused at the moment. (CFS will use it to switch the scheduling class of the boot thread to the idle class) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add in_atomic_preempt_off()Ingo Molnar1-0/+13
add in_atomic_preempt_off() - debugging helper that will simplify schedule(). Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove sched_exit()Ingo Molnar2-32/+0
remove sched_exit(): the elaborate dance of us trying to recover timeslices given to child tasks never really worked. CFS does not need it either. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: uninline set_task_cpu()Ingo Molnar2-4/+7
uninline set_task_cpu(): CFS will add more code to it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: zap the migration init / cache-hot balancing codeIngo Molnar8-596/+0
the SMP load-balancer uses the boot-time migration-cost estimation code to attempt to improve the quality of balancing. The reason for this code is that the discrete priority queues do not preserve the order of scheduling accurately, so the load-balancer skips tasks that were running on a CPU 'recently'. this code is fundamental fragile: the boot-time migration cost detector doesnt really work on systems that had large L3 caches, it caused boot delays on large systems and the whole cache-hot concept made the balancing code pretty undeterministic as well. (and hey, i wrote most of it, so i can say it out loud that it sucks ;-) under CFS the same purpose of cache affinity can be achieved without any special cache-hot special-case: tasks are sorted in the 'timeline' tree and the SMP balancer picks tasks from the left side of the tree, thus the most cache-cold task is balanced automatically. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add SCHED_IDLE policyIngo Molnar1-0/+2
this patch adds the SCHED_IDLE policy to sched.h. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: rename idle_type/SCHED_IDLEIngo Molnar2-44/+43
enum idle_type (used by the load-balancer) clashes with the SCHED_IDLE name that we want to introduce. 'CPU_IDLE' instead of 'SCHED_IDLE' is more descriptive as well. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09Linux 2.6.22v2.6.22Linus Torvalds1-1/+1
Woo-hoo. I'm sure somebody will report a "this doesn't compile, and I have a new root exploit" five minutes after release, but it still feels good ;) Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-08Merge master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds3-2/+3
* master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6: qd65xx: fix PIO mode selection sis5513: adding PCI-ID
2007-07-08Fix permission checking for the new utimensat() system callLinus Torvalds1-3/+10
Commit 1c710c896eb461895d3c399e15bb5f20b39c9073 added the utimensat() system call, but didn't handle the case of checking for the writability of the target right, when the target was a file descriptor, not a filename. We cannot use vfs_permission(MAY_WRITE) for that case, and need to simply check whether the file descriptor is writable. The oops from using the wrong function was noticed and narrowed down by Markus Trippelsdorf. Cc: Ulrich Drepper <drepper@redhat.com> Cc: Markus Trippelsdorf <markus@trippelsdorf.de> Cc: Andrew Morton <akpm@linux-foundation.org> Acked-by: Al Viro <viro@ftp.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-08mm: double mark_page_accessed() in read_cache_page_async()Peter Zijlstra1-1/+0
Fix a post-2.6.21 regression. read_cache_page_async() has two invocations of mark_page_accessed() which will launch pages right onto the active list. Remove the first one, keeping the latter one. This avoids marking unwanted pages active (in the retry loop). Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-08qd65xx: fix PIO mode selectionBartlomiej Zolnierkiewicz1-2/+1
PIO4 is a maximum PIO mode supported by a driver. Using "255" as a max_mode argument to ide_get_best_pio_mode() could result in wrong timings being used by a driver (for "pio" equal to 5) or OOPS (for "pio" values > 5 && < 255). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Reviewed-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
2007-07-08sis5513: adding PCI-IDUwe Koziolek2-0/+2
The SiS966 has one additional PCI-ID 1180. If the chipset is using this PCI-ID, the primary channel is connected to the first PATA-port. The secondary channel is connected to SATA-ports in IDE emulation mode. The legacy IO-ports are used. The including of the PCI-ID into pata_sis is not sufficient, because the legacy driver in drivers/ide is initialized before pata_sis. Signed-off-by: Uwe Koziolek <uwe.koziolek@gmx.net> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-07-08DLM must depend on SYSFSAdrian Bunk1-1/+1
The dependency of DLM on SYSFS got lost in commit 6ed7257b46709e87d79ac2b6b819b7e0c9184998 resulting in the following compile error with CONFIG_DLM=y, CONFIG_SYSFS=n: <-- snip --> ... LD .tmp_vmlinux1 fs/built-in.o: In function `dlm_lockspace_init': /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/fs/dlm/lockspace.c:231: undefined reference to `kernel_subsys' fs/built-in.o: In function `configfs_init': /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/fs/configfs/mount.c:143: undefined reference to `kernel_subsys' make[1]: *** [.tmp_vmlinux1] Error 1 <-- snip --> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-08Clean up E7520/7320/7525 quirk printk.Dave Jones1-3/+2
The printk level in this printk is bogus, as the previous printk didn't have a terminating \n resulting in .. Intel E7520/7320/7525 detected.<6>Disabling irq balancing and affinity It also never printed a \n at all in the case where we didn't do the quirk. Change it to only make noise if it actually does something useful. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-08include/linux/kallsyms.h must #include <linux/errno.h>Adrian Bunk1-0/+1
This patch fixes the following 2.6.22 regression with CONFIG_KALLSYMS=n: <-- snip --> ... CC arch/m32r/kernel/traps.o In file included from /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/arch/m32r/kernel/traps.c:14: /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h: In function 'lookup_symbol_name': /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h:66: error: 'ERANGE' undeclared (first use in this function) /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h:66: error: (Each undeclared identifier is reported only once /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h:66: error: for each function it appears in.) /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h: In function 'lookup_symbol_attrs': /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h:71: error: 'ERANGE' undeclared (first use in this function) make[2]: *** [arch/m32r/kernel/traps.o] Error 1 <-- snip --> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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