- 22 6月, 2009 1 次提交
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由 Heiko Carstens 提交于
The slab allocator is earlier available so convert the bootmem allocations to slab/gfp allocations. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 12 6月, 2009 2 次提交
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由 Heiko Carstens 提交于
Function graph tracer support for s390. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
profile_tick is called twice for every clock comparator interrupt. The generic clock event code does it in tick_sched_timer and the s390 backend code in clock_comparator_work. That is one too many, remove the one in the arch backend code. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 22 4月, 2009 1 次提交
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由 Magnus Damm 提交于
Pass clocksource pointer to the read() callback for clocksources. This allows us to share the callback between multiple instances. [hugh@veritas.com: fix powerpc build of clocksource pass clocksource mods] [akpm@linux-foundation.org: cleanup] Signed-off-by: NMagnus Damm <damm@igel.co.jp> Acked-by: NJohn Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: NHugh Dickins <hugh@veritas.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 14 4月, 2009 3 次提交
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由 Martin Schwidefsky 提交于
Start the cpu time accounting very early to catch the cpu time spent for the initial kernel setup. To make the output of /proc/uptime match the sum of all cpu accounting values of the boot cpu reset xtime and wall_to_monotonic to sane values based on the TOD clock. The values set by timekeeping_init are off by up to a second. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
Add a read_persistent_clock function that does not just return 0. Since timekeeping_init calls the function before time_init has been called move reset_tod_clock to early.c to make sure that the TOD clock is running when read_persistent_clock is invoked. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
Add a timer that retries the clock synchronization via the server time protocol if there is a usable clock but the synchronization failed. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 26 3月, 2009 1 次提交
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由 Martin Schwidefsky 提交于
The clock sync mode flag CLOCK_SYNC_STP is not cleared when stp is set offline. In this case the get_sync_clock() function returns -EACCESS and the dasd driver will block all i/o until stp is enabled again. In addition get_sync_clock can return -EACCESS if the clock is not in sync instead of -EAGAIN. Rework the stp/etr online handling to fix these problems. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 23 1月, 2009 1 次提交
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由 Heiko Carstens 提交于
Precreate stop_machine threads in case the machine supports ETR/STP. Otherwise we might deadlock if a time sync operation gets scheduled and the creation of stop_machine threads would cause disk I/O. This is just the minimal fix. The real fix would be to only precreate stop_machine threads if ETR/STP is actually used. But that would be a rather large and complicated patch. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 25 12月, 2008 5 次提交
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由 Martin Schwidefsky 提交于
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
On s390 we always want to run with precise cputime accounting. Remove the config options VIRT_TIMER and VIRT_CPU_ACCOUNTING. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
The work function dispatched with schedule_work() can be run twice on different cpus because run_workqueue clears the WORK_STRUCT_PENDING bit and then executes the function. Another cpu can call schedule_work() again and run the work function a second time before the first call is completed. This patch serialized the etr and stp work function with a mutex. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
This converts the etr and stp code to the new stop_machine interface which allows to synchronize all cpus without allocating any memory. This way we get rid of the only reason why we haven't converted s390 to the generic IPI interface yet. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
Add a vdso to speed up gettimeofday and clock_getres/clock_gettime for CLOCK_REALTIME/CLOCK_MONOTONIC. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 13 12月, 2008 1 次提交
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由 Rusty Russell 提交于
Impact: change calling convention of existing clock_event APIs struct clock_event_timer's cpumask field gets changed to take pointer, as does the ->broadcast function. Another single-patch change. For safety, we BUG_ON() in clockevents_register_device() if it's not set. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@elte.hu>
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- 27 11月, 2008 1 次提交
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由 Christian Borntraeger 提交于
CONFIG_PRINTK_TIME reveals that sched_clock has a wrong offset during boot: .. [ 0.000000] Movable zone: 0 pages used for memmap [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 775679 [ 0.000000] Kernel command line: dasd=4b6c root=/dev/dasda1 ro noinitrd [ 0.000000] PID hash table entries: 4096 (order: 12, 32768 bytes) [6920575.975232] console [ttyS0] enabled [6920575.987586] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes) [6920575.991404] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes) .. The s390 implementation of sched_clock uses the store clock instruction and subtracts jiffies_timer_cc. jiffies_timer_cc is a local variable in arch/s390/kernel/time.c and only used for sched_clock and monotonic clock. For historical reasons there is an offset on that value. With todays code this offset is unnecessary. By removing that offset we can get a sched_clock which returns the nanoseconds after time_init. This improves CONFIG_PRINTK_TIME. Since sched_clock is the only user, I have also renamed jiffies_timer_cc to sched_clock_base_cc. In addition, the local variable init_timer_cc is redundant and can be romved as well. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 11 10月, 2008 1 次提交
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由 Martin Schwidefsky 提交于
chsc_sstpc returns -EIO on error and 0 on success but stp_reset checks against 1 instead of 0. chsc_sstpc used to return 1 on success, one call location has not been updated .. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 04 10月, 2008 1 次提交
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由 Heiko Carstens 提交于
This fixes a regression that came with 934b2857 ("[S390] nohz/sclp: disable timer on synchronous waits."). If udelay() gets called from a disabled context it sets the clock comparator to a value where it expects the next interrupt. When the interrupt happens the clock comparator gets not reset and therefore the interrupt condition doesn't get cleared. The result is an endless timer interrupt loop. In addition this patch fixes also the following: rcutorture reveals that our __udelay implementation is still buggy, since it might schedule tasklets, but prevents their execution: NOHZ: local_softirq_pending 42 NOHZ: local_softirq_pending 02 NOHZ: local_softirq_pending 142 NOHZ: local_softirq_pending 02 To fix this we make sure that only the clock comparator interrupt is enabled when the enabled wait psw is loaded. Also no code gets called anymore which might schedule tasklets. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 01 8月, 2008 1 次提交
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由 Heiko Carstens 提交于
Fix these two (false positive) warnings by adding an __init annoation: WARNING: vmlinux.o(.text+0x7e6a): Section mismatch in reference from the function stp_reset() to the function .init.text:__alloc_bootmem() The function stp_reset() references the function __init __alloc_bootmem(). This is often because stp_reset lacks a __init annotation or the annotation of __alloc_bootmem is wrong. WARNING: vmlinux.o(.text+0x7ece): Section mismatch in reference from the function stp_reset() to the function .init.text:free_bootmem() The function stp_reset() references the function __init free_bootmem(). This is often because stp_reset lacks a __init annotation or the annotation of free_bootmem is wrong. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 22 7月, 2008 1 次提交
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由 Andi Kleen 提交于
This allow to dynamically generate attributes and share show/store functions between attributes. Right now most attributes are generated by special macros and lots of duplicated code. With the attribute passed it's instead possible to attach some data to the attribute and then use that in shared low level functions to do different things. I need this for the dynamically generated bank attributes in the x86 machine check code, but it'll allow some further cleanups. I converted all users in tree to the new show/store prototype. It's a single huge patch to avoid unbisectable sections. Runtime tested: x86-32, x86-64 Compiled only: ia64, powerpc Not compile tested/only grep converted: sh, arm, avr32 Signed-off-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 16 7月, 2008 1 次提交
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由 Ingo Molnar 提交于
fix more API change fallout in recently merged upstream changes. Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 14 7月, 2008 1 次提交
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由 Martin Schwidefsky 提交于
Add support for clock synchronization with the server time protocol. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 26 6月, 2008 2 次提交
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由 Jens Axboe 提交于
It's not even passed on to smp_call_function() anymore, since that was removed. So kill it. Acked-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Reviewed-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
It's never used and the comments refer to nonatomic and retry interchangably. So get rid of it. Acked-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 17 4月, 2008 3 次提交
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由 Heiko Carstens 提交于
Most noteable part of this commit is the new local header file entry.h which contains all the function declarations of functions that get only called from asm code or are arch internal. That way we can avoid extern declarations in C files. This is more or less the same that was done for sparc64. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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由 Heiko Carstens 提交于
This way we get rid of s390's NO_IDLE_HZ and use the generic dynticks variant instead. In addition we get high resolution timers for free. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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由 Jan Glauber 提交于
Add get_clock_xt to read an 8 byte clock value using store clock extended (STCKE) and use get_clock_xt for sched_clock. STCKE should be faster than STCK on newer machines. Signed-off-by: NJan Glauber <jan.glauber@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 05 3月, 2008 1 次提交
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由 Heiko Carstens 提交于
If a machine check handling is pending when the idle loop is entered default_idle will be left with timer ticks and virtual timer disabled. Fix this by "calling" the idle_chain. Also a BUG_ON(!in_interrupt) in start_hz_timer must be removed since the function now gets called from non interrupt context as well. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 19 2月, 2008 1 次提交
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由 Heiko Carstens 提交于
Since a5fbb6d1 "KVM: fix !SMP build error" smp_call_function isn't a define anymore that folds into nothing but a define that calls up_smp_call_function with all parameters. Hence we cannot #ifdef out the unused code anymore... This seems to be the preferred method, so do this for s390 as well. arch/s390/kernel/time.c: In function 'etr_sync_clock': arch/s390/kernel/time.c:825: error: 'clock_sync_cpu_start' undeclared arch/s390/kernel/time.c:862: error: 'clock_sync_cpu_end' undeclared Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 25 1月, 2008 1 次提交
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由 Kay Sievers 提交于
All kobjects require a dynamically allocated name now. We no longer need to keep track if the name is statically assigned, we can just unconditionally free() all kobject names on cleanup. Signed-off-by: NKay Sievers <kay.sievers@vrfy.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 10 11月, 2007 1 次提交
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由 Paul Mackerras 提交于
Since powerpc started using CONFIG_GENERIC_CLOCKEVENTS, the deterministic CPU accounting (CONFIG_VIRT_CPU_ACCOUNTING) has been broken on powerpc, because we end up counting user time twice: once in timer_interrupt() and once in update_process_times(). This fixes the problem by pulling the code in update_process_times that updates utime and stime into a separate function called account_process_tick. If CONFIG_VIRT_CPU_ACCOUNTING is not defined, there is a version of account_process_tick in kernel/timer.c that simply accounts a whole tick to either utime or stime as before. If CONFIG_VIRT_CPU_ACCOUNTING is defined, then arch code gets to implement account_process_tick. This also lets us simplify the s390 code a bit; it means that the s390 timer interrupt can now call update_process_times even when CONFIG_VIRT_CPU_ACCOUNTING is turned on, and can just implement a suitable account_process_tick(). account_process_tick() now takes the task_struct * as an argument. Tested both with and without CONFIG_VIRT_CPU_ACCOUNTING. Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 05 11月, 2007 1 次提交
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由 Christian Borntraeger 提交于
The Time of Day clock is the standard time source for s390. It is - monotonic - allows very fast reading - architecture guarantees at least microsecond stepping - available as part of the architecture We should announce the rate of tod as 400 to be in sync with the description found in clocksource.h: "400-499:Perfect The ideal clocksource. A must-use where available." This change will prefer tod over less reliable clock sources. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 10 7月, 2007 1 次提交
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由 Heiko Carstens 提交于
sched-cfs-v2.6.22-git-v18.patch introduces CPU_IDLE in sched.h. This conflict with the already existing define in include/asm-s390/processor.h Just rename the s390 defines, since they will go away as soon as we support CONFIG_NO_HZ instead of our own CONFIG_NO_IDLE_HZ. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 09 5月, 2007 1 次提交
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由 Ralf Baechle 提交于
sysdev.h uses THIS_MODULE so should include <linux/module.h>. [akpm@linux-foundation.org: couple of fixes] Signed-off-by: NRalf Baechle <ralf@linux-mips.org> Cc: Andi Kleen <ak@suse.de> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 27 4月, 2007 1 次提交
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由 Martin Schwidefsky 提交于
The clock synchronization of the ETR code requires an smp_call_function to synchronize all cpus. Calling smp_call_function from a tasklet is illegal. Replace the tasklet with a job on the global workqueue. ETR work is rare and can be postponed to a be done by a kernel thread. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 21 2月, 2007 1 次提交
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由 Heiko Carstens 提交于
Force reading of *in_sync in while loop. Loops where the content that is checked for is changed by a different cpu always should have some sort of barrier() semantics. Otherwise this might lead to very subtle bugs. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 17 2月, 2007 1 次提交
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由 Thomas Gleixner 提交于
Fixup the is_contionous replacement by a flag field. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NIngo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 06 2月, 2007 3 次提交
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由 Heiko Carstens 提交于
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
This patch adds support for clock synchronization to an external time reference (ETR). The external time reference sends an oscillator signal and a synchronization signal every 2^20 microseconds to keep the TOD clocks of all connected servers in sync. For availability two ETR units can be connected to a machine. If the clock deviates for more than the sync-check tolerance all cpus get a machine check that indicates that the clock is out of sync. For the lovely details how to get the clock back in sync see the code below. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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