- 01 Feb, 2017 32 commits
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Frederic Weisbecker authored
There is no need anymore for this cputime_t midlayer. Let's use nsec units directly. Signed-off-by:
Frederic Weisbecker <fweisbec@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Wanpeng Li <wanpeng.li@hotmail.com> Link: http://lkml.kernel.org/r/1485832191-26889-30-git-send-email-fweisbec@gmail.comSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Frederic Weisbecker authored
Initially, nsec based cputime_t implementation belonged to IA64. It got exported later for CONFIG_VIRT_CPU_ACCOUNTING_GEN but now it is again only used by IA64. So let's move it back there. Signed-off-by:
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Frederic Weisbecker authored
This cputime_t implementation is now unused, we can remove it. Signed-off-by:
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Frederic Weisbecker authored
Turn the full dynticks cputime clock source to return nsec while keeping its very internals jiffies based for performance reasons. Signed-off-by:
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Frederic Weisbecker authored
This is the final step toward tick based cputime conversion. Now that the whole cputime accounting engine accounts in nsecs, we can convert the very source of the cputime to account in nsecs. Signed-off-by:
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Frederic Weisbecker authored
This is one more step toward converting cputime accounting to pure nsecs. Signed-off-by:
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Frederic Weisbecker authored
This is one more step toward converting cputime accounting to pure nsecs. Signed-off-by:
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Frederic Weisbecker authored
This is one more step toward converting cputime accounting to pure nsecs. Signed-off-by:
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Frederic Weisbecker authored
This is one more step toward converting cputime accounting to pure nsecs. Signed-off-by:
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Frederic Weisbecker authored
Now that the whole cputime conversion to nsec units is complete, we can remove the compatibility accessors. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Also convert itimers to use nsec based internal counters. This simplifies it and removes the whole game with error/inc_error which served to deal with cputime_t random granularity. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Also convert posix-cpu-timers to use nsec based internal counters to simplify it. Signed-off-by:
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Frederic Weisbecker authored
Signed-off-by:
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Frederic Weisbecker authored
The irqtime is accounted is nsecs and stored in cpu_irq_time.hardirq_time and cpu_irq_time.softirq_time. Once the accumulated amount reaches a new jiffy, this one gets accounted to the kcpustat. This was necessary when kcpustat was stored in cputime_t, which could at worst have jiffies granularity. But now kcpustat is stored in nsecs so this whole discretization game with temporary irqtime storage has become unnecessary. We can now directly account the irqtime to the kcpustat. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Signed-off-by:
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Frederic Weisbecker authored
Not sure if MISDN stats are ABI but it displays task cputime in cputime_t raw value regardless of what type cputime_t wraps which could be either jiffies, nsecs, usecs, or whatever random time unit. Plus it wrongly assumes that cputime_t is long. Given that this dump is broken anyway, lets just display the nanosec value and stick with that. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Signed-off-by:
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Frederic Weisbecker authored
Use the new nsec based cputime accessors as part of the whole cputime conversion from cputime_t to nsecs. Signed-off-by:
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Frederic Weisbecker authored
Now that most cputime readers use the transition API which return the task cputime in old style cputime_t, we can safely store the cputime in nsecs. This will eventually make cputime statistics less opaque and more granular. Back and forth convertions between cputime_t and nsecs in order to deal with cputime_t random granularity won't be needed anymore. Signed-off-by:
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Frederic Weisbecker authored
This API returns a task's cputime in cputime_t in order to ease the conversion of cputime internals to use nsecs units instead. Blindly converting all cputime readers to use this API now will later let us convert more smoothly and step by step all these places to use the new nsec based cputime. Signed-off-by:
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Frederic Weisbecker authored
cputime_t is being obsolete and replaced by nsecs units in order to make internal timestamps less opaque and more granular. Signed-off-by:
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Frederic Weisbecker authored
cputime_t is going to be removed and replaced by nsecs units, so convert the drivers/macintosh/rack-meter.c use to u64.. Signed-off-by:
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Frederic Weisbecker authored
Kernel CPU stats are stored in cputime_t which is an architecture defined type, and hence a bit opaque and requiring accessors and mutators for any operation. Converting them to nsecs simplifies the code and is one step toward the removal of cputime_t in the core code. Signed-off-by:
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Frederic Weisbecker authored
It's a leftover from removed code. Signed-off-by:
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Frederic Weisbecker authored
This will be needed for the cputime_t to nsec conversion. Signed-off-by:
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Frederic Weisbecker authored
NSEC_PER_JIFFY is an ad-hoc redefinition of TICK_NSEC. Let's rather use a unique and well maintained version. Signed-off-by:
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Ingo Molnar authored
Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull tracing fix from Steven Rostedt: "It was reported to me that the thread created by the hwlat tracer does not migrate after the first instance. I found that there was as small bug in the logic, and fixed it. It's minor, but should be fixed regardless. There's not much impact outside the hwlat tracer" * tag 'trace-4.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Fix hwlat kthread migration
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- 31 Jan, 2017 8 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds authored
Pull input subsystem fixes from Dmitry Torokhov: "A fix for a crash in the wm97xx driver and synaptics-rmi4 will stop throwing erroneous warnings." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: synaptics-rmi4 - fix reversed conditions in enable/disable_irq_wake Input: wm97xx - make missing platform data non-fatal
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroupLinus Torvalds authored
Pull cgroup fix from Tejun Heo: "The cgroup creation path was getting the order of operations wrong and exposing cgroups which don't have their names set yet to controllers which can lead to NULL derefs. This contains the fix for the bug" * 'for-4.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: don't online subsystems before cgroup_name/path() are operational
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpuLinus Torvalds authored
Pull percpu fix from Tejun Heo: "Douglas found and fixed a ref leak bug in percpu_ref_tryget[_live](). The bug is caused by storing the return value of atomic_long_inc_not_zero() into an int temp variable before returning it as a bool. The interim cast to int loses the upper bits and can lead to false negatives. As percpu_ref uses a high bit to mark a draining counter, this can happen relatively easily. Fixed by using bool for the temp variable" * 'for-4.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu-refcount: fix reference leak during percpu-atomic transition
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libataLinus Torvalds authored
Pull libata fixes from Tejun Heo: "Three libata fixes: an error handling fix, blacklist addition for another fallout from upping the default max sectors, and fix for a sense data reporting bug which affects new harddrives which can report sense data" * 'for-4.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: ata: sata_mv:- Handle return value of devm_ioremap. libata: Fix ATA request sense libata: apply MAX_SEC_1024 to all CX1-JB*-HP devices
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hidLinus Torvalds authored
Pull HID fixes from Jiri Kosina: - regression fix (sleeping while atomic) for cp2112, from Johan Hovold - regression fix for proximity handling under certain circumstances in Wacom driver, from Jason Gerecke - functional fix for Logitech Rumblepad 2, from Ardinartsev Nikita * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: cp2112: fix gpio-callback error handling HID: cp2112: fix sleep-while-atomic HID: hid-lg: Fix immediate disconnection of Logitech Rumblepad 2 HID: usbhid: Quirk a AMI virtual mouse and keyboard with ALWAYS_POLL HID: wacom: Fix poor prox handling in 'wacom_pl_irq'
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git://git.samba.org/sfrench/cifs-2.6Linus Torvalds authored
Pull cifs fix from Steve French: "A small cifs fix for stable" * 'for-next' of git://git.samba.org/sfrench/cifs-2.6: cifs: initialize file_info_lock
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Steven Rostedt (VMware) authored
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org>
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Johan Hovold authored
In case of a zero-length report, the gpio direction_input callback would currently return success instead of an errno. Fixes: 1ffb3c40 ("HID: cp2112: make transfer buffers DMA capable") Cc: stable <stable@vger.kernel.org> # 4.9 Signed-off-by:
Johan Hovold <johan@kernel.org> Reviewed-by:
Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz>
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