Messages in this thread | | | Date | Mon, 7 Oct 2019 18:51:41 +0200 | From | Frederic Weisbecker <> | Subject | Re: [PATCH 0/2] vtime: Remove pair of seqcount on context switch |
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On Mon, Oct 07, 2019 at 06:20:31PM +0200, Ingo Molnar wrote: > > * Frederic Weisbecker <frederic@kernel.org> wrote: > > > Extracted from a larger queue that fixes kcpustat on nohz_full, these > > two patches have value on their own as they remove two write barriers > > on nohz_full context switch. > > > > Frederic Weisbecker (2): > > vtime: Rename vtime_account_system() to vtime_account_kernel() > > vtime: Spare a seqcount lock/unlock cycle on context switch > > > > arch/ia64/kernel/time.c | 4 +-- > > arch/powerpc/kernel/time.c | 6 ++-- > > arch/s390/kernel/vtime.c | 4 +-- > > include/linux/context_tracking.h | 4 +-- > > include/linux/vtime.h | 38 ++++++++++++------------ > > kernel/sched/cputime.c | 50 ++++++++++++++++++-------------- > > 6 files changed, 57 insertions(+), 49 deletions(-) > > Which tree is this against? Doesn't apply cleanly to v5.4-rc2 nor v5.3. > Does it have any prereqs perhaps?
Indeed, you need to apply this fix first: https://lore.kernel.org/lkml/20190925214242.21873-1-frederic@kernel.org/
"[PATCH] sched/vtime: Fix guest/system mis-accounting on task switch"
Thanks!
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