timekeeping: Shorten seq_count region

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Shorten the seqcount write hold region to the actual update of the
timekeeper and the related data (e.g vsyscall).

On a contemporary x86 system this reduces the maximum latencies on
Preempt-RT from 8us to 4us on the non-timekeeping cores.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

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Thomas Gleixner 2013-02-21 22:51:40 +00:00 • committed by John Stultz

parent 48cdc135d4

commit ca4523cda4

1 changed files with 2 additions and 3 deletions

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kernel/time/timekeeping.c

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