From: Peter Zijlstra <peterz@infradead.org>
To: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: linux-kernel@vger.kernel.org, Rik van Riel <riel@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Oleg Nesterov <oleg@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH v2] sched/cputime: fix clock_nanosleep/clock_gettime inconsistency
Date: Wed, 12 Nov 2014 17:56:10 +0100 [thread overview]
Message-ID: <20141112165610.GO29390@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20141112155843.GA24803@redhat.com>
On Wed, Nov 12, 2014 at 04:58:44PM +0100, Stanislaw Gruszka wrote:
> Commit d670ec13178d0 "posix-cpu-timers: Cure SMP wobbles" fixes one glibc
> test case in cost of breaking another one. After that commit, calling
> clock_nanosleep(TIMER_ABSTIME, X) and then clock_gettime(&Y) can result
> of Y time being smaller than X time.
>
> Below is full reproducer (tst-cpuclock2.c) :
>
> /* Parameters for the Linux kernel ABI for CPU clocks. */
> ((~(clockid_t) (pid) << 3) | (clockid_t) (clock))
>
You lost all the #include and #define stmts there, restored them from
the previous posting.
next prev parent reply other threads:[~2014-11-12 16:56 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-12 10:29 [PATCH] sched/cputime: fix clock_nanosleep/clock_gettime inconsistency Stanislaw Gruszka
2014-11-12 11:15 ` Peter Zijlstra
2014-11-12 11:37 ` Peter Zijlstra
2014-11-12 11:45 ` Peter Zijlstra
2014-11-12 12:27 ` Stanislaw Gruszka
2014-11-12 12:52 ` Peter Zijlstra
2014-11-16 9:50 ` [tip:sched/urgent] sched/cputime: Fix cpu_timer_sample_group() double accounting tip-bot for Peter Zijlstra
2014-11-12 12:21 ` [PATCH] sched/cputime: fix clock_nanosleep/clock_gettime inconsistency Stanislaw Gruszka
2014-11-12 12:51 ` Peter Zijlstra
2014-11-12 15:58 ` [PATCH v2] " Stanislaw Gruszka
2014-11-12 16:06 ` Peter Zijlstra
2014-11-12 16:17 ` Stanislaw Gruszka
2014-11-12 17:12 ` Peter Zijlstra
2014-11-12 16:45 ` Peter Zijlstra
2014-11-12 16:53 ` Stanislaw Gruszka
2014-11-12 16:56 ` Peter Zijlstra [this message]
2014-11-16 9:50 ` [tip:sched/urgent] sched/cputime: Fix clock_nanosleep()/ clock_gettime() inconsistency tip-bot for Stanislaw Gruszka
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