From: Frederic Weisbecker <frederic@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
John Stultz <jstultz@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
Eric Biederman <ebiederm@xmission.com>,
Oleg Nesterov <oleg@redhat.com>
Subject: Re: [patch 17/45] posix-cpu-timers: Make k_itimer::it_active consistent
Date: Tue, 4 Jul 2023 00:30:46 +0200 [thread overview]
Message-ID: <ZKNMFv7VTIaTTJwe@lothringen> (raw)
In-Reply-To: <20230606142031.983662966@linutronix.de>
On Tue, Jun 06, 2023 at 04:37:45PM +0200, Thomas Gleixner wrote:
> @@ -787,6 +790,7 @@ static u64 collect_timerqueue(struct tim
>
> while ((next = timerqueue_getnext(head))) {
> struct cpu_timer *ctmr;
> + struct k_itimer *ktmr;
> u64 expires;
>
> ctmr = container_of(next, struct cpu_timer, node);
> @@ -799,6 +803,8 @@ static u64 collect_timerqueue(struct tim
> /* See posix_cpu_timer_wait_running() */
> rcu_assign_pointer(ctmr->handling, current);
> cpu_timer_dequeue(ctmr);
> + ktmr = container_of(ctmr, struct k_itimer, it.cpu);
> + ktmr->it_active = 0;
Maybe move this to cpu_timer_fire() because:
1) Other posix-timer implementation set it_active = 0
from their actual handler.
2) This place doesn't have the timer locked. Better Make
sure we have this protection to avoid mistakes against
potential future use of it_active.
Thanks.
> list_add_tail(&ctmr->elist, firing);
> }
>
>
next prev parent reply other threads:[~2023-07-03 22:30 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-06 14:37 [patch 00/45] posix-timers: Cure inconsistencies and the SIG_IGN mess Thomas Gleixner
2023-06-06 14:37 ` [patch 01/45] selftests/timers/posix_timers: Make signal distribution test less fragile Thomas Gleixner
2023-06-06 14:37 ` [patch 02/45] selftests/timers/posix_timers: Use TAP reporting format Thomas Gleixner
2023-06-06 14:37 ` [patch 03/45] selftests/timers/posix_timers: Add SIG_IGN test Thomas Gleixner
2023-06-06 14:37 ` [patch 04/45] selftests/timers/posix_timers: Validate signal rules Thomas Gleixner
2023-06-06 14:37 ` [patch 05/45] selftests/timers/posix-timers: Validate SIGEV_NONE Thomas Gleixner
2023-06-06 14:37 ` [patch 06/45] selftests/timers/posix-timers: Validate timer_gettime() Thomas Gleixner
2023-06-06 14:37 ` [patch 07/45] selftests/timers/posix-timers: Validate overrun after unblock Thomas Gleixner
2023-06-06 14:37 ` [patch 08/45] posix-timers: Convert timer list to hlist Thomas Gleixner
2023-06-22 21:18 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 09/45] posix-cpu-timers: Fix posix_cpu_timer_get() behaviour Thomas Gleixner
2023-06-26 22:46 ` Frederic Weisbecker
2023-06-29 18:14 ` Thomas Gleixner
2023-06-06 14:37 ` [patch 10/45] posix-cpu-timers: Use @now instead of @val for clarity Thomas Gleixner
2023-06-27 9:53 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 11/45] posix-cpu-timers: Remove incorrect comment in posix_cpu_timer_set() Thomas Gleixner
2023-06-27 10:30 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 12/45] posix-cpu-timers: Simplify posix_cpu_timer_set() Thomas Gleixner
2023-06-27 10:51 ` Frederic Weisbecker
2023-06-29 18:43 ` Thomas Gleixner
2023-06-06 14:37 ` [patch 13/45] posix-cpu-timers: Replace old expiry retrieval in posix_cpu_timer_set() Thomas Gleixner
2023-06-27 11:32 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 14/45] posix-timers: Consolidate interval retrieval Thomas Gleixner
2023-06-28 13:08 ` Frederic Weisbecker
2023-06-29 18:47 ` Thomas Gleixner
2023-06-30 11:25 ` Frederic Weisbecker
2023-06-30 13:07 ` Thomas Gleixner
2023-06-30 14:04 ` Frederic Weisbecker
2023-07-01 18:01 ` Thomas Gleixner
2023-06-06 14:37 ` [patch 15/45] posix-timers: Clear overrun in common_timer_set() Thomas Gleixner
2023-06-30 21:40 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 16/45] posix-timers: Consolidate timer setup Thomas Gleixner
2023-07-03 21:12 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 17/45] posix-cpu-timers: Make k_itimer::it_active consistent Thomas Gleixner
2023-07-03 22:30 ` Frederic Weisbecker [this message]
2023-06-06 14:37 ` [patch 18/45] posix-timers: Consolidate signal queueing Thomas Gleixner
2023-07-03 22:51 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 19/45] signal: Remove task argument from dequeue_signal() Thomas Gleixner
2023-07-04 10:02 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 20/45] signal: Replace BUG_ON()s Thomas Gleixner
2023-07-04 10:24 ` Frederic Weisbecker
2023-06-06 14:37 ` [patch 21/45] signal: Confine POSIX_TIMERS properly Thomas Gleixner
2023-06-06 14:37 ` [patch 22/45] signal: Get rid of resched_timer logic Thomas Gleixner
2023-06-06 14:37 ` [patch 23/45] posix-timers: Cure si_sys_private race Thomas Gleixner
2023-06-06 14:37 ` [patch 24/45] signal: Allow POSIX timer signals to be dropped Thomas Gleixner
2023-06-06 14:37 ` [patch 25/45] posix-timers: Drop signal if timer has been deleted or reprogrammed Thomas Gleixner
2023-06-06 14:38 ` [patch 26/45] posix-timers: Rename k_itimer::it_requeue_pending Thomas Gleixner
2023-06-06 14:38 ` [patch 27/45] posix-timers: Add proper state tracking Thomas Gleixner
2023-06-06 14:38 ` [patch 28/45] posix-timers: Make signal delivery consistent Thomas Gleixner
2023-06-06 14:38 ` [patch 29/45] posix-timers: Make signal overrun accounting sensible Thomas Gleixner
2023-06-06 14:38 ` [patch 30/45] posix-cpu-timers: Use dedicated flag for CPU timer nanosleep Thomas Gleixner
2023-06-06 14:38 ` [patch 31/45] posix-timers: Add a refcount to struct k_itimer Thomas Gleixner
2023-06-06 14:38 ` [patch 32/45] signal: Split up __sigqueue_alloc() Thomas Gleixner
2023-06-06 14:38 ` [patch 33/45] signal: Provide posixtimer_sigqueue_init() Thomas Gleixner
2023-06-06 14:38 ` [patch 34/45] signal: Add sys_private_ptr to siginfo::_sifields::_timer Thomas Gleixner
2023-06-06 14:38 ` [patch 35/45] signal: Refactor send_sigqueue() Thomas Gleixner
2023-06-06 14:38 ` [patch 36/45] posix-timers: Embed sigqueue in struct k_itimer Thomas Gleixner
2023-06-06 14:38 ` [patch 37/45] signal: Cleanup unused posix-timer leftovers Thomas Gleixner
2023-06-06 14:38 ` [patch 38/45] signal: Add task argument to flush_sigqueue_mask() Thomas Gleixner
2023-06-06 14:38 ` [patch 39/45] signal: Provide ignored_posix_timers list Thomas Gleixner
2023-06-06 14:38 ` [patch 40/45] posix-timers: Handle ignored list on delete and exit Thomas Gleixner
2023-06-06 14:38 ` [patch 41/45] signal: Handle ignored signals in do_sigaction(action != SIG_IGN) Thomas Gleixner
2023-06-06 14:38 ` [patch 42/45] signal: Queue ignored posixtimers on ignore list Thomas Gleixner
2023-06-06 14:38 ` [patch 43/45] posix-timers: Cleanup SIG_IGN workaround leftovers Thomas Gleixner
2023-06-06 14:38 ` [patch 44/45] alarmtimers: Remove the throttle mechanism from alarm_forward_now() Thomas Gleixner
2023-06-06 14:38 ` [patch 45/45] alarmtimers: Remove return value from alarm functions Thomas Gleixner
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