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From: Thomas Gleixner <tglx@linutronix.de>
To: Frederic Weisbecker <frederic@kernel.org>
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 V5 07/26] posix-timers: Add proper state tracking
Date: Thu, 24 Oct 2024 10:45:24 +0200	[thread overview]
Message-ID: <87r0856g9n.ffs@tglx> (raw)
In-Reply-To: <ZxZU5ViCYadY6eOE@localhost.localdomain>

On Mon, Oct 21 2024 at 15:19, Frederic Weisbecker wrote:

> Le Tue, Oct 01, 2024 at 10:42:09AM +0200, Thomas Gleixner a écrit :
>> From: Thomas Gleixner <tglx@linutronix.de>
>> 
>> Right now the state tracking is done by two struct members:
>> 
>>  - it_active:
>>      A boolean which tracks armed/disarmed state
>> 
>>  - it_signal_seq:
>>      A sequence counter which is used to invalidate settings
>>      and prevent rearming
>> 
>> Replace it_active with it_status and keep properly track about the states
>> in one place.
>> 
>> This allows to reuse it_signal_seq to track reprogramming, disarm and
>
> Did you mean it_status here?

No. it_signal_seq is used to validate whether a queued, but not yet
delivered signal, is valid or not. The sequence is stored in the signal
when the signal is queued and compared to the sequence on delivery.

Thanks,

        tglx

  reply	other threads:[~2024-10-24  8:45 UTC|newest]

Thread overview: 79+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-01  8:41 [patch V5 00/26] posix-timers: Cure the SIG_IGN mess Thomas Gleixner
2024-10-01  8:42 ` [patch V5 01/26] signal: Confine POSIX_TIMERS properly Thomas Gleixner
2024-10-18 12:50   ` Frederic Weisbecker
2024-10-18 21:49     ` Thomas Gleixner
2024-10-29 11:09   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2024-10-01  8:42 ` [patch V5 02/26] signal: Cleanup flush_sigqueue_mask() Thomas Gleixner
2024-10-18 13:05   ` Frederic Weisbecker
2024-10-29 11:09   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2024-10-01  8:42 ` [patch V5 03/26] posix-timers: Cure si_sys_private race Thomas Gleixner
2024-10-21 11:05   ` Frederic Weisbecker
2024-10-29 11:09   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2024-10-01  8:42 ` [patch V5 04/26] signal: Allow POSIX timer signals to be dropped Thomas Gleixner
2024-10-21 12:20   ` Frederic Weisbecker
2024-10-29 11:09   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2024-10-01  8:42 ` [patch V5 05/26] posix-timers: Drop signal if timer has been deleted or reprogrammed Thomas Gleixner
2024-10-21 12:29   ` Frederic Weisbecker
2024-10-24  8:40     ` Thomas Gleixner
2024-10-24 11:46       ` Frederic Weisbecker
2024-10-29 11:09   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2024-10-01  8:42 ` [patch V5 06/26] posix-timers: Rename k_itimer::it_requeue_pending Thomas Gleixner
2024-10-21 12:35   ` Frederic Weisbecker
2024-10-29 11:09   ` [tip: timers/core] posix-timers: Rename k_itimer:: It_requeue_pending tip-bot2 for Thomas Gleixner
2024-10-01  8:42 ` [patch V5 07/26] posix-timers: Add proper state tracking Thomas Gleixner
2024-10-21 13:19   ` Frederic Weisbecker
2024-10-24  8:45     ` Thomas Gleixner [this message]
2024-10-24 12:10       ` Frederic Weisbecker
2024-10-29 11:09   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2024-10-01  8:42 ` [patch V5 08/26] posix-timers: Make signal delivery consistent Thomas Gleixner
2024-10-21 14:40   ` Frederic Weisbecker
2024-10-24  8:52     ` Thomas Gleixner
2024-10-01  8:42 ` [patch V5 09/26] posix-timers: Make signal overrun accounting sensible Thomas Gleixner
2024-10-21 21:54   ` Frederic Weisbecker
2024-10-24  8:57     ` Thomas Gleixner
2024-10-24  9:10       ` Thomas Gleixner
2024-10-24 13:34         ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 10/26] posix-cpu-timers: Use dedicated flag for CPU timer nanosleep Thomas Gleixner
2024-10-22 14:25   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 11/26] posix-timers: Add a refcount to struct k_itimer Thomas Gleixner
2024-10-28 14:42   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 12/26] signal: Split up __sigqueue_alloc() Thomas Gleixner
2024-10-28 16:41   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 13/26] signal: Provide posixtimer_sigqueue_init() Thomas Gleixner
2024-10-29 13:25   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 14/26] posix-timers: Store PID type in the timer Thomas Gleixner
2024-10-29 13:46   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 15/26] signal: Refactor send_sigqueue() Thomas Gleixner
2024-10-29 14:06   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 16/26] signal: Replace resched_timer logic Thomas Gleixner
2024-10-29 15:08   ` Frederic Weisbecker
2024-10-29 15:56   ` Frederic Weisbecker
2024-10-29 16:22     ` Thomas Gleixner
2024-10-29 16:34       ` Frederic Weisbecker
2024-10-29 16:55         ` Thomas Gleixner
2024-10-29 17:55           ` Frederic Weisbecker
2024-10-29 19:16             ` Thomas Gleixner
2024-10-29 20:18               ` Frederic Weisbecker
2024-10-29 16:36       ` Thomas Gleixner
2024-10-29 16:04   ` Frederic Weisbecker
2024-10-29 16:59     ` Thomas Gleixner
2024-10-01  8:42 ` [patch V5 17/26] posix-timers: Embed sigqueue in struct k_itimer Thomas Gleixner
2024-10-29 16:29   ` Frederic Weisbecker
2024-10-30 13:55   ` Frederic Weisbecker
2024-10-30 14:30     ` Thomas Gleixner
2024-10-01  8:42 ` [patch V5 18/26] signal: Cleanup unused posix-timer leftovers Thomas Gleixner
2024-10-30 11:16   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 19/26] posix-timers: Move sequence logic into struct k_itimer Thomas Gleixner
2024-10-30 13:45   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 20/26] signal: Provide ignored_posix_timers list Thomas Gleixner
2024-10-30 14:02   ` Frederic Weisbecker
2024-10-01  8:42 ` [patch V5 21/26] posix-timers: Handle ignored list on delete and exit Thomas Gleixner
2024-10-30 17:06   ` Frederic Weisbecker
2024-10-30 17:34     ` Thomas Gleixner
2024-10-30 20:58       ` Thomas Gleixner
2024-10-01  8:42 ` [patch V5 22/26] signal: Handle ignored signals in do_sigaction(action != SIG_IGN) Thomas Gleixner
2024-10-01  8:42 ` [patch V5 23/26] signal: Queue ignored posixtimers on ignore list Thomas Gleixner
2024-10-01  8:42 ` [patch V5 24/26] posix-timers: Cleanup SIG_IGN workaround leftovers Thomas Gleixner
2024-10-01  8:42 ` [patch V5 25/26] alarmtimers: Remove the throttle mechanism from alarm_forward_now() Thomas Gleixner
2024-10-01  8:42 ` [patch V5 26/26] alarmtimers: Remove return value from alarm functions Thomas Gleixner
2024-10-01 20:48 ` [patch V5 00/26] posix-timers: Cure the SIG_IGN mess Eric W. Biederman

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