From: Andrew Morton <akpm@linux-foundation.org>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Davidlohr Bueso <davidlohr.bueso@hp.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
1vier1@web.de
Subject: Re: [PATCH 6/6] ipc/sem.c: make semctl(,,{GETNCNT,GETZCNT}) standard compliant
Date: Mon, 19 May 2014 15:46:39 -0700 [thread overview]
Message-ID: <20140519154639.5570a30f8b47872a323dcdfd@linux-foundation.org> (raw)
In-Reply-To: <1400399917-17583-7-git-send-email-manfred@colorfullife.com>
On Sun, 18 May 2014 09:58:37 +0200 Manfred Spraul <manfred@colorfullife.com> wrote:
> SUSv4 clearly defines how semncnt and semzcnt must be calculated:
> A task waits on exactly one semaphore:
> The semaphore from the first operation in the sop array that cannot proceed.
>
> The Linux implementation never followed the standard, it tried to count all
> semaphores that might be the reason why a task sleeps.
>
> This patch fixes that.
What are the back-compatibility implications of this change?
next prev parent reply other threads:[~2014-05-19 22:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-18 7:58 [PATCH 0/6] ipc/sem.c: Fix semctl(,,{GETNCNT,GETZCNT}) Manfred Spraul
2014-05-18 7:58 ` [PATCH 1/6] ipc/sem.c: further whitespace cleanups Manfred Spraul
2014-05-18 7:58 ` [PATCH 2/6] ipc/sem.c: Bugfix for semctl(,,GETZCNT) Manfred Spraul
2014-05-18 7:58 ` [PATCH 3/6] ipc/sem.c: remove code duplication Manfred Spraul
2014-05-18 7:58 ` [PATCH 4/6] ipc/sem.c: Change perform_atomic_semop parameters Manfred Spraul
2014-05-18 7:58 ` [PATCH 5/6] ipc/sem.c: Store which operation blocks in perform_atomic_semop() Manfred Spraul
2014-05-18 7:58 ` [PATCH 6/6] ipc/sem.c: make semctl(,,{GETNCNT,GETZCNT}) standard compliant Manfred Spraul
2014-05-19 22:46 ` Andrew Morton [this message]
2014-05-20 6:56 ` Michael Kerrisk (man-pages)
2014-05-20 18:30 ` Manfred Spraul
2014-05-20 19:01 ` Andrew Morton
2014-05-18 18:03 ` [PATCH 0/6] ipc/sem.c: Fix semctl(,,{GETNCNT,GETZCNT}) Davidlohr Bueso
-- strict thread matches above, loose matches on Subject: below --
2014-05-10 10:03 Manfred Spraul
2014-05-10 10:03 ` [PATCH 1/6] ipc/sem.c: further whitespace cleanups Manfred Spraul
2014-05-10 10:03 ` [PATCH 2/6] ipc/sem.c: Bugfix for semctl(,,GETZCNT) Manfred Spraul
2014-05-10 10:03 ` [PATCH 3/6] ipc/sem.c: remove code duplication Manfred Spraul
2014-05-10 10:03 ` [PATCH 4/6] ipc/sem.c: Change perform_atomic_semop parameters Manfred Spraul
2014-05-10 10:03 ` [PATCH 5/6] ipc/sem.c: Store which operation blocks in perform_atomic_semop() Manfred Spraul
2014-05-10 10:03 ` [PATCH 6/6] ipc/sem.c: make semctl(,,{GETNCNT,GETZCNT}) standard compliant Manfred Spraul
2014-05-14 14:52 ` Davidlohr Bueso
2014-05-14 22:30 ` Andrew Morton
2014-05-15 4:24 ` Manfred Spraul
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