From: Andrew Morton <akpm@linux-foundation.org>
To: Davide Libenzi <davidel@xmailserver.org>
Cc: linux-kernel@vger.kernel.org, zach.brown@oracle.com,
jroberson@chesapeake.net
Subject: Re: [patch] eventfd/kaio integration fix
Date: Wed, 9 Apr 2008 12:08:12 -0700 [thread overview]
Message-ID: <20080409120812.cad8f173.akpm@linux-foundation.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0804091138050.7000@alien.or.mcafeemobile.com>
On Wed, 9 Apr 2008 11:45:47 -0700 (PDT)
Davide Libenzi <davidel@xmailserver.org> wrote:
> Jeff Roberson discovered a race when using kaio eventfd based
> notifications. This patch fixes the race by moving the notification inside
> the spinlocked section of kaio.
Missing information.
What are the consequences of this race, when it occurs?
> The operation is safe since eventfd
> spinlock and kaio one are unrelated.
Yes, it's safe from that perspective.
However with this patch applied, we will no longer run eventfd_signal() if
kiocbIsCancelled(iocb). Convincing is needed, please?
next prev parent reply other threads:[~2008-04-09 19:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-09 18:45 Davide Libenzi
2008-04-09 19:08 ` Andrew Morton [this message]
2008-04-09 19:19 ` Davide Libenzi
2008-04-09 19:33 ` Jeff Roberson
2008-04-13 12:29 ` Oliver Pinter
2008-04-13 22:57 ` Davide Libenzi
2008-04-14 17:56 ` Oliver Pinter
2008-04-14 18:02 ` Davide Libenzi
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