From: Lee Revell <rlrevell@joe-job.com>
To: "Theodore Ts'o" <tytso@mit.edu>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH] [1/4] /dev/random: Fix latency in rekeying sequence number
Date: Fri, 20 Aug 2004 01:10:26 -0400 [thread overview]
Message-ID: <1092978626.10063.15.camel@krustophenia.net> (raw)
In-Reply-To: <E1By1Sh-0001TJ-1U@thunk.org>
On Fri, 2004-08-20 at 00:57, Theodore Ts'o wrote:
> Based on reports from Ingo's Latency Tracer that the TCP sequence number
> rekey code is causing latency problems, I've moved the sequence number
> rekey to be done out of a workqueue.
>
This patch does not actually fix the problem, as 3-700usecs is still
spent in the spinlocked region, this just causes it to be done out of a
workqueue. It reduces the incidence of problems, but for latency
sensitive applications the worst-case is the important one.
Lee
next prev parent reply other threads:[~2004-08-20 5:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-20 4:57 [PATCH] [1/4] /dev/random: Fix latency in rekeying sequence number Theodore Ts'o
2004-08-20 5:10 ` Lee Revell [this message]
2004-08-22 21:31 ` Jens Maurer
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