From: Jens Axboe <axboe@kernel.dk>
To: Mark Lord <kernel@teksavvy.com>
Cc: dgilbert@interlog.com,
Linux Kernel <linux-kernel@vger.kernel.org>,
IDE/ATA development list <linux-ide@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>,
Joel Becker <joel.becker@oracle.com>
Subject: Re: [PATCH] block: Prevent hang_check firing during long I/O
Date: Fri, 24 Sep 2010 15:52:39 +0200 [thread overview]
Message-ID: <4C9CAD27.1030705@kernel.dk> (raw)
In-Reply-To: <1285336273.9259.2.camel@corey>
On 2010-09-24 15:51, Mark Lord wrote:
> During long I/O operations, the hang_check timer may fire,
> trigger stack dumps that unnecessarily alarm the user.
>
> Eg. hdparm --security-erase NULL /dev/sdb ## can take *hours* to complete
>
> So, if hang_check is armed, we should wake up periodically
> to prevent it from triggering. This patch uses a wake-up interval
> equal to half the hang_check timer period, which keeps overhead low enough.
Applied, thanks.
--
Jens Axboe
next prev parent reply other threads:[~2010-09-24 13:52 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 23:41 "blocked for more than 120 secs" --> a valid situation, how to prevent? Mark Lord
2010-09-24 0:05 ` Douglas Gilbert
2010-09-24 2:53 ` Mark Lord
2010-09-24 3:51 ` Mark Lord
2010-09-24 9:12 ` Jens Axboe
2010-09-24 13:51 ` [PATCH] block: Prevent hang_check firing during long I/O Mark Lord
2010-09-24 13:52 ` Jens Axboe [this message]
2010-09-24 4:41 ` "blocked for more than 120 secs" --> a valid situation, how to prevent? Douglas Gilbert
2010-09-24 0:51 ` Stan Hoeppner
2010-09-24 1:37 ` Kyle McMartin
2010-09-24 3:48 ` Stan Hoeppner
2010-09-24 5:02 ` Douglas Gilbert
2010-09-24 5:31 ` Mark Lord
2010-09-24 6:22 ` Stan Hoeppner
2010-09-24 6:30 ` hdparm-9.32 released: recommended upgrade Mark Lord
2010-09-24 1:58 ` "blocked for more than 120 secs" --> a valid situation, how to prevent? Maxim Levitsky
2010-09-24 2:08 ` Kyle McMartin
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