From: Maxim Levitsky <maximlevitsky@gmail.com>
To: Mark Lord <kernel@teksavvy.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
IDE/ATA development list <linux-ide@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>
Subject: Re: "blocked for more than 120 secs" --> a valid situation, how to prevent?
Date: Fri, 24 Sep 2010 03:58:13 +0200 [thread overview]
Message-ID: <1285293493.17998.2.camel@maxim-laptop> (raw)
In-Reply-To: <4C9BE5A8.1090002@teksavvy.com>
On Thu, 2010-09-23 at 19:41 -0400, Mark Lord wrote:
> What's the purpose of this stack dump,
> and how can it be prevented in this NORMAL situation??
>
> The command was "hdparm --security-erase NULL /dev/sdb",
> which takes about 66 minutes to complete on this particular drive.
>
> I don't see any obvious way for the task to mark itself
> as needing longer than 120 secs to complete the operation.
There is other valid user case.
If application calls sys_sync and at same time the filesystem is written
by an other application, the sync can easily take more that 2 minutes.
Or if block device is slow (as it was with some flash cards).
Indeed it would be good to have a kind of touch_softlockup_watchdog().
Best regards,
Maxim Levitsky
next prev parent reply other threads:[~2010-09-24 1:58 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
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 ` Maxim Levitsky [this message]
2010-09-24 2:08 ` "blocked for more than 120 secs" --> a valid situation, how to prevent? Kyle McMartin
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