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Re: [PATCH 3/3] Add timeout feature

To: "jim owens" <jowens@xxxxxx>
Subject: Re: [PATCH 3/3] Add timeout feature
From: "Takashi Sato" <t-sato@xxxxxxxxxxxxx>
Date: Mon, 14 Jul 2008 22:12:51 +0900
Cc: <mtk.manpages@xxxxxxxxxxxxxx>, <axboe@xxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <dm-devel@xxxxxxxxxx>, <xfs@xxxxxxxxxxx>, <linux-ext4@xxxxxxxxxxxxxxx>, <viro@xxxxxxxxxxxxxxxxxx>, <akpm@xxxxxxxxxxxxxxxxxxxx>, <pavel@xxxxxxx>, <linux-fsdevel@xxxxxxxxxxxxxxx>, <hch@xxxxxxxxxxxxx>, "Miklos Szeredi" <miklos@xxxxxxxxxx>, "Arjan van de Ven" <arjan@xxxxxxxxxxxxx>, "Theodore Tso" <tytso@xxxxxxx>, "Dave Chinner" <david@xxxxxxxxxxxxx>
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Hi,

jim owens wrote:
In addition to the user controllable timeout mechanism,
we internally implement AUTO-THAW in the filesystem
whenever necessary to prevent a kernel hang/crash.

If an AUTO-THAW occurs, we post to the log and an
event manager so the user knows the snapshot is bad.

I am interested in AUTO-THAW.
What is the difference between the timeout and AUTO-THAW?
When the kernel detects a deadlock, does it occur to solve it?

Cheers, Takashi


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