linux-kernel - Re: [PATCH 2.6.19 5/5] fs: freeze

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Message-Id: <1163154249.7900.19.camel@localhost.localdomain>
Date:	Fri, 10 Nov 2006 10:24:09 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Pavel Machek <pavel@....cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Alasdair G Kergon <agk@...hat.com>,
	Eric Sandeen <sandeen@...hat.com>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, Srinivasa DS <srinivasa@...ibm.com>,
	Nigel Cunningham <nigel@...pend2.net>,
	David Chinner <dgc@....com>
Subject: Re: [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex

Ar Iau, 2006-11-09 am 22:17 +0100, ysgrifennodd Pavel Machek:
> Why not simply &~ PF_NOFREEZE on that particular process? Filesystems
> are free to use threads/work queues/whatever, but refrigerator should
> mean "no writes to filesystem" for them...

You can't go around altering the flags of another process - what locking
are you relying upon for this ?


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