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[dm-devel] Re: [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex
- From: Alan Cox <alan lxorguk ukuu org uk>
- To: Pavel Machek <pavel ucw cz>
- Cc: Andrew Morton <akpm osdl org>, Eric Sandeen <sandeen redhat com>, Nigel Cunningham <nigel suspend2 net>, David Chinner <dgc sgi com>, linux-kernel vger kernel org, "Rafael J. Wysocki" <rjw sisk pl>, dm-devel redhat com, Srinivasa DS <srinivasa in ibm com>, Alasdair G Kergon <agk redhat com>
- Subject: [dm-devel] Re: [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex
- Date: Fri, 10 Nov 2006 10:24:09 +0000
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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