From: Alex Tomas <bzzz@tmi.comex.ru>
To: Andrew Morton <akpm@digeo.com>
Cc: Alex Tomas <bzzz@tmi.comex.ru>,
linux-kernel@alex.org.uk, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: 2.5.59-mm5
Date: 24 Jan 2003 22:58:13 +0300 [thread overview]
Message-ID: <m34r7ys4kq.fsf@lexa.home.net> (raw)
In-Reply-To: <20030124111249.227a40d6.akpm@digeo.com>
>>>>> Andrew Morton (AM) writes:
AM> We cannot free disk blocks until I/O against them has completed.
AM> Otherwise the block could be reused for something else, then the
AM> old IO will scribble on the new data.
AM> What we _can_ do is to defer the waiting - only wait on the I/O
AM> when someone reuses the disk blocks. So there are actually
AM> unused blocks with I/O in flight against them.
AM> We do that for metadata (the wait happens in
AM> unmap_underlying_metadata()) but for file data blocks there is no
AM> mechanism in place to look them up
yeah! indeed. my stupid mistake ...
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next prev parent reply other threads:[~2003-01-24 19:58 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-24 3:50 2.5.59-mm5 Andrew Morton
2003-01-24 11:03 ` 2.5.59-mm5 Alex Bligh - linux-kernel
2003-01-24 11:16 ` 2.5.59-mm5 Andrew Morton
2003-01-24 11:23 ` 2.5.59-mm5 Alex Tomas
2003-01-24 11:50 ` 2.5.59-mm5 Andrew Morton
2003-01-24 12:05 ` 2.5.59-mm5 Alex Tomas
2003-01-24 19:12 ` 2.5.59-mm5 Andrew Morton
2003-01-24 19:58 ` Alex Tomas [this message]
2003-01-25 17:32 ` 2.5.59-mm5 Ed Tomlinson
2003-01-25 17:41 ` 2.5.59-mm5 Andrew Morton
2003-01-25 20:34 ` 2.5.59-mm5 Ed Tomlinson
2003-01-25 22:33 ` 2.5.59-mm5 Andrew Morton
2003-01-26 1:43 ` 2.5.59-mm5 Ed Tomlinson
2003-01-26 2:17 ` 2.5.59-mm5 Andrew Morton
2003-01-26 3:51 ` 2.5.59-mm5 Ed Tomlinson
2003-01-26 4:04 ` 2.5.59-mm5 Andrew Morton
2003-01-24 15:56 ` 2.5.59-mm5 Oliver Xymoron
2003-01-24 16:04 ` 2.5.59-mm5 Nick Piggin
2003-01-24 17:09 ` 2.5.59-mm5 Giuliano Pochini
2003-01-24 17:22 ` 2.5.59-mm5 Nick Piggin
2003-01-24 19:34 ` 2.5.59-mm5 Valdis.Kletnieks
2003-01-24 20:04 ` 2.5.59-mm5 Jens Axboe
2003-01-24 22:02 ` 2.5.59-mm5 Valdis.Kletnieks
2003-01-25 12:28 ` 2.5.59-mm5 Jens Axboe
2003-01-24 12:14 ` 2.5.59-mm5 Nikita Danilov
2003-01-24 16:00 ` 2.5.59-mm5 Nick Piggin
2003-01-24 11:23 ` 2.5.59-mm5 Jens Axboe
2003-01-24 13:59 ` 2.5.59-mm5 got stuck during boot Helge Hafting
2003-01-24 17:44 ` Ed Tomlinson
2003-01-24 17:56 ` Nick Piggin
2003-01-24 19:18 ` Ed Tomlinson
2003-01-25 8:33 ` 2.5.59-mm5 Andres Salomon
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