From: Paul P Komkoff Jr <i@stingr.net>
To: linux-btrace@vger.kernel.org
Subject: Blkparse weirdness with "A" (remap) action
Date: Thu, 26 Jul 2007 19:39:52 +0000 [thread overview]
Message-ID: <20070726193952.GN32546@stingr.net> (raw)
Hi!
I'm having a little problem here. I have a setup with md over some
disks, and I'm running blktrace /dev/md? /dev/sd?, then doing blkparse
*.blktrace.*, I'm getting this kind of stuff:
40,131071 1 67 3.043450168 420 A W 4274944 + 8 <- (253,0) 4275328
40,131071 1 67 3.043450168 420 A W 4274944 + 8 <- (253,0) 4275328
The target device on the left is supposed to be 9,1 because dm0 is
mapped to a md1 (which is raid10). But in reality target device
major/minor is gibberish.
I also observe same behavior with raid0 - when requests get remapped
by raid0.
Is it known behavior or I'm doing something wrong? I'm x86_64, and
tried this on a 2.6.18-ancient and 2.6.21 fedora kernel.
--
Paul P 'Stingray' Komkoff Jr // http://stingr.net/key <- my pgp key
This message represents the official view of the voices in my head
next reply other threads:[~2007-07-26 19:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-26 19:39 Paul P Komkoff Jr [this message]
2007-07-26 20:16 ` Blkparse weirdness with "A" (remap) action Paul P Komkoff Jr
2007-07-27 6:20 ` Jens Axboe
2007-08-06 14:14 ` Alan D. Brunelle
2007-08-06 14:36 ` Alan D. Brunelle
2007-08-07 8:22 ` Jens Axboe
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