From: bugme-daemon@bugzilla.kernel.org
Subject: [Bug 12224] journal activity on inactive partition causes inactive harddrive spinup
Date: Sun, 14 Dec 2008 15:10:54 -0800 (PST)
Message-ID: <20081214231054.86C82108041@picon.linux-foundation.org>
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------- Comment #2 from sandeen@redhat.com 2008-12-14 15:10 -------
bugme-daemon@bugzilla.kernel.org wrote:
> OK, that's a huge mess because bugzilla went and wordwrapped it. Let
> me fix it:
>
>> Dec 9 11:15:32 localhost logger: 8,0 0 1 0.000000000 1109 A WS 14375 + 8 <- (8,1) 14312
>> Dec 9 11:15:32 localhost logger: 8,0 0 2 0.000006705 1109 Q WS 14375 + 8 [kjournald]
>> Dec 9 11:15:32 localhost logger: 8,0 0 3 0.000043581 1109 G WS 14375 + 8 [kjournald]
>> Dec 9 11:15:32 localhost logger: 8,0 0 4 0.000065651 1109 P N [kjournald]
>> Dec 9 11:15:32 localhost logger: 8,0 0 5 0.000076267 1109 I W 14375 + 8 [kjournald]
>> Dec 9 11:15:32 localhost logger: 8,0 0 6 0.000300318 1109 D W 14375 + 8 [kjournald]
>> Dec 9 11:15:32 localhost logger: 8,0 0 7 0.000423518 1109 U N [kjournald] 1
>> Dec 9 11:15:32 localhost logger: 8,0 0 8 0.010028373 3 C W 14375 + 8 [0]
>> Dec 9 11:15:35 localhost logger: 8,0 0 9 3.219049689 1109 A WS 14383 + 8 <- (8,1) 14320
>> Dec 9 11:15:35 localhost logger: 8,0 0 10 3.219058350 1109 Q WS 14383 + 8 [kjournald]
>> Dec 9 11:15:35 localhost logger: 8,0 0 11 3.219095505 1109 G WS 14383 + 8 [kjournald]
>> Dec 9 11:15:35 localhost logger: 8,0 0 12 3.219115061 1109 P N [kjournald]
>> Dec 9 11:15:35 localhost logger: 8,0 0 13 3.219127074 1109 I W 14383 + 8 [kjournald]
>> Dec 9 11:15:35 localhost logger: 8,0 0 14 3.219344699 1109 D W 14383 + 8 [kjournald]
>> Dec 9 11:15:35 localhost logger: 8,0 0 15 3.219543607 1109 U N [kjournald] 1
>> Dec 9 11:15:35 localhost logger: 8,0 0 16 3.229477275 3 C W 14383 + 8 [0]
>
> I'm not familar with btrace. What are we looking at here?
Andrew, it's blktrace/blkparse output, basically. blkparse(1) manpage
has the details.
maj,min cpu seq time pid act rwbs off+len
8,0 0 1 0.000000000 1109 A WS 14375 + 8 <- (8,1) 14312
... etc
I'm not sure it gives us enough info; all we see is that there was an IO
on sdb (from sdb1)
I might suggest
# sysctl -w vm.block_dump=1
to see if you get any info about inodes on sda1 being dirtied.
(Also, I didn't see any info about sda1 in the posted fstab...)
-Eric
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