From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linux Kernel list <linux-kernel@vger.kernel.org>
Cc: Paul Mackerras <paulus@samba.org>, Andrew Morton <akpm@osdl.org>,
Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Subject: Strange IO behaviour on wakeup from sleep
Date: Wed, 27 Oct 2004 12:56:44 +1000 [thread overview]
Message-ID: <1098845804.606.4.camel@gaston> (raw)
Hi !
Not much datas at this point yet, but paulus and I noticed that current
bk (happened already last saturday or so) has a very strange problem
when waking up from sleep (suspend to ram) on our laptops.
This doesn't seem to be directly related to the PM code, at least not
the arch one, as far as I know. The IDE throughput goes down to less
than 100k/sec on hdparm. We haven't yet figured out where the time is
lost, the disk seem to properly be restored to UDMA4 as usual, that code
didn't change for ages, I don't think it's a problem at that level in
IDE.
I'm not sure yet how to track that down, it could be the IO scheduler
getting messed up on wakeup for some reason. Any clue appreciated.
Ben.
next reply other threads:[~2004-10-27 3:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-27 2:56 Benjamin Herrenschmidt [this message]
2004-10-27 6:24 ` Strange IO behaviour on wakeup from sleep Jens Axboe
2004-10-27 11:20 ` Tim Schmielau
2004-10-27 12:06 ` Benjamin Herrenschmidt
2004-10-27 12:13 ` Tim Schmielau
2004-10-27 13:01 ` Nigel Cunningham
2004-10-27 13:08 ` Benjamin Herrenschmidt
2004-10-27 13:20 ` Nigel Cunningham
-- strict thread matches above, loose matches on Subject: below --
2004-10-27 14:18 Zachary Amsden
2004-10-27 22:40 ` Benjamin Herrenschmidt
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