From: Jens Axboe <axboe@suse.de>
To: Marc-Christian Petersen <mcp@linux-systeme.de>
Cc: linux-kernel@vger.kernel.org,
Marcelo Tosatti <marcelo@conectiva.com.br>,
Adrian Bunk <bunk@fs.tum.de>
Subject: Re: 2.4.19' drivers/block/ll_rw_blk.c
Date: Tue, 6 Aug 2002 17:12:05 +0200 [thread overview]
Message-ID: <20020806151205.GD1132@suse.de> (raw)
In-Reply-To: <200208051223.29329.mcp@linux-systeme.de>
On Mon, Aug 05 2002, Marc-Christian Petersen wrote:
> Hi there,
>
> could you please consider changing those very slow behaviour in
> "drivers/block/ll_rw_blk.c"? ... Benchmarked against 2.4.18 this is horribly
> slower ... Doing some heavy disk i/o, want to start another thing, system
> freeze for some seconds ... Opening a xterm , Ctrl-D to leave, this takes
> about 5 seconds and somewhat is doing flushing to the disk.
>
> Maybe req_finished_io ?
>
> Adrian, could this be the problem you've experienced?
This is a crazy bug report, sorry :-)
What slow behaviour in ll_rw_blk.c?! Consider providing vmstat when the
slowdown takes place. Also, try enable profiling if it seems like hard
system freezes.
> Afaik this was changed for 2.4.19-pre7 and above.
2.4.19-pre7 works fine, 2.4.19-pre8 stinks?
--
Jens Axboe
prev parent reply other threads:[~2002-08-06 15:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-05 10:23 2.4.19' drivers/block/ll_rw_blk.c Marc-Christian Petersen
2002-08-06 15:12 ` Jens Axboe [this message]
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