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Date: Fri, 22 Nov 2002 04:00:49 -0800
From: William Lee Irwin III <wli@holomorphy.com>
To: Manish Lachwani <manish@Zambeel.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.4.17 SMP hangs ..
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On Wed, Nov 20, 2002 at 09:28:06PM -0800, Manish Lachwani wrote:
> I am seeing system hangs with 2.4.17 SMP kernel when doing mke2fs accros 12
> drives in parallel. However, the hangs only occur when the I/O rate from
> vmstat is high:

This is the BKL/irqlock/io_request_lock contention issue. 2.5.x is
the only answer here: it has per-queue locking and has removed the
irqlock from the BKL.


Bill
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