linux-kernel - Re: [PATCH 2.6.25.10 1/2] libata: fix locking for kmap

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Message-ID: <20080713151556.79f23215@lxorguk.ukuu.org.uk>
Date:	Sun, 13 Jul 2008 15:15:56 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"Jakub W. Jozwicki" <jozwicki@...er.pl>
Cc:	linux-kernel@...r.kernel.org, jgarzik@...hat.com, mingo@...e.hu,
	tglx@...esys.com
Subject: Re: [PATCH 2.6.25.10 1/2] libata: fix locking for kmap_atomic

> Sent patch was for:
> 
> [   16.787021] BUG: sleeping function called from invalid context IRQ-14(5730) 
> at arch/x86/mm/highmem_32.c:8

Fine - but the right fix is still to apply the patches that use a bounce
buffer, otherwise you might paper over the warning but you'll trash rt
performance. It needs fixing anyway especially with Tejun's changes to
the ATAPI logic to use PIO more often

Alan
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