linux-kernel - Re: Clear PG_error before reading a page

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Message-ID: <20070529170610.GB15502@chiva>
Date:	Tue, 29 May 2007 19:06:10 +0200
From:	Johann Lombardi <johann@...sterfs.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Clear PG_error before reading a page

On Thu, May 17, 2007 at 09:47:30AM -0700, Andrew Morton wrote:
> So running ioctl(BLKFLSBUF) against the device will fix things up?

No, 'blockdev --flushbufs /dev/sdb' doesn't help.

> Perhaps not, and we should invalidate all the file data as well. The
> only ways we have of doing that are umount+mount or /proc/sys/vm/drop_caches.

'echo > /proc/sys/vm/drop_caches' works. Thanks.

Johann
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