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Date: Thu, 01 Aug 2002 02:02:13 -0700
From: Andrew Morton <akpm@zip.com.au>
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To: Jens Axboe <axboe@suse.de>
CC: Marcelo Tosatti <marcelo@conectiva.com.br>,
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Subject: Re: Linux v2.4.19-rc5
References: <20020801074953.GJ1644@suse.de> <Pine.LNX.4.44.0208010406230.1728-100000@freak.distro.conectiva> <20020801081010.GA1096@suse.de>
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Jens Axboe wrote:
> 
> ...
> > Anyway, lets wait for the numbers.
> 
> It just 'feels' like the sort of change that might have odd side
> effects.

It's almost impossible to get READA to do anything.  For example, in
current 2.5, if a READA attempt is actually aborted, end_buffer_io_sync
reports a "buffer I/O error".  Every time. And nobody has reported this.

It _is_ possible to hit this in 2.5, because of ext2_preread_inode().

Probably, also it's possible to hit it in 2.4 with hundreds of processes
all issuing ext3 directory readahead.  But it's pretty remote.
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