Re: [PATCH] ENBD for 2.5.64

Andrew Morton (akpm@digeo.com)
Wed, 26 Mar 2003 02:18:42 -0800

Lars Marowsky-Bree <lmb@suse.de> wrote:
>
> In particular with ENBD, a partial write could occur at the block device
> layer. Now try to report that upwards to the write() call. Good luck.

Well you can't, unless it is an O_SYNC or O_DIRECT write...

But yes, for a normal old write() followed by an fsync() the IO error can be
lost. We'll fix this for 2.6. I have oxymoron's patches lined up, but they
need a couple of quality hours' worth of thinking about yet.

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