From: Chen, Kenneth W <kenneth.w.chen@intel.com>
Date: Tue, 23 Jan 2007 04:40:43 +0000 (-0800)
Subject: [PATCH] fix blk_direct_IO bio preparation
X-Git-Tag: v2.6.20-rc6~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cda9205da24aeaa8fb086b0fb85cdf39571ecc3f;p=pandora-kernel.git

[PATCH] fix blk_direct_IO bio preparation

For large size DIO that needs multiple bio, one full page worth of data was
lost at the boundary of bio's maximum sector or segment limits.  After a
bio is full and got submitted.  The outer while (nbytes) { ...  } loop will
allocate a new bio and just march on to index into next page.  It just
forgets about the page that bio_add_page() rejected when previous bio is
full.  Fix it by put the rejected page back to pvec so we pick it up again
for the next bio.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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