tree c302c3d0b0558d3fc5ac0b5750e4f8150517ece5
parent 15c945c3d0913d73a7d57d7a0a3c4e2902598cc6
author Chen, Kenneth W <kenneth.w.chen@intel.com> 1169527243 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1169567526 -0800

[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>