tree 5665b06dcacf14c2e5e979ed1c7066633b259f80
parent 63a6440326e4cd01d6a663069208a0e68e9b833f
author Jeff Moyer <jmoyer@redhat.com> 1274888980 -0400
committer Linus Torvalds <torvalds@linux-foundation.org> 1274894427 -0700

do_generic_file_read: clear page errors when issuing a fresh read of the page

I/O errors can happen due to temporary failures, like multipath
errors or losing network contact with the iSCSI server. Because
of that, the VM will retry readpage on the page.

However, do_generic_file_read does not clear PG_error.  This
causes the system to be unable to actually use the data in the
page cache page, even if the subsequent readpage completes
successfully!

The function filemap_fault has had a ClearPageError before
readpage forever.  This patch simply adds the same to
do_generic_file_read.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Acked-by: Larry Woodman <lwoodman@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>