ceph: Avoid data inconsistency due to d-cache aliasing in readpage()
authorLi Wang <liwang@ubuntukylin.com>
Wed, 13 Nov 2013 07:22:14 +0000 (15:22 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Jan 2014 20:24:22 +0000 (12:24 -0800)
commit88285f766c96205ccf30afd3d0621401701ff26c
tree4e6773891bf954fccf0a5fbfce996401e123f14f
parent6008a51b189b39fae1dd545da28c3cfc8038870c
ceph: Avoid data inconsistency due to d-cache aliasing in readpage()

commit 56f91aad69444d650237295f68c195b74d888d95 upstream.

If the length of data to be read in readpage() is exactly
PAGE_CACHE_SIZE, the original code does not flush d-cache
for data consistency after finishing reading. This patches fixes
this.

Signed-off-by: Li Wang <liwang@ubuntukylin.com>
Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/ceph/addr.c