This is a note to let you know that I've just added the patch titled ceph: update readpages osd request according to size of pages to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ceph-update-readpages-osd-request-according-to-size-of-pages.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From d641df819db8b80198fd85d9de91137e8a823b07 Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" <zyan@xxxxxxxxxx> Date: Thu, 19 Jan 2017 11:21:29 +0800 Subject: ceph: update readpages osd request according to size of pages From: Yan, Zheng <zyan@xxxxxxxxxx> commit d641df819db8b80198fd85d9de91137e8a823b07 upstream. add_to_page_cache_lru() can fails, so the actual pages to read can be smaller than the initial size of osd request. We need to update osd request size in that case. Signed-off-by: Yan, Zheng <zyan@xxxxxxxxxx> Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/ceph/addr.c | 1 + net/ceph/osd_client.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -363,6 +363,7 @@ static int start_read(struct inode *inod nr_pages = i; if (nr_pages > 0) { len = nr_pages << PAGE_SHIFT; + osd_req_op_extent_update(req, 0, len); break; } goto out_pages; --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -672,7 +672,8 @@ void osd_req_op_extent_update(struct cep BUG_ON(length > previous); op->extent.length = length; - op->indata_len -= previous - length; + if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) + op->indata_len -= previous - length; } EXPORT_SYMBOL(osd_req_op_extent_update); Patches currently in stable-queue which might be from zyan@xxxxxxxxxx are queue-4.9/ceph-update-readpages-osd-request-according-to-size-of-pages.patch