This is a note to let you know that I've just added the patch titled
nfs: use blocking page_group_lock in add_request
to the 3.16-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:
nfs-use-blocking-page_group_lock-in-add_request.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From [email protected] Thu Oct 2 16:49:39 2014
From: Trond Myklebust <[email protected]>
Date: Mon, 15 Sep 2014 14:14:41 -0400
Subject: nfs: use blocking page_group_lock in add_request
To: [email protected]
Cc: Weston Andros Adamson <[email protected]>, [email protected]
Message-ID: <1410804885-17228-11-git-send-email-trond.mykleb...@primarydata.com>
From: Weston Andros Adamson <[email protected]>
commit bfd484a5606d6a0379a0a2f04251b1e5c1f8995c upstream.
__nfs_pageio_add_request was calling nfs_page_group_lock nonblocking, but
this can return -EAGAIN which would end up passing -EIO to the application.
There is no reason not to block in this path, so change the two calls to
do so. Also, there is no need to check the return value of
nfs_page_group_lock when nonblock=false, so remove the error handling code.
Signed-off-by: Weston Andros Adamson <[email protected]>
Reviewed-by: Peng Tao <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/nfs/pagelist.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -873,13 +873,8 @@ static int __nfs_pageio_add_request(stru
struct nfs_page *subreq;
unsigned int bytes_left = 0;
unsigned int offset, pgbase;
- int ret;
- ret = nfs_page_group_lock(req, true);
- if (ret < 0) {
- desc->pg_error = ret;
- return 0;
- }
+ nfs_page_group_lock(req, false);
subreq = req;
bytes_left = subreq->wb_bytes;
@@ -901,11 +896,7 @@ static int __nfs_pageio_add_request(stru
if (desc->pg_recoalesce)
return 0;
/* retry add_request for this subreq */
- ret = nfs_page_group_lock(req, true);
- if (ret < 0) {
- desc->pg_error = ret;
- return 0;
- }
+ nfs_page_group_lock(req, false);
continue;
}
Patches currently in stable-queue which might be from
[email protected] are
queue-3.16/nfs-move-nfs_pgio_data-and-remove-nfs_rw_header.patch
queue-3.16/nfs-use-blocking-page_group_lock-in-add_request.patch
queue-3.16/nfs-remove-pgio_header-refcount-related-cleanup.patch
queue-3.16/pnfs-add-pnfs_put_lseg_async.patch
queue-3.16/nfs-can_coalesce_requests-must-enforce-contiguity.patch
queue-3.16/nfs-disallow-duplicate-pages-in-pgio-page-vectors.patch
queue-3.16/nfs-fix-error-handling-in-lock_and_join_requests.patch
queue-3.16/nfs-change-nfs_page_group_lock-argument.patch
queue-3.16/nfsv4-nfs4_state_manager-vs.-nfs_server_remove_lists.patch
queue-3.16/nfsv4-fix-another-bug-in-the-close-open_downgrade-code.patch
queue-3.16/nfs-check-wait_on_bit_lock-err-in-page_group_lock.patch
queue-3.16/nfs-don-t-sleep-with-inode-lock-in-lock_and_join_requests.patch
queue-3.16/nfs-rename-members-of-nfs_pgio_data.patch
queue-3.16/nfs-fix-nonblocking-calls-to-nfs_page_group_lock.patch
queue-3.16/nfs-merge-nfs_pgio_data-into-_header.patch
queue-3.16/nfs-clear_request_commit-while-holding-i_lock.patch
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