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-rw-r--r--fs/nfs/file.c9
-rw-r--r--fs/nfs/write.c5
2 files changed, 12 insertions, 2 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 325df0aeab05..24832d040eb8 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -477,7 +477,8 @@ static int nfs_release_page(struct page *page, gfp_t gfp)
/* Always try to initiate a 'commit' if relevant, but only
* wait for it if __GFP_WAIT is set and the calling process is
- * allowed to block. Even then, only wait 1 second.
+ * allowed to block. Even then, only wait 1 second and only
+ * if the 'bdi' is not congested.
* Waiting indefinitely can cause deadlocks when the NFS
* server is on this machine, and there is no particular need
* to wait extensively here. A short wait has the benefit
@@ -488,9 +489,13 @@ static int nfs_release_page(struct page *page, gfp_t gfp)
nfs_commit_inode(mapping->host, 0);
if ((gfp & __GFP_WAIT) &&
!current_is_kswapd() &&
- !(current->flags & PF_FSTRANS)) {
+ !(current->flags & PF_FSTRANS) &&
+ !bdi_write_congested(&nfss->backing_dev_info)) {
wait_on_page_bit_killable_timeout(page, PG_private,
HZ);
+ if (PagePrivate(page))
+ set_bdi_congested(&nfss->backing_dev_info,
+ BLK_RW_ASYNC);
}
}
/* If PagePrivate() is set, then the page is not freeable */
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index c063a4e70354..12493846a2d3 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1611,6 +1611,7 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data)
struct nfs_page *req;
int status = data->task.tk_status;
struct nfs_commit_info cinfo;
+ struct nfs_server *nfss;
while (!list_empty(&data->pages)) {
req = nfs_list_entry(data->pages.next);
@@ -1644,6 +1645,10 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data)
next:
nfs_unlock_and_release_request(req);
}
+ nfss = NFS_SERVER(data->inode);
+ if (atomic_long_read(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH)
+ clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC);
+
nfs_init_cinfo(&cinfo, data->inode, data->dreq);
if (atomic_dec_and_test(&cinfo.mds->rpcs_out))
nfs_commit_clear_lock(NFS_I(data->inode));