NFS nfs_vm_page_mkwrite: Don't freeze me, Bro...
Prevent filesystem freezes while handling the write page fault.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 0e9b4a0..039d587 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -569,6 +569,8 @@
filp, filp->f_mapping->host->i_ino,
(long long)page_offset(page));
+ sb_start_pagefault(inode->i_sb);
+
/* make sure the cache has finished storing the page */
nfs_fscache_wait_on_page_write(NFS_I(inode), page);
@@ -595,6 +597,7 @@
out_unlock:
unlock_page(page);
out:
+ sb_end_pagefault(inode->i_sb);
return ret;
}