Return-Path: Received: from mail-it0-f68.google.com ([209.85.214.68]:35346 "EHLO mail-it0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751957AbcFWUBh (ORCPT ); Thu, 23 Jun 2016 16:01:37 -0400 Received: by mail-it0-f68.google.com with SMTP id g127so12803659ith.2 for ; Thu, 23 Jun 2016 13:01:37 -0700 (PDT) From: Trond Myklebust To: linux-nfs@vger.kernel.org Subject: [PATCH v4 17/17] NFS nfs_vm_page_mkwrite: Don't freeze me, Bro... Date: Thu, 23 Jun 2016 16:00:49 -0400 Message-Id: <1466712049-5326-17-git-send-email-trond.myklebust@primarydata.com> In-Reply-To: <1466712049-5326-16-git-send-email-trond.myklebust@primarydata.com> References: <1466712049-5326-1-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-2-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-3-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-4-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-5-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-6-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-7-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-8-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-9-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-10-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-11-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-12-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-13-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-14-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-15-git-send-email-trond.myklebust@primarydata.com> <1466712049-5326-16-git-send-email-trond.myklebust@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Prevent filesystem freezes while handling the write page fault. Signed-off-by: Trond Myklebust --- fs/nfs/file.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 0e9b4a068f13..039d58790629 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -569,6 +569,8 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) 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 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) out_unlock: unlock_page(page); out: + sb_end_pagefault(inode->i_sb); return ret; } -- 2.7.4