From c8ebc7dd51be8d1ecc34ce43277ec7a6c0405a05 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 18 Dec 2017 14:39:13 -0500 Subject: NFS: Add a cond_resched() to nfs_commit_release_pages() commit 7f1bda447c9bd48b415acedba6b830f61591601f upstream. The commit list can get very large, and so we need a cond_resched() in nfs_commit_release_pages() in order to ensure we don't hog the CPU for excessive periods of time. Reported-by: Mike Galbraith Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/write.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 395b93f43df5..efe1b1757afc 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1646,6 +1646,8 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data) set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags); next: nfs_unlock_and_release_request(req); + /* Latency breaker */ + cond_resched(); } nfss = NFS_SERVER(data->inode); if (atomic_long_read(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) -- cgit v1.2.3