From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Mon, 28 Dec 2015 18:30:42 +0000 (-0500)
Subject: NFS: Background flush should not be low priority
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b0ac1bd2bbfd5e500432714e55a791c4d394047f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

NFS: Background flush should not be low priority

Background flush is needed in order to satisfy the global page limits.
Don't subvert by reducing the priority.
This should also address a write starvation issue that was reported by
Neil Brown.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 7b9316406930..7a4fe7d82e65 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -247,8 +247,6 @@ static int wb_priority(struct writeback_control *wbc)
 		return FLUSH_HIGHPRI | FLUSH_STABLE;
 	if (wbc->sync_mode == WB_SYNC_ALL)
 		ret = FLUSH_COND_STABLE;
-	if (wbc->for_kupdate || wbc->for_background)
-		ret |= FLUSH_LOWPRI;
 	return ret;
 }