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authorEric Dumazet <eric.dumazet@gmail.com>2010-02-08 15:00:39 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2010-02-23 07:37:55 -0800
commitb49b8e39e9c06a4d07c215de211279a91c42abc7 (patch)
tree5f6a2ad93d1fb7d1162e25e9b8bff9b93d541b2c /net/core
parent1393ad25685ec7f91137160dc482e7bb00cb27d2 (diff)
dst: call cond_resched() in dst_gc_task()
commit 2fc1b5dd99f66d93ffc23fd8df82d384c1a354c8 upstream. Kernel bugzilla #15239 On some workloads, it is quite possible to get a huge dst list to process in dst_gc_task(), and trigger soft lockup detection. Fix is to call cond_resched(), as we run in process context. Reported-by: Pawel Staszewski <pstaszewski@itcare.pl> Tested-by: Pawel Staszewski <pstaszewski@itcare.pl> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/dst.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/dst.c b/net/core/dst.c
index 57bc4d5b8d08..cb1b3488b739 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -17,6 +17,7 @@
#include <linux/string.h>
#include <linux/types.h>
#include <net/net_namespace.h>
+#include <linux/sched.h>
#include <net/dst.h>
@@ -79,6 +80,7 @@ loop:
while ((dst = next) != NULL) {
next = dst->next;
prefetch(&next->next);
+ cond_resched();
if (likely(atomic_read(&dst->__refcnt))) {
last->next = dst;
last = dst;