AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

dst: call cond_resched() in dst_gc_task()

Browse Source 
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>
This commit is contained in:
Eric Dumazet 2010-02-08 15:00:39 -08:00 committed by David S. Miller
parent d696c7bdaa
commit 2fc1b5dd99
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/core/dst.c
View File

@ -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 @@ static void dst_gc_task(struct work_struct *work)
while ((dst = next) != NULL) {
next = dst->next;
prefetch(&next->next);
cond_resched();
if (likely(atomic_read(&dst->__refcnt))) {
last->next = dst;
last = dst;