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authorSteffen Klassert <steffen.klassert@secunet.com>2016-02-22 10:40:07 +0100
committerSteffen Klassert <steffen.klassert@secunet.com>2016-03-17 10:28:42 +0100
commit6ad3122a08e3a9c2148873665752e87cf4f393cc (patch)
tree95c89c906cbdf02f28c71bbfdc0513dfe1cdddae /include
parentqmi_wwan: add "4G LTE usb-modem U901" (diff)
downloadlinux-6ad3122a08e3a9c2148873665752e87cf4f393cc.tar.xz
linux-6ad3122a08e3a9c2148873665752e87cf4f393cc.zip
flowcache: Avoid OOM condition under preasure
We can hit an OOM condition if we are under presure because we can not free the entries in gc_list fast enough. So add a counter for the not yet freed entries in the gc_list and refuse new allocations if the value is too high. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'include')
-rw-r--r--include/net/netns/xfrm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/netns/xfrm.h b/include/net/netns/xfrm.h
index 730d82ad6ee5..24cd3949a9a4 100644
--- a/include/net/netns/xfrm.h
+++ b/include/net/netns/xfrm.h
@@ -80,6 +80,7 @@ struct netns_xfrm {
struct flow_cache flow_cache_global;
atomic_t flow_cache_genid;
struct list_head flow_cache_gc_list;
+ atomic_t flow_cache_gc_count;
spinlock_t flow_cache_gc_lock;
struct work_struct flow_cache_gc_work;
struct work_struct flow_cache_flush_work;