ipv4: reintroduce route cache garbage collector
authorEric Dumazet <eric.dumazet@gmail.com>
Wed, 21 Dec 2011 20:47:16 +0000 (15:47 -0500)
committerDavid S. Miller <davem@davemloft.net>
Wed, 21 Dec 2011 20:47:16 +0000 (15:47 -0500)
commit9f28a2fc0bd77511f649c0a788c7bf9a5fd04edb
treeea154ab2f82d422b1d6ed835c89acdb16b47d4f7
parentb4949b84567f3ae1227d076fc95bbd8efea06506
ipv4: reintroduce route cache garbage collector

Commit 2c8cec5c10b (ipv4: Cache learned PMTU information in inetpeer)
removed IP route cache garbage collector a bit too soon, as this gc was
responsible for expired routes cleanup, releasing their neighbour
reference.

As pointed out by Robert Gladewitz, recent kernels can fill and exhaust
their neighbour cache.

Reintroduce the garbage collection, since we'll have to wait our
neighbour lookups become refcount-less to not depend on this stuff.

Reported-by: Robert Gladewitz <gladewitz@gmx.de>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/route.c