| commit | 0ed8ddf4045fcfcac36bad753dc4046118c603ec | |
| author | Eric Dumazet <eric.dumazet@gmail.com> | |
| Thu, 7 Oct 2010 10:44:07 +0000 (7 10:44 +0000) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Mon, 11 Oct 2010 19:54:04 +0000 (11 12:54 -0700) | ||
| tree | cf1d9eb14668c4d2257b3519ed7deec8c5cb396d | treesnapshot (tar.gz zip) |
| parent | d122179a3c0fdc71b88cb9e3605f372b1651a9ff | commitdiff |
neigh: Protect neigh->ha[] with a seqlock
Add a seqlock in struct neighbour to protect neigh->ha[], and avoid
dirtying neighbour in stress situation (many different flows / dsts)
Dirtying takes place because of read_lock(&n->lock) and n->used writes.
Switching to a seqlock, and writing n->used only on jiffies changes
permits less dirtying.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a seqlock in struct neighbour to protect neigh->ha[], and avoid
dirtying neighbour in stress situation (many different flows / dsts)
Dirtying takes place because of read_lock(&n->lock) and n->used writes.
Switching to a seqlock, and writing n->used only on jiffies changes
permits less dirtying.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| include/net/neighbour.h | diffblobblamehistory | |
| net/core/neighbour.c | diffblobblamehistory | |
| net/ipv4/arp.c | diffblobblamehistory | |
| net/sched/sch_teql.c | diffblobblamehistory |