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| author | Karsten Keil <kkeil@suse.de> | 2006-09-29 23:28:42 -0700 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-10-05 07:01:25 -0400 |
| commit | 39984a9fad0c642182f426d7771332d46f222103 (patch) | |
| tree | c57cec6ca1411d276fe959535b2b116167b11314 /drivers/net/bonding/bond_alb.c | |
| parent | 0a07bc645e818b88559d99f52ad45e35352e8228 (diff) | |
| download | linux-39984a9fad0c642182f426d7771332d46f222103.tar.gz linux-39984a9fad0c642182f426d7771332d46f222103.tar.bz2 linux-39984a9fad0c642182f426d7771332d46f222103.zip | |
[PATCH] bonding: fix deadlock on high loads in bond_alb_monitor()
In bond_alb_monitor the bond->curr_slave_lock write lock is taken
and then dev_set_promiscuity maybe called which can take some time,
depending on the network HW. If a network IRQ for this card come in
the softirq handler maybe try to deliver more packets which end up in
a request to the read lock of bond->curr_slave_lock -> deadlock.
This issue was found by a test lab during network stress tests, this patch
disable the softirq handler for this case and solved the issue.
Signed-off-by: Karsten Keil <kkeil@suse.de>
Acked-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/bonding/bond_alb.c')
| -rw-r--r-- | drivers/net/bonding/bond_alb.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c index e83bc825f6af..32923162179e 100644 --- a/drivers/net/bonding/bond_alb.c +++ b/drivers/net/bonding/bond_alb.c @@ -1433,7 +1433,7 @@ void bond_alb_monitor(struct bonding *bond) * write lock to protect from other code that also * sets the promiscuity. */ - write_lock(&bond->curr_slave_lock); + write_lock_bh(&bond->curr_slave_lock); if (bond_info->primary_is_promisc && (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) { @@ -1448,7 +1448,7 @@ void bond_alb_monitor(struct bonding *bond) bond_info->primary_is_promisc = 0; } - write_unlock(&bond->curr_slave_lock); + write_unlock_bh(&bond->curr_slave_lock); if (bond_info->rlb_rebalance) { bond_info->rlb_rebalance = 0; |