diff options
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 10767ce2bf69..bd32ba6202d1 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -10028,10 +10028,12 @@ EXPORT_SYMBOL(netdev_refcnt_read); * We can get stuck here if buggy protocols don't correctly * call dev_put. */ +#define WAIT_REFS_MIN_MSECS 1 +#define WAIT_REFS_MAX_MSECS 250 static void netdev_wait_allrefs(struct net_device *dev) { unsigned long rebroadcast_time, warning_time; - int refcnt; + int wait = 0, refcnt; linkwatch_forget_dev(dev); @@ -10065,7 +10067,13 @@ static void netdev_wait_allrefs(struct net_device *dev) rebroadcast_time = jiffies; } - msleep(250); + if (!wait) { + rcu_barrier(); + wait = WAIT_REFS_MIN_MSECS; + } else { + msleep(wait); + wait = min(wait << 1, WAIT_REFS_MAX_MSECS); + } refcnt = netdev_refcnt_read(dev); |