Re: [PATCH net v2] vhost: fix ref cnt checking deadlock

2014-02-13 Thread David Miller
From: "Michael S. Tsirkin" Date: Thu, 13 Feb 2014 11:42:05 +0200 > vhost checked the counter within the refcnt before decrementing. It > really wanted to know that it is the one that has the last reference, as > a way to batch freeing resources a bit more efficiently. > > Note: we only let refc

Re: [PATCH net v2] vhost: fix ref cnt checking deadlock

2014-02-13 Thread Jason Wang
On 02/13/2014 05:42 PM, Michael S. Tsirkin wrote: > vhost checked the counter within the refcnt before decrementing. It > really wanted to know that it is the one that has the last reference, as > a way to batch freeing resources a bit more efficiently. > > Note: we only let refcount go to 0 on de

[PATCH net v2] vhost: fix ref cnt checking deadlock

2014-02-13 Thread Michael S. Tsirkin
vhost checked the counter within the refcnt before decrementing. It really wanted to know that it is the one that has the last reference, as a way to batch freeing resources a bit more efficiently. Note: we only let refcount go to 0 on device release. This works well but we now access the ref co