Re: [Qemu-devel] [PATCH v2] throttle-groups: update tg->any_timer_armed[] on detach

2017-09-20 Thread Stefan Hajnoczi
On Wed, Sep 20, 2017 at 02:17:51PM +0200, Alberto Garcia wrote: > On Wed 20 Sep 2017 01:39:02 PM CEST, Manos Pitsidianakis wrote: > >>> void throttle_group_detach_aio_context(ThrottleGroupMember *tgm) > >>> { > >>> ThrottleTimers *tt = &tgm->throttle_timers; > >>> +ThrottleGroup *tg = co

Re: [Qemu-devel] [PATCH v2] throttle-groups: update tg->any_timer_armed[] on detach

2017-09-20 Thread Alberto Garcia
On Wed 20 Sep 2017 01:39:02 PM CEST, Manos Pitsidianakis wrote: >>> void throttle_group_detach_aio_context(ThrottleGroupMember *tgm) >>> { >>> ThrottleTimers *tt = &tgm->throttle_timers; >>> +ThrottleGroup *tg = container_of(tgm->throttle_state, ThrottleGroup, >>> ts); >>> + >>> +qe

Re: [Qemu-devel] [PATCH v2] throttle-groups: update tg->any_timer_armed[] on detach

2017-09-20 Thread Alberto Garcia
On Wed 20 Sep 2017 12:17:40 PM CEST, Stefan Hajnoczi wrote: > @@ -592,6 +592,17 @@ void > throttle_group_attach_aio_context(ThrottleGroupMember *tgm, > void throttle_group_detach_aio_context(ThrottleGroupMember *tgm) > { > ThrottleTimers *tt = &tgm->throttle_timers; > +ThrottleGroup *tg

[Qemu-devel] [PATCH v2] throttle-groups: update tg->any_timer_armed[] on detach

2017-09-20 Thread Stefan Hajnoczi
Clear tg->any_timer_armed[] when throttling timers are destroyed during AioContext attach/detach. Failure to do so causes throttling to hang because we believe the timer is already scheduled! The following was broken at least since QEMU 2.10.0 with -drive iops=100: $ dd if=/dev/zero of=/dev/vd

Re: [Qemu-devel] [PATCH v2] throttle-groups: update tg->any_timer_armed[] on detach

2017-09-20 Thread Manos Pitsidianakis
On Wed, Sep 20, 2017 at 11:17:40AM +0100, Stefan Hajnoczi wrote: Clear tg->any_timer_armed[] when throttling timers are destroyed during AioContext attach/detach. Failure to do so causes throttling to hang because we believe the timer is already scheduled! The following was broken at least sinc

Re: [Qemu-devel] [PATCH v2] throttle-groups: update tg->any_timer_armed[] on detach

2017-09-20 Thread Manos Pitsidianakis
On Wed, Sep 20, 2017 at 01:08:52PM +0200, Alberto Garcia wrote: On Wed 20 Sep 2017 12:17:40 PM CEST, Stefan Hajnoczi wrote: @@ -592,6 +592,17 @@ void throttle_group_attach_aio_context(ThrottleGroupMember *tgm, void throttle_group_detach_aio_context(ThrottleGroupMember *tgm) { ThrottleTim