Re: [PATCH 0/3] memory_hotplug: hyperv: fix deadlock between memory adding and onlining

2015-02-12 Thread Vitaly Kuznetsov
David Rientjes writes: > On Wed, 11 Feb 2015, David Rientjes wrote: > >> > If newly added memory is brought online with e.g. udev rule: >> > SUBSYSTEM=="memory", ACTION=="add", ATTR{state}="online" >> > the following deadlock is observed (and easily reproducable): >> > >> > First participant, wo

Re: [PATCH 0/3] memory_hotplug: hyperv: fix deadlock between memory adding and onlining

2015-02-12 Thread Vitaly Kuznetsov
David Rientjes writes: > On Wed, 11 Feb 2015, Vitaly Kuznetsov wrote: > >> If newly added memory is brought online with e.g. udev rule: >> SUBSYSTEM=="memory", ACTION=="add", ATTR{state}="online" >> the following deadlock is observed (and easily reproducable): >> >> First participant, worker thr

[PATCH 0/3] memory_hotplug: hyperv: fix deadlock between memory adding and onlining

2015-02-11 Thread Vitaly Kuznetsov
If newly added memory is brought online with e.g. udev rule: SUBSYSTEM=="memory", ACTION=="add", ATTR{state}="online" the following deadlock is observed (and easily reproducable): First participant, worker thread doing add_memory(): [ 724.948846] kworker/0:1 D 88000412f9c8 1324827