[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] freezing of kernel threads
On Thu, Nov 22, 2012 at 11:21:30AM +0000, Jan Beulich wrote: > Keir, > > in linux-2.6.18-xen.hg c/s 74:cb50d25a9468 you made blktap > match blkback in calling try_to_freeze() from the main thread loop. > Threads in other drivers didn't get changed, though. Is there a > particular reason why only block, and only backend, threads are in > need of this (the only other one using it is xenfb_thread())? > > Konrad, as of 2.6.23 kernel threads are non-freezable by default, > i.e. xen-blkback calling try_to_freeze() is completely pointless > without a prior call to set_freezable(). Also, in case the latter is to > be added, switching to wait_event_freezable() instead of the > direct use of try_to_freeze() might be the right way to go. OK, any idea why the need to be come freezable was added in? Just for power suspend/resume? > > Jan > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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