[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] freezing of kernel threads
On 22/11/2012 11:21, "Jan Beulich" <JBeulich@xxxxxxxx> 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())? I don't really recall. I expect someone pointed out the difference between the two drivers and so I added the call to blktap. Back then I don't know that any of our other drivers had kthreads? -- Keir > 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. > > Jan > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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