On Mon, Apr 27, 2015 at 7:47 AM, Anton Ivanov <anton.iva...@kot-begemot.co.uk> wrote: > On 26/04/15 22:00, Richard Weinberger wrote: >> >>>> Can you give the attached patch a try? >>>> Let's see if it proves my theory. >>>> Looks like UML's clocksource needs fixing. >>> Hi Richard, >>> >>> I did run this for an hour and did 4 suspend/resume cycles and it seems >>> not to hang any more! >> Yay! >> BTW: Changing the host's time should also work for testing... >> >>> I'll test your other patch the next week, but AFAIU using clock_gettime >>> should solve this hangs in a sane way. >> Yep. I have no idea why UML is currently using gettimeofday() as clocksource, >> this is completely bogus. ;-\ > > It is even more bogus than you think - read time.c, it is using itimer > on the virtual clock for all timers for extra spice so the timers are > dependent on how much cpu it uses at any given time.
Yep. > It does not need to be - I wrote a patchset for it to use posix timers > and CLOCK_MONOTONIC. It went into Richard's queue ~ a year ago along > with an epoll based IRQ controller and some vNIC drivers. > > Have not heard of it since. mea culpa! If I forget a patch, just shout at me. Can you please rebase your patches against 4.1-rc1? Such that I can merge them ASAP... -- Thanks, //richard ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
