Messages in this thread | | | Date | Mon, 10 Apr 2017 12:15:34 +0200 | From | Martin Kepplinger <> | Subject | Re: [PATCH 0/5] Re: [Intel-gfx] [BUG][REGRESSION] i915 gpu hangs under load |
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Am 07.04.2017 01:23 schrieb Andrea Arcangeli: > I'm also getting kernel hangs every couple of days. For me it's still > not fixed here in 4.11-rc5. It's hard to reproduce, the best > reproducer is to build lineageos 14.1 on host while running LTP in a > guest to stress the guest VM. > > Initially I thought it was related to the fact I upgraded the xf86 > intel driver just a few weeks ago (I deferred any upgrade of the > userland intel driver since last July because of a regression that > never got fixed and broke xterm for me). After I found a workaround > for the userland regression (appended at the end for reference) I > started getting kernel hangs but they are separate issues as far as I > can tell. > > It's not well tested so beware... (it survived a couple of builds and > some VM reclaim but that's it). > > The first patch 1/5 is the potential fix for the i915 kernel hang. The > rest are incremental improvements. > > And I've no great solution for when the shrinker was invoked with the > struct_mutex held and and recurse on the lock. I don't think we can > possibly wait in such case (other than flush work that the second > patch does) but then practically it shouldn't be a big deal, the big > RAM eater is unlikely to be i915 when the system is low on memory. >
FWIW without having insight here, -rc6 seems to be good. No disturbing gpu hangs under load so far.
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