On 17.10.2017 10:47, Cornelia Huck wrote: > On Mon, 16 Oct 2017 22:23:56 +0200 > David Hildenbrand <da...@redhat.com> wrote: > >> Details about Low-Address Protection can be found in description of >> patch 1 and 2. It is basically a subpage protection of the first two >> pages of every address space (for which it is enabled). >> >> We can achieve this by simply directly invalidating the TLB entry and >> therefore forcing every write accesses onto these two pages into the slow >> path. >> >> With this patch, I can boot Linux just fine (which uses LAP). This also >> makes all related kvm-unit-tests that we have pass. > > Tested with a kernel based on the s390/features branch (4.14-rc2 + s390 > patches) and the initrd from the debian installer, had udevd shot down > by the oomkiller. That happened only once, so it was probably an > unrelated fluke, but that combination worked well before. >
Very unlikely, on invalid programming exceptions you would get a kernel panic, not run oom. (not saying it isn't possible, rather that it is very unlikely). Can you reproduce with more memory? Have you enabled SMP? (little higher memory consumption) I am running (almost) the same setup with 500M and haven't observed any such thing. > [More config data + logs available on request.] Can you send via (private) mail? I can have a look. Thanks for testing! -- Thanks, David
