On 04/22/2014 12:30 PM, Daniel Vetter wrote: >> > > During testing of i915.ko with working texture sets larger than RAM, we >> > > encounter OOM with plenty of memory still trapped within writeback, e.g: >> > > >> > > [ 42.386039] active_anon:10134 inactive_anon:1900781 isolated_anon:32 >> > > active_file:33 inactive_file:39 isolated_file:0 >> > > unevictable:0 dirty:0 writeback:337627 unstable:0 >> > > free:11985 slab_reclaimable:9458 slab_unreclaimable:23614 >> > > mapped:41 shmem:1560769 pagetables:1276 bounce:0 >> > > >> > > If we throttle for writeback following shrink_slab, this gives us time >> > > to wait upon the writeback generated by the i915.ko shinker: >> > > >> > > [ 4756.750808] active_anon:24386 inactive_anon:900793 isolated_anon:0 >> > > active_file:23 inactive_file:20 isolated_file:0 >> > > unevictable:0 dirty:0 writeback:0 unstable:0 >> > > free:5550 slab_reclaimable:5184 slab_unreclaimable:4888 >> > > mapped:3 shmem:472393 pagetables:1249 bounce:0 Could you get some dumps of the entire set of OOM information? These are only tiny snippets. Also, the vmstat output from the bug: > https://bugs.freedesktop.org/show_bug.cgi?id=72742 shows there being an *AWFUL* lot of swap I/O going on here. From the looks of it, we stuck ~2GB in swap and evicted another 1.5GB of page cache (although I guess that could be double-counting tmpfs getting swapped out too). Hmmm, was this one of the cases where you actually ran _out_ of swap? > 2 0 19472 33952 296 3610324 0 19472 0 19472 1474 151 3 27 71 0 > 4 0 484964 66468 296 3175864 0 465492 0 465516 2597 1395 0 32 66 2 > 0 2 751940 23692 980 3022884 0 266976 688 266976 3681 636 0 27 66 6 > procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- > r b swpd free buff cache si so bi bo in cs us sy id wa > 2 1 1244580 295336 988 2606984 0 492896 0 492908 1237 311 1 9 50 41 > 0 2 2047996 28760 988 2037144 0 803160 0 803160 1221 1291 1 15 69 14 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>