Greetings, we've noticed situations in which the OOM killer is triggered when there appears to be plenty of swap space. See log below. This is on a device with 4 GB RAM and kernel 3.4. The swap device is /dev/zram0. The compression ratio is usually 2.5 to 3 and this load is no different from our typical load. So what may be causing this? Thanks! Luigi [15254.881681] CPU1: Package power limit normal [15419.884126] sed invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=-17, oom_score_adj=-1000 [15419.884136] Pid: 21596, comm: sed Tainted: G C 3.4.0 #1 [15419.884141] Call Trace: [15419.884151] [<ffffffff81464d61>] dump_header.isra.11+0x6f/0x17e [15419.884159] [<ffffffff811d9077>] ? ___ratelimit+0xb7/0xd4 [15419.884166] [<ffffffff81464ebc>] oom_kill_process.part.14.constprop.17+0x4c/0x248 [15419.884174] [<ffffffff8146ab78>] ? _raw_spin_unlock+0xe/0x10 [15419.884181] [<ffffffff810a42ad>] ? task_unlock+0x10/0x12 [15419.884187] [<ffffffff810a4a20>] out_of_memory+0x2a0/0x330 etc. etc. [15419.884513] lowmem_reserve[]: 0 0 0 0 [15419.884519] DMA: 1*4kB 1*8kB 0*16kB 1*32kB 2*64kB 1*128kB 1*256kB 0*512kB 2*1024kB 2*2048kB 2*4096kB = 14892kB [15419.884536] DMA32: 1376*4kB 17*8kB 29*16kB 28*32kB 15*64kB 6*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 10520kB [15419.884554] Normal: 634*4kB 4*8kB 0*16kB 3*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2664kB [15419.884570] 305503 total pagecache pages [15419.884574] 14641 pages in swap cache [15419.884578] Swap cache stats: add 9201068, delete 9186427, find 1841483/2678044 [15419.884583] Free swap = 4032196kB [15419.884586] Total swap = 5832764kB [15419.901586] 1046000 pages RAM -- 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>