On Thu, Oct 05, 2017 at 03:04:58PM +0530, priyaranjan wrote: > Hello All, > > I'm having issues on DRA7x based Android system where migrating from a > 2GB RAM configuration to 4GB RAM has forced us to enable LPAE. In the > LPAE configuration, OOM killer causes issues as the system becomes > heavily loaded, but this issue does not occur on our more stable 2GB / > non-lpae baseline. Is you DMA zone occupied by CMA memory? How about enabling LPAE with 2GM DRAM config first? > > >From what I understand, this is happening because we run out of low > memory. LPAE does place a marginally higher demand on lowmem in terms > of page tables, kernel size, etc. But still not sure of an exact root > cause. > > Tuning/reducing vmalloc in the kernel command line seems to improve > the situation, but at the expense of introducing binder issues (since > binder uses vmalloc extensively). > > Can anyone help me regarding this? See below example log. > > Software details - 4.4 kernel + Android 6.0 / marshmallow based on > 6AM1.3 Texas Instrument release. > > > [ 0.000000] CPU: ARMv7 Processor [412fc0f2] revision 2 (ARMv7), cr=30c5387d > > [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache > > [ 0.000000] Machine model: TI DRA742 > > [ 0.000000] Reserved memory: created CMA memory pool at > 0x0000000095800000, size 56 MiB > > [ 0.000000] Reserved memory: initialized node ipu2_cma@95800000, > compatible id shared-dma-pool > > [ 0.000000] Reserved memory: created CMA memory pool at > 0x0000000099000000, size 64 MiB > > [ 0.000000] Reserved memory: initialized node dsp1_cma@99000000, > compatible id shared-dma-pool > > [ 0.000000] Reserved memory: created CMA memory pool at > 0x000000009d000000, size 32 MiB > > [ 0.000000] Reserved memory: initialized node ipu1_cma@9d000000, > compatible id shared-dma-pool > > [ 0.000000] Reserved memory: created CMA memory pool at > 0x000000009f000000, size 16 MiB > > [ 0.000000] Reserved memory: initialized node dsp2_cma@9f000000, > compatible id shared-dma-pool > > [ 0.000000] cma: Reserved 24 MiB at 0x00000000fd800000 > > [ 0.000000] Forcing write-allocate cache policy for SMP > > [ 0.000000] Memory policy: Data cache writealloc > > [ 0.000000] OMAP4: Map 0x000000027fd00000 to fe600000 for dram barrier > > [ 0.000000] On node 0 totalpages: 1042176 > > [ 0.000000] free_area_init_node: node 0, pgdat c0e855c0, > node_mem_map ee39e000 > > [ 0.000000] DMA zone: 1608 pages used for memmap > > [ 0.000000] DMA zone: 0 pages reserved > > [ 0.000000] DMA zone: 204800 pages, LIFO batch:31 > > [ 0.000000] HighMem zone: 837376 pages, LIFO batch:31 > > [ 0.000000] DRA752 ES2.0 > > [ 0.000000] PERCPU: Embedded 13 pages/cpu @ee320000 s22592 r8192 > d22464 u53248 > > [ 0.000000] pcpu-alloc: s22592 r8192 d22464 u53248 alloc=13*4096 > > [ 0.000000] pcpu-alloc: [0] 0 [0] 1 > > [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. > Total pages: 1040568 > > ... > > > [ 0.000000] Memory: 3818136K/4168704K available (6701K kernel code, > 577K rwdata, 1724K rodata, 2048K init, 381K bss, 153960K reserved, > 196608K cma-reserved, 3324928K highmem) > > [ 0.000000] Virtual kernel memory layout: > > [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) > > [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB) > > [ 0.000000] vmalloc : 0xf2800000 - 0xff800000 ( 208 MB) > > [ 0.000000] lowmem : 0xc0000000 - 0xf2400000 ( 804 MB) > > [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) > > [ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB) > > [ 0.000000] .text : 0xc0008000 - 0xc088b4e0 (8718 kB) > > [ 0.000000] .init : 0xc0c00000 - 0xc0e00000 (2048 kB) > > [ 0.000000] .data : 0xc0e00000 - 0xc0e90624 ( 578 kB) > > [ 0.000000] .bss : 0xc0e92000 - 0xc0ef160c ( 382 kB) > > [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 > > > .... > > [ 66.801410] logd.writer invoked oom-killer: gfp_mask=0x24000d0, > order=0, oom_score_adj=-1000 > > [ 66.805748] CPU: 0 PID: 113 Comm: logd.writer Tainted: G W > O 4.4.45+ #12 > > [ 66.809599] Hardware name: Generic DRA74X (Flattened Device Tree) > > [ 66.812681] [<c020fe8c>] (unwind_backtrace) from [<c020bd34>] > (show_stack+0x20/0x24) > > [ 66.816580] [<c020bd34>] (show_stack) from [<c04bb334>] > (dump_stack+0xb8/0xe4) > > [ 66.820217] [<c04bb334>] (dump_stack) from [<c03395a4>] > (dump_header+0x5c/0x16c) > > [ 66.823940] [<c03395a4>] (dump_header) from [<c02f00d0>] > (oom_kill_process+0x318/0x460) > > [ 66.827967] [<c02f00d0>] (oom_kill_process) from [<c02f0594>] > (out_of_memory+0x304/0x350) > > [ 66.832082] [<c02f0594>] (out_of_memory) from [<c02f55f0>] > (__alloc_pages_nodemask+0x874/0x998) > > [ 66.836459] [<c02f55f0>] (__alloc_pages_nodemask) from [<c02f5734>] > (__get_free_pages+0x20/0x3c) > > [ 66.840878] [<c02f5734>] (__get_free_pages) from [<c0392170>] > (proc_pid_cmdline_read+0xa4/0x5a8) > > [ 66.845296] [<c0392170>] (proc_pid_cmdline_read) from [<c033be54>] > (__vfs_read+0x34/0xe0) > > [ 66.849408] [<c033be54>] (__vfs_read) from [<c033c69c>] (vfs_read+0x8c/0x118) > > [ 66.852997] [<c033c69c>] (vfs_read) from [<c033cfa0>] (SyS_read+0x4c/0xa0) > > [ 66.856456] [<c033cfa0>] (SyS_read) from [<c0207e00>] > (ret_fast_syscall+0x0/0x1c) > > [ 66.860655] Mem-Info: > > [ 66.861896] active_anon:233918 inactive_anon:25216 isolated_anon:0 > > [ 66.861896] active_file:20206 inactive_file:111218 isolated_file:0 > > [ 66.861896] unevictable:0 dirty:0 writeback:0 unstable:0 > > [ 66.861896] slab_reclaimable:3063 slab_unreclaimable:6164 > > [ 66.861896] mapped:157484 shmem:25476 pagetables:7490 bounce:23 > > [ 66.861896] free:496396 free_pcp:435 free_cma:15302 > > [ 66.880653] DMA free:42104kB min:2808kB low:7408kB high:8112kB > active_anon:86236kB inactive_anon:99528kB active_file:144kB > inactive_file:0kB unevictable:0kB isolated(anon):0kB > isolated(file):68kB present:819200kB managed:668108kB mlocked:0kB > dirty:0kB writeback:0kB mapped:252512kB shmem:99576kB > slab_reclaimable:12252kB slab_unreclaimable:24656kB > kernel_stack:10856kB pagetables:3404kB unstable:0kB bounce:92kB > free_pcp:1284kB local_pcp:628kB free_cma:38780kB writeback_tmp:0kB > pages_scanned:0 all_unreclaimable? no > > [ 66.904623] lowmem_reserve[]: 0 0 6494 6494 > > [ 66.907897] HighMem free:1943088kB min:512kB low:23580kB > high:27100kB active_anon:849436kB inactive_anon:1440kB > active_file:80784kB inactive_file:444956kB unevictable:0kB > isolated(anon):0kB isolated(file):0kB present:3349504kB > managed:3349504kB mlocked:0kB dirty:0kB writeback:0kB mapped:377572kB > shmem:2480kB slab_reclaimable:0kB slab_unreclaimable:0kB > kernel_stack:0kB pagetables:26556kB unstable:0kB bounce:0kB > free_pcp:352kB local_pcp:224kB free_cma:22428kB writeback_tmp:0kB > pages_scanned:0 all_unreclaimable? no > > [ 66.933683] lowmem_reserve[]: 0 0 0 0 > > [ 66.936089] DMA: 679*4kB (UMEC) 234*8kB (UMEC) 100*16kB (UMC) > 27*32kB (MC) 12*64kB (C) 4*128kB (C) 4*256kB (C) 0*512kB 0*1024kB > 0*2048kB 8*4096kB (C) = 42124kB > > [ 66.944113] HighMem: 8685*4kB (MC) 4196*8kB (MC) 2162*16kB (UMC) > 1244*32kB (UMC) 679*64kB (MC) 187*128kB (MC) 63*256kB (UMC) 25*512kB > (M) 20*1024kB (UMC) 6*2048kB (M) 408*4096kB (MC) = 1942964kB > > [ 66.954296] 157051 total pagecache pages > > [ 66.956536] 0 pages in swap cache > > [ 66.958342] Swap cache stats: add 0, delete 0, find 0/0 > > [ 66.961208] Free swap = 0kB > > [ 66.962769] Total swap = 0kB > > [ 66.965069] 1042176 pages RAM > > [ 66.967429] 837376 pages HighMem/MovableOnly > > [ 66.969836] 37773 pages reserved > > [ 66.971648] 49152 pages cma reserved > > Regards, > Priyaranjan > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
