Thank you for reply Willian Hermans, I already referred links you provided below and that's the reason I turned to the forums to understand If I a doing anything wrong. OR What is the right approach.
On Tuesday, 19 July 2016 22:29:20 UTC+5:30, William Hermans wrote: > > I'm not sure why you feel compelled to even bother playing with this. In > 20-21 years of using Linux I've never had to set this manually. But . . . > > > https://www.google.com/search?q=%2Fproc%2Fsys%2Fvm%2Fmin_free_kbytes&ie=utf-8 > > ----> > > https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/s-memory-tunables.html > > ----> > > Be cautious when setting this parameter, as both too-low and too-high >> values can be damaging and break your system. >> Setting *min_free_kbytes* too low prevents the system from reclaiming >> memory. This can result in system hangs and OOM-killing multiple processes. >> However, setting this parameter to a value that is too high (5-10% of >> total system memory) will cause your system to become out-of-memory >> immediately. Linux is designed to use all available RAM to cache file >> system data. Setting a high *min_free_kbytes* value results in the >> system spending too much time reclaiming memory. >> > > > > On Tue, Jul 19, 2016 at 9:11 AM, Ankur Tank <art...@gmail.com > <javascript:>> wrote: > >> >> We are using BeagleBoneBlack based custom Linux board. >> It has 256MB of RAM and 4GB of eMMC. >> Currently RFS size of the project is 163MB. While RFS partition size is >> 500MB. >> For testing, we added 20 number of big files(10MB size) and started >> firmware upgrade process. >> >> During the firmware Upgrade process we see following error when roofs is >> being written, >> >> We could solve it by changing >> /proc/sys/vm/min_free_kbytes >> >> from *2005* to *4096*. >> >> *But now my doubt is what should be the ideal value for that, what >> factors we should consider while calculating it. From the kernel >> documentation I don't get that information, * >> *but I could understand one thing that is this value can not be too low >> or too high or else system will break.* >> >> Any suggestion/pointer ? >> >> [ 6676.674219] mmcqd/1: page allocation failure: order:1, mode: >> 0x200020 >> [ 6676.674256] CPU: 0 PID: 612 Comm: mmcqd/1 Tainted: P O >> 3.12.10-005-ts-armv7l #2 >> [ 6676.674321] [<c0012d24>] (unwind_backtrace+0x0/0xf4) from [< >> c0011130>] (show_stack+0x10/0x14) >> [ 6676.674355] [<c0011130>] (show_stack+0x10/0x14) from [<c0087548>] >> (warn_alloc_failed+0xe0/0x118) >> [ 6676.674383] [<c0087548>] (warn_alloc_failed+0xe0/0x118) from [< >> c008a3ac>] (__alloc_pages_nodemask+0x74c/0x8f8) >> [ 6676.674413] [<c008a3ac>] (__alloc_pages_nodemask+0x74c/0x8f8) from >> [<c00b2e8c>] (cache_alloc_refill+0x328/0x620) >> [ 6676.674436] [<c00b2e8c>] (cache_alloc_refill+0x328/0x620) from [< >> c00b3224>] (__kmalloc+0xa0/0xe8) >> [ 6676.674471] [<c00b3224>] (__kmalloc+0xa0/0xe8) from [<c0212904>] ( >> edma_prep_slave_sg+0x84/0x388) >> [ 6676.674505] [<c0212904>] (edma_prep_slave_sg+0x84/0x388) from [< >> c02ec0a0>] (omap_hsmmc_request+0x414/0x508) >> [ 6676.674544] [<c02ec0a0>] (omap_hsmmc_request+0x414/0x508) from [< >> c02d6748>] (mmc_start_request+0xc4/0xe0) >> [ 6676.674568] [<c02d6748>] (mmc_start_request+0xc4/0xe0) from [< >> c02d7530>] (mmc_start_req+0x2d8/0x38c) >> [ 6676.674589] [<c02d7530>] (mmc_start_req+0x2d8/0x38c) from [< >> c02e4818>] (mmc_blk_issue_rw_rq+0xb4/0x9d8) >> [ 6676.674611] [<c02e4818>] (mmc_blk_issue_rw_rq+0xb4/0x9d8) from [< >> c02e52e0>] (mmc_blk_issue_rq+0x1a4/0x468) >> [ 6676.674631] [<c02e52e0>] (mmc_blk_issue_rq+0x1a4/0x468) from [< >> c02e5c68>] (mmc_queue_thread+0x88/0x118) >> [ 6676.674657] [<c02e5c68>] (mmc_queue_thread+0x88/0x118) from [< >> c004d8b8>] (kthread+0xb4/0xb8) >> [ 6676.674681] [<c004d8b8>] (kthread+0xb4/0xb8) from [<c000e298>] ( >> ret_from_fork+0x14/0x3c) >> [ 6676.674691] Mem-info: >> [ 6676.674700] Normal per-cpu: >> [ 6676.674711] CPU 0: hi: 90, btch: 15 usd: 79 >> [ 6676.674739] active_anon:4889 inactive_anon:13 isolated_anon:0 >> [ 6676.674739] active_file:8082 inactive_file:43196 isolated_file:0 >> [ 6676.674739] unevictable:422 dirty:2 writeback:1152 unstable:0 >> [ 6676.674739] free:3286 slab_reclaimable:1090 slab_unreclaimable: >> 915 >> [ 6676.674739] mapped:1593 shmem:39 pagetables:181 bounce:0 >> [ 6676.674739] free_cma:1982 >> [ 6676.674800] Normal free:13144kB min:2004kB low:2504kB high:3004kB >> active_anon:19556kB inactive_anon:52kB active_file:32328kB inactive_file: >> 172784kB unevictable:o >> [ 6676.674813] lowmem_reserve[]: 0 0 0 >> [ 6676.674831] Normal: 2584*4kB (UMC) 217*8kB (C) 57*16kB (C) 5*32kB >> (C) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB 0*8192kB = >> 13144kB >> [ 6676.674885] 51661 total pagecache pages >> [ 6676.674900] 0 pages in swap cache >> [ 6676.674910] Swap cache stats: add 0, delete 0, find 0/0 >> [ 6676.674918] Free swap = 0kB >> [ 6676.674925] Total swap = 0kB >> [ 6676.674938] SLAB: Unable to allocate memory on node 0 (gfp=0x20) >> [ 6676.674949] cache: kmalloc-8192, object size: 8192, order: 1 >> [ 6676.674962] node 0: slabs: 3/3, objs: 3/3, free: 0 >> [ 6676.674984] omap_hsmmc 481d8000.mmc: prep_slave_sg() failed >> [ 6676.674997] omap_hsmmc 481d8000.mmc: MMC start dma failure >> [ 6676.676181] mmcblk0: unknown error -1 sending read/write command, >> card status 0x900 >> [ 6676.676300] end_request: I/O error, dev mmcblk0, sector 27648 >> [ 6676.676318] Buffer I/O error on device mmcblk0p9, logical block >> 896 >> [ 6676.676329] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676401] end_request: I/O error, dev mmcblk0, sector 27656 >> [ 6676.676415] Buffer I/O error on device mmcblk0p9, logical block >> 897 >> [ 6676.676425] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676450] end_request: I/O error, dev mmcblk0, sector 27664 >> [ 6676.676461] Buffer I/O error on device mmcblk0p9, logical block >> 898 >> [ 6676.676471] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676494] end_request: I/O error, dev mmcblk0, sector 27672 >> [ 6676.676505] Buffer I/O error on device mmcblk0p9, logical block >> 899 >> [ 6676.676515] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676537] end_request: I/O error, dev mmcblk0, sector 27680 >> [ 6676.676548] Buffer I/O error on device mmcblk0p9, logical block >> 900 >> [ 6676.676558] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676580] end_request: I/O error, dev mmcblk0, sector 27688 >> [ 6676.676591] Buffer I/O error on device mmcblk0p9, logical block >> 901 >> [ 6676.676601] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676622] end_request: I/O error, dev mmcblk0, sector 27696 >> [ 6676.676634] Buffer I/O error on device mmcblk0p9, logical block >> 902 >> [ 6676.676643] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676665] end_request: I/O error, dev mmcblk0, sector 27704 >> [ 6676.676676] Buffer I/O error on device mmcblk0p9, logical block >> 903 >> [ 6676.676685] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676707] end_request: I/O error, dev mmcblk0, sector 27712 >> [ 6676.676718] Buffer I/O error on device mmcblk0p9, logical block >> 904 >> [ 6676.676728] lost page write due to I/O error on mmcblk0p9 >> [ 6676.676749] end_request: I/O error, dev mmcblk0, sector 27720 >> [ 6676.678266] mmcqd/1: page allocation failure: order:1, mode: >> 0x200020 >> [ 6676.678285] CPU: 0 PID: 612 Comm: mmcqd/1 Tainted: P O >> 3.12.10-005-ts-armv7l #2 >> [ 6676.678330] [<c0012d24>] (unwind_backtrace+0x0/0xf4) from [< >> c0011130>] (show_stack+0x10/0x14) >> [ 6676.678358] [<c0011130>] (show_stack+0x10/0x14) from [<c0087548>] >> (warn_alloc_failed+0xe0/0x118) >> [ 6676.678385] [<c0087548>] (warn_alloc_failed+0xe0/0x118) from [< >> c008a3ac>] (__alloc_pages_nodemask+0x74c/0x8f8) >> [ 6676.678412] [<c008a3ac>] (__alloc_pages_nodemask+0x74c/0x8f8) from >> [<c00b2e8c>] (cache_alloc_refill+0x328/0x620) >> [ 6676.678434] [<c00b2e8c>] (cache_alloc_refill+0x328/0x620) from [< >> c00b3224>] (__kmalloc+0xa0/0xe8) >> [ 6676.678464] [<c00b3224>] (__kmalloc+0xa0/0xe8) from [<c0212904>] ( >> edma_prep_slave_sg+0x84/0x388) >> [ 6676.678493] [<c0212904>] (edma_prep_slave_sg+0x84/0x388) from [< >> c02ec0a0>] (omap_hsmmc_request+0x414/0x508) >> [ 6676.678524] [<c02ec0a0>] (omap_hsmmc_request+0x414/0x508) from [< >> c02d6748>] (mmc_start_request+0xc4/0xe0) >> [ 6676.678547] [<c02d6748>] (mmc_start_request+0xc4/0xe0) from [< >> c02d7530>] (mmc_start_req+0x2d8/0x38c) >> [ 6676.678568] [<c02d7530>] (mmc_start_req+0x2d8/0x38c) from [< >> c02e4994>] (mmc_blk_issue_rw_rq+0x230/0x9d8) >> [ 6676.678589] [<c02e4994>] (mmc_blk_issue_rw_rq+0x230/0x9d8) from [< >> c02e52e0>] (mmc_blk_issue_rq+0x1a4/0x468) >> [ 6676.678608] [<c02e52e0>] (mmc_blk_issue_rq+0x1a4/0x468) from [< >> c02e5c68>] (mmc_queue_thread+0x88/0x118) >> [ 6676.678632] [<c02e5c68>] (mmc_queue_thread+0x88/0x118) from [< >> c004d8b8>] (kthread+0xb4/0xb8) >> [ 6676.678655] [<c004d8b8>] (kthread+0xb4/0xb8) from [<c000e298>] ( >> ret_from_fork+0x14/0x3c) >> [ 6676.678664] Mem-info: >> [ 6676.678672] Normal per-cpu: >> [ 6676.678683] CPU 0: hi: 90, btch: 15 usd: 84 >> [ 6676.678709] active_anon:4889 inactive_anon:13 isolated_anon:0 >> [ 6676.678709] active_file:8082 inactive_file:43196 isolated_file:0 >> [ 6676.678709] unevictable:422 dirty:2 writeback:896 unstable:0 >> [ 6676.678709] free:3286 slab_reclaimable:1090 slab_unreclaimable: >> 910 >> [ 6676.678709] mapped:1593 shmem:39 pagetables:181 bounce:0 >> [ 6676.678709] free_cma:1982 >> [ 6676.678764] Normal free:13144kB min:2004kB low:2504kB high:3004kB >> active_anon:19556kB inactive_anon:52kB active_file:32328kB inactive_file: >> 172784kB unevictable:o >> [ 6676.678776] lowmem_reserve[]: 0 0 0 >> [ 6676.678791] Normal: 2584*4kB (UMC) 217*8kB (C) 57*16kB (C) 5*32kB >> (C) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB 0*8192kB = >> 13144kB >> [ 6676.678842] 51661 total pagecache pages >> [ 6676.678854] 0 pages in swap cache >> [ 6676.678864] Swap cache stats: add 0, delete 0, find 0/0 >> [ 6676.678871] Free swap = 0kB >> [ 6676.678878] Total swap = 0kB >> [ 6676.678898] omap_hsmmc 481d8000.mmc: prep_slave_sg() failed >> [ 6676.678911] omap_hsmmc 481d8000.mmc: MMC start dma failure >> [ 6676.679631] mmcblk0: unknown error -1 sending read/write command, >> card status 0x900 >> [ 6676.681433] mmcqd/1: page allocation failure: order:1, mode: >> 0x200020 >> [ 6676.681455] CPU: 0 PID: 612 Comm: mmcqd/1 Tainted: P O >> 3.12.10-005-ts-armv7l #2 >> [ 6676.681494] [<c0012d24>] (unwind_backtrace+0x0/0xf4) from [< >> c0011130>] (show_stack+0x10/0x14) >> [ 6676.681523] [<c0011130>] (show_stack+0x10/0x14) from [<c0087548>] >> (warn_alloc_failed+0xe0/0x118) >> [ 6676.681546] [<c0087548>] (warn_alloc_failed+0xe0/0x118) from [< >> c008a3ac>] (__alloc_pages_nodemask+0x74c/0x8f8) >> [ 6676.681570] [<c008a3ac>] (__alloc_pages_nodemask+0x74c/0x8f8) from >> [<c00b2e8c>] (cache_alloc_refill+0x328/0x620) >> [ 6676.681592] [<c00b2e8c>] (cache_alloc_refill+0x328/0x620) from [< >> c00b3224>] (__kmalloc+0xa0/0xe8) >> [ 6676.681618] [<c00b3224>] (__kmalloc+0xa0/0xe8) from [<c0212904>] ( >> edma_prep_slave_sg+0x84/0x388) >> [ 6676.681644] [<c0212904>] (edma_prep_slave_sg+0x84/0x388) from [< >> c02ec0a0>] (omap_hsmmc_request+0x414/0x508) >> [ 6676.681673] [<c02ec0a0>] (omap_hsmmc_request+0x414/0x508) from [< >> c02d6748>] (mmc_start_request+0xc4/0xe0) >> [ 6676.681695] [<c02d6748>] (mmc_start_request+0xc4/0xe0) from [< >> c02d7530>] (mmc_start_req+0x2d8/0x38c) >> [ 6676.681715] [<c02d7530>] (mmc_start_req+0x2d8/0x38c) from [< >> c02e4994>] (mmc_blk_issue_rw_rq+0x230/0x9d8) >> [ 6676.681735] [<c02e4994>] (mmc_blk_issue_rw_rq+0x230/0x9d8) from [< >> c02e52e0>] (mmc_blk_issue_rq+0x1a4/0x468) >> [ 6676.681755] [<c02e52e0>] (mmc_blk_issue_rq+0x1a4/0x468) from [< >> c02e5c68>] (mmc_queue_thread+0x88/0x118) >> [ 6676.681778] [<c02e5c68>] (mmc_queue_thread+0x88/0x118) from [< >> c004d8b8>] (kthread+0xb4/0xb8) >> [ 6676.681800] [<c004d8b8>] (kthread+0xb4/0xb8) from [<c000e298>] ( >> ret_from_fork+0x14/0x3c) >> [ 6676.681809] Mem-info: >> [ 6676.681816] Normal per-cpu: >> [ 6676.681826] CPU 0: hi: 90, btch: 15 usd: 88 >> [ 6676.681852] active_anon:4889 inactive_anon:13 isolated_anon:0 >> [ 6676.681852] active_file:8082 inactive_file:43196 isolated_file:0 >> [ 6676.681852] unevictable:422 dirty:2 writeback:768 unstable:0 >> [ 6676.681852] free:3286 slab_reclaimable:1090 slab_unreclaimable: >> 906 >> [ 6676.681852] mapped:1593 shmem:39 pagetables:181 bounce:0 >> [ 6676.681852] free_cma:1982 >> [ 6676.681908] Normal free:13144kB min:2004kB low:2504kB high:3004kB >> active_anon:19556kB inactive_anon:52kB active_file:32328kB inactive_file: >> 172784kB unevictable:o >> 2016-07-19T06:47:28.562553-04:00 kernel: [ 6676.681920] >> lowmem_reserve[]: 0 0 0 >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/5955e7cb-9c9b-43b3-a095-0af08d67a062%40googlegroups.com >> >> <https://groups.google.com/d/msgid/beagleboard/5955e7cb-9c9b-43b3-a095-0af08d67a062%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/dc56b549-ee20-406d-8a12-ca691c985bb7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
