* Fwd: bcache and memory at boot. Bug? [not found] <CAPBO7TYBMn=oU8K-6EGzw2LofwHPHm742GbzgGYmdbHt5g7sNQ@mail.gmail.com> @ 2014-02-08 8:53 ` Josep Lladonosa 2014-02-10 11:40 ` Gabriel de Perthuis 0 siblings, 1 reply; 7+ messages in thread From: Josep Lladonosa @ 2014-02-08 8:53 UTC (permalink / raw) To: linux-bcache@vger.kernel.org Hello, I am using bcache in my laptop (RAM 32 GiB). I have been using it perfectly for a month. ext4 + bcache. Yesterday, system did not want do to a normal startup. Messages where from udev out of memory (and udevadm killed?) and system was not mounting / (/dev/bcache0). After verifying/trying some things I found that: bcache tries to prepare /dev/bcache0 but something happens (udev related?) and the caching device is slave of it. If bcache can go on, then prepares /dev/bcache1 with the same caching device and the backing device. # ls /sys/block/bcache?/slaves /sys/block/bcache0/slaves: sda1 /sys/block/bcache1/slaves: sda1 sdb7 # cat /sys/block/bcache?/stat 418 0 3344 0 0 0 0 0 0 0 0 137372 0 2151740 456928 2476 0 138440 46252 0 0 0 so mounting /dev/bcache1 allows normal startup, but with something messed up, I guess. I got two ways for booting: 1) If I boot with only 16 GiB of RAM, it runs O.K. (physically only 16 GiB or with boot parameter mem=16G - mem=17G also boots; mem=20G does not boot well) 2) booting with /dev/bcache1 as the root filesystem. In this second case, I can see dmesg, so here it goes: [ 3.619572] bcache: bch_journal_replay() journal replay done, 754 keys in 46 entries, seq 443121 [ 6.746571] bcache-register invoked oom-killer: gfp_mask=0x82d2, order=0, oom_score_adj=0 [ 6.746575] bcache-register cpuset=/ mems_allowed=0 [ 6.746578] CPU: 1 PID: 296 Comm: bcache-register Not tainted 3.12.9 #1 [ 6.746580] Hardware name: Micro-Star International Co., Ltd. GT60/MS-16F3, BIOS E16F3IMS.10U 01/21/2013 [ 6.746581] 0000ebc8000000e3 ffffffff8137e021 ffff8800371ab0c0 ffffffff8137c481 [ 6.746584] ffffffff8138110e ffffffff8138038b 0000000000000020 ffffffff810363f2 [ 6.746587] ffffffff81099f9b ffff880803afa040 ffffffff814fb060 0000000000000000 [ 6.746589] Call Trace: [ 6.746596] [<ffffffff8137e021>] ? dump_stack+0x41/0x51 [ 6.746599] [<ffffffff8137c481>] ? dump_header+0x70/0x1a2 [ 6.746601] [<ffffffff8138110e>] ? _cond_resched+0x5/0x14 [ 6.746604] [<ffffffff8138038b>] ? mutex_lock+0x9/0x25 [ 6.746608] [<ffffffff810363f2>] ? put_online_cpus+0x1e/0x64 [ 6.746612] [<ffffffff81099f9b>] ? rcu_oom_notify+0xc0/0xd2 [ 6.746614] [<ffffffff810bee32>] ? oom_kill_process+0x6f/0x2c0 [ 6.746616] [<ffffffff810bf590>] ? out_of_memory+0x3d8/0x3f1 [ 6.746619] [<ffffffff810c365d>] ? __alloc_pages_nodemask+0x64e/0x7d0 [ 6.746624] [<ffffffff810f0f15>] ? alloc_pages_current+0xef/0x109 [ 6.746627] [<ffffffff810e70aa>] ? __vmalloc_node_range+0x143/0x1de [ 6.746635] [<ffffffffa01d7d1c>] ? bcache_device_init+0x81/0x241 [bcache] [ 6.746637] [<ffffffff810e7171>] ? __vmalloc_node+0x2c/0x31 [ 6.746642] [<ffffffffa01d7d1c>] ? bcache_device_init+0x81/0x241 [bcache] [ 6.746645] [<ffffffff810e71ab>] ? vzalloc+0x21/0x22 [ 6.746649] [<ffffffffa01d7d1c>] ? bcache_device_init+0x81/0x241 [bcache] [ 6.746653] [<ffffffffa01d805e>] ? flash_dev_run+0x7d/0x12b [bcache] [ 6.746658] [<ffffffffa01d988b>] ? run_cache_set+0x5c4/0x695 [bcache] [ 6.746664] [<ffffffffa01dae47>] ? register_bcache+0x10a0/0x12d9 [bcache] [ 6.746666] [<ffffffff810f0f15>] ? alloc_pages_current+0xef/0x109 [ 6.746670] [<ffffffff81159855>] ? sysfs_write_file+0xcf/0x103 [ 6.746674] [<ffffffff81106a23>] ? vfs_write+0xa8/0x10b [ 6.746677] [<ffffffff8110705e>] ? SyS_write+0x41/0x74 [ 6.746680] [<ffffffff81386ca2>] ? system_call_fastpath+0x16/0x1b [ 6.746682] Mem-Info: [ 6.746683] Node 0 DMA per-cpu: [ 6.746685] CPU 0: hi: 0, btch: 1 usd: 0 [ 6.746686] CPU 1: hi: 0, btch: 1 usd: 0 [ 6.746687] CPU 2: hi: 0, btch: 1 usd: 0 [ 6.746688] CPU 3: hi: 0, btch: 1 usd: 0 [ 6.746689] CPU 4: hi: 0, btch: 1 usd: 0 [ 6.746691] CPU 5: hi: 0, btch: 1 usd: 0 [ 6.746692] CPU 6: hi: 0, btch: 1 usd: 0 [ 6.746693] CPU 7: hi: 0, btch: 1 usd: 0 [ 6.746694] Node 0 DMA32 per-cpu: [ 6.746695] CPU 0: hi: 186, btch: 31 usd: 157 [ 6.746697] CPU 1: hi: 186, btch: 31 usd: 94 [ 6.746698] CPU 2: hi: 186, btch: 31 usd: 96 [ 6.746699] CPU 3: hi: 186, btch: 31 usd: 81 [ 6.746700] CPU 4: hi: 186, btch: 31 usd: 169 [ 6.746701] CPU 5: hi: 186, btch: 31 usd: 50 [ 6.746702] CPU 6: hi: 186, btch: 31 usd: 40 [ 6.746704] CPU 7: hi: 186, btch: 31 usd: 84 [ 6.746704] Node 0 Normal per-cpu: [ 6.746706] CPU 0: hi: 186, btch: 31 usd: 108 [ 6.746707] CPU 1: hi: 186, btch: 31 usd: 112 [ 6.746708] CPU 2: hi: 186, btch: 31 usd: 127 [ 6.746709] CPU 3: hi: 186, btch: 31 usd: 176 [ 6.746710] CPU 4: hi: 186, btch: 31 usd: 166 [ 6.746711] CPU 5: hi: 186, btch: 31 usd: 169 [ 6.746712] CPU 6: hi: 186, btch: 31 usd: 117 [ 6.746714] CPU 7: hi: 186, btch: 31 usd: 174 [ 6.746717] active_anon:2478 inactive_anon:19 isolated_anon:0 [ 6.746717] active_file:364 inactive_file:271 isolated_file:0 [ 6.746717] unevictable:10512 dirty:0 writeback:0 unstable:0 [ 6.746717] free:51389 slab_reclaimable:1259 slab_unreclaimable:3625 [ 6.746717] mapped:328 shmem:32 pagetables:490 bounce:0 [ 6.746717] free_cma:0 [ 6.746720] Node 0 DMA free:15896kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15984kB managed:15900kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:4kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes [ 6.746725] lowmem_reserve[]: 0 3146 32125 32125 [ 6.746727] Node 0 DMA32 free:123128kB min:6616kB low:8268kB high:9924kB active_anon:1508kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:3296400kB managed:3224152kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB shmem:12kB slab_reclaimable:192kB slab_unreclaimable:556kB kernel_stack:24kB pagetables:144kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes [ 6.746732] lowmem_reserve[]: 0 0 28978 28978 [ 6.746734] Node 0 Normal free:66532kB min:60932kB low:76164kB high:91396kB active_anon:8404kB inactive_anon:76kB active_file:1084kB inactive_file:1084kB unevictable:42632kB isolated(anon):0kB isolated(file):0kB present:30136320kB managed:29673756kB mlocked:0kB dirty:0kB writeback:0kB mapped:1308kB shmem:116kB slab_reclaimable:4844kB slab_unreclaimable:13940kB kernel_stack:1088kB pagetables:1816kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:192 all_unreclaimable? no [ 6.746739] lowmem_reserve[]: 0 0 0 0 [ 6.746741] Node 0 DMA: 0*4kB 1*8kB (U) 1*16kB (U) 0*32kB 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (R) 3*4096kB (M) = 15896kB [ 6.746750] Node 0 DMA32: 2*4kB (EM) 4*8kB (UEM) 1*16kB (U) 2*32kB (E) 2*64kB (UM) 2*128kB (UM) 3*256kB (U) 6*512kB (UM) 6*1024kB (EM) 7*2048kB (UEMR) 24*4096kB (MR) = 123128kB [ 6.746759] Node 0 Normal: 7*4kB (M) 15*8kB (UEM) 14*16kB (UM) 11*32kB (UEM) 3*64kB (UM) 1*128kB (M) 6*256kB (UE) 4*512kB (UEM) 4*1024kB (UM) 3*2048kB (UEM) 13*4096kB (MR) = 68116kB [ 6.746770] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB [ 6.746771] 11149 total pagecache pages [ 6.746773] 0 pages in swap cache [ 6.746774] Swap cache stats: add 0, delete 0, find 0/0 [ 6.746775] Free swap = 0kB [ 6.746776] Total swap = 0kB [ 6.814488] 8386047 pages RAM [ 6.814490] 157595 pages reserved [ 6.814491] 4560 pages shared [ 6.814492] 8169064 pages non-shared [ 6.814493] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name [ 6.814501] [ 90] 0 90 1202 159 8 0 0 udev [ 6.814503] [ 92] 0 92 6261 340 17 0 -1000 systemd-udevd [ 6.814505] [ 94] 0 94 6162 214 17 0 0 systemd-udevd [ 6.814507] [ 96] 0 96 6228 238 17 0 0 systemd-udevd [ 6.814508] [ 97] 0 97 6228 257 17 0 0 systemd-udevd [ 6.814510] [ 99] 0 99 6228 238 17 0 0 systemd-udevd [ 6.814512] [ 100] 0 100 6228 259 17 0 0 systemd-udevd [ 6.814514] [ 101] 0 101 6228 258 17 0 0 systemd-udevd [ 6.814516] [ 103] 0 103 6228 229 17 0 0 systemd-udevd [ 6.814517] [ 105] 0 105 6228 222 17 0 0 systemd-udevd [ 6.814519] [ 106] 0 106 6228 223 17 0 0 systemd-udevd [ 6.814521] [ 107] 0 107 6228 232 17 0 0 systemd-udevd [ 6.814523] [ 112] 0 112 6228 244 17 0 0 systemd-udevd [ 6.814525] [ 113] 0 113 6228 244 17 0 0 systemd-udevd [ 6.814526] [ 116] 0 116 6228 235 17 0 0 systemd-udevd [ 6.814528] [ 117] 0 117 6228 241 17 0 0 systemd-udevd [ 6.814530] [ 119] 0 119 5931 241 17 0 0 udevadm [ 6.814532] [ 120] 0 120 6228 235 17 0 0 systemd-udevd [ 6.814534] [ 121] 0 121 6228 235 17 0 0 systemd-udevd [ 6.814535] [ 123] 0 123 6228 236 17 0 0 systemd-udevd [ 6.814537] [ 126] 0 126 6228 236 17 0 0 systemd-udevd [ 6.814539] [ 127] 0 127 6228 236 17 0 0 systemd-udevd [ 6.814541] [ 129] 0 129 6228 236 17 0 0 systemd-udevd [ 6.814542] [ 130] 0 130 6228 236 17 0 0 systemd-udevd [ 6.814544] [ 133] 0 133 6228 236 17 0 0 systemd-udevd [ 6.814546] [ 137] 0 137 6228 242 17 0 0 systemd-udevd [ 6.814548] [ 139] 0 139 6228 243 17 0 0 systemd-udevd [ 6.814552] [ 296] 0 296 1202 160 8 0 0 bcache-register [ 6.814554] [ 319] 0 319 1202 160 8 0 0 bcache-register [ 6.814556] Out of memory: Kill process 90 (udev) score 0 or sacrifice child [ 6.814612] Killed process 119 (udevadm) total-vm:23724kB, anon-rss:204kB, file-rss:760kB [ 6.823222] bcache-register invoked oom-killer: gfp_mask=0x82d2, order=0, oom_score_adj=0 [ 6.823226] bcache-register cpuset=/ mems_allowed=0 [ 6.823229] CPU: 1 PID: 296 Comm: bcache-register Not tainted 3.12.9 #1 Thanks, Josep -- -- Salutacions...Josep -- -- -- Salutacions...Josep -- ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: bcache and memory at boot. Bug? 2014-02-08 8:53 ` Fwd: bcache and memory at boot. Bug? Josep Lladonosa @ 2014-02-10 11:40 ` Gabriel de Perthuis 2014-02-10 13:15 ` Josep Lladonosa 0 siblings, 1 reply; 7+ messages in thread From: Gabriel de Perthuis @ 2014-02-10 11:40 UTC (permalink / raw) To: linux-bcache > Hello, > > I am using bcache in my laptop (RAM 32 GiB). I have been using it > perfectly for a month. ext4 + bcache. > > Yesterday, system did not want do to a normal startup. Messages where > from udev out of memory (and udevadm killed?) and system was not > mounting / (/dev/bcache0). > > [ 6.823222] bcache-register invoked oom-killer: gfp_mask=0x82d2, > order=0, oom_score_adj=0 Build your kernel with CONFIG_COMPACTION. I've added it to the FAQ: http://bcache.evilpiepirate.org/~kent/bcache/FAQ/ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: bcache and memory at boot. Bug? 2014-02-10 11:40 ` Gabriel de Perthuis @ 2014-02-10 13:15 ` Josep Lladonosa 2014-02-10 22:46 ` Kent Overstreet 0 siblings, 1 reply; 7+ messages in thread From: Josep Lladonosa @ 2014-02-10 13:15 UTC (permalink / raw) To: Gabriel de Perthuis; +Cc: linux-bcache@vger.kernel.org On 10 February 2014 12:40, Gabriel de Perthuis <g2p.code@gmail.com> wrote: >> Hello, >> >> I am using bcache in my laptop (RAM 32 GiB). I have been using it >> perfectly for a month. ext4 + bcache. >> >> Yesterday, system did not want do to a normal startup. Messages where >> from udev out of memory (and udevadm killed?) and system was not >> mounting / (/dev/bcache0). >> >> [ 6.823222] bcache-register invoked oom-killer: gfp_mask=0x82d2, >> order=0, oom_score_adj=0 > > Build your kernel with CONFIG_COMPACTION. I've added it to the FAQ: > http://bcache.evilpiepirate.org/~kent/bcache/FAQ/ Hello Gabriel, Thanks for your reply. My .config file has already: ... CONFIG_COMPACTION=y ... I have been digging around to find information and sometimes bugs come related to unsigned variables and their operations when storing large numbers (reserved memory?). Kernel is 64 bits. Memory is 32 GiB. Perhaps it could happen that the allocated memory is not totally freed. When kernel has been able to boot with 32 GiB (having bcache0 messed up and bcache1 mountable), it seems that bcache has more than 16 GiB allocated and kept. -Free memory with kernel 3.11.0-rc7 with 32GiB and bcache0 (halved?) and bcache1 (mounted) $ head -2 /proc/meminfo MemTotal: 32913872 kB MemFree: 12376640 kB - Free memory with kernel 3.12.9 with mem=16G and bcache0 (mounted) $ head -2 /proc/meminfo MemTotal: 15602144 kB MemFree: 14005372 kB > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- -- Salutacions...Josep -- ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: bcache and memory at boot. Bug? 2014-02-10 13:15 ` Josep Lladonosa @ 2014-02-10 22:46 ` Kent Overstreet 2014-02-11 10:56 ` Josep Lladonosa 0 siblings, 1 reply; 7+ messages in thread From: Kent Overstreet @ 2014-02-10 22:46 UTC (permalink / raw) To: Josep Lladonosa; +Cc: Gabriel de Perthuis, linux-bcache@vger.kernel.org On Mon, Feb 10, 2014 at 02:15:14PM +0100, Josep Lladonosa wrote: > On 10 February 2014 12:40, Gabriel de Perthuis <g2p.code@gmail.com> wrote: > >> Hello, > >> > >> I am using bcache in my laptop (RAM 32 GiB). I have been using it > >> perfectly for a month. ext4 + bcache. > >> > >> Yesterday, system did not want do to a normal startup. Messages where > >> from udev out of memory (and udevadm killed?) and system was not > >> mounting / (/dev/bcache0). > >> > >> [ 6.823222] bcache-register invoked oom-killer: gfp_mask=0x82d2, > >> order=0, oom_score_adj=0 > > > > Build your kernel with CONFIG_COMPACTION. I've added it to the FAQ: > > http://bcache.evilpiepirate.org/~kent/bcache/FAQ/ > > > Hello Gabriel, > > Thanks for your reply. > > My .config file has already: > ... > CONFIG_COMPACTION=y I looked at the allocations done in bcache_device_init(), those aren't high order page allocations (they're vmalloc allocations) so compaction won't help here. > ... > > I have been digging around to find information and sometimes bugs come > related to unsigned variables and their operations when storing large > numbers (reserved memory?). Kernel is 64 bits. Memory is 32 GiB. > Perhaps it could happen that the allocated memory is not totally > freed. > > When kernel has been able to boot with 32 GiB (having bcache0 messed > up and bcache1 mountable), it seems that bcache has more than 16 GiB > allocated and kept. Woah, really? If so that's bad - I don't see how that follows (or am I misreading) from your numbers, can you show a before and after when you bring bcache up? > > -Free memory with kernel 3.11.0-rc7 with 32GiB and bcache0 (halved?) > and bcache1 (mounted) > > $ head -2 /proc/meminfo > MemTotal: 32913872 kB > MemFree: 12376640 kB > > > - Free memory with kernel 3.12.9 with mem=16G and bcache0 (mounted) > > $ head -2 /proc/meminfo > MemTotal: 15602144 kB > MemFree: 14005372 kB > > > > > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > -- > Salutacions...Josep > -- > -- > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: bcache and memory at boot. Bug? 2014-02-10 22:46 ` Kent Overstreet @ 2014-02-11 10:56 ` Josep Lladonosa [not found] ` <1392117811.5355.YahooMailNeo@web181506.mail.ne1.yahoo.com> 0 siblings, 1 reply; 7+ messages in thread From: Josep Lladonosa @ 2014-02-11 10:56 UTC (permalink / raw) To: Kent Overstreet; +Cc: Gabriel de Perthuis, linux-bcache@vger.kernel.org On 10 February 2014 23:46, Kent Overstreet <kmo@daterainc.com> wrote: > On Mon, Feb 10, 2014 at 02:15:14PM +0100, Josep Lladonosa wrote: >> On 10 February 2014 12:40, Gabriel de Perthuis <g2p.code@gmail.com> wrote: >> >> Hello, >> >> >> >> I am using bcache in my laptop (RAM 32 GiB). I have been using it >> >> perfectly for a month. ext4 + bcache. >> >> >> >> Yesterday, system did not want do to a normal startup. Messages where >> >> from udev out of memory (and udevadm killed?) and system was not >> >> mounting / (/dev/bcache0). >> >> >> >> [ 6.823222] bcache-register invoked oom-killer: gfp_mask=0x82d2, >> >> order=0, oom_score_adj=0 >> > >> > Build your kernel with CONFIG_COMPACTION. I've added it to the FAQ: >> > http://bcache.evilpiepirate.org/~kent/bcache/FAQ/ >> >> >> Hello Gabriel, >> >> Thanks for your reply. >> >> My .config file has already: >> ... >> CONFIG_COMPACTION=y > > I looked at the allocations done in bcache_device_init(), those aren't high > order page allocations (they're vmalloc allocations) so compaction won't help > here. > >> ... >> >> I have been digging around to find information and sometimes bugs come >> related to unsigned variables and their operations when storing large >> numbers (reserved memory?). Kernel is 64 bits. Memory is 32 GiB. >> Perhaps it could happen that the allocated memory is not totally >> freed. >> >> When kernel has been able to boot with 32 GiB (having bcache0 messed >> up and bcache1 mountable), it seems that bcache has more than 16 GiB >> allocated and kept. > > Woah, really? If so that's bad - I don't see how that follows (or am I > misreading) from your numbers, can you show a before and after when you bring > bcache up? What I have done is: - boot computer in Debian (kernel&bcache-tools ready) from an USB with the caching device unplugged and backing plugged. Booting O.K. with 32 GiB of RAM. - plug caching device to external SATA. Bcache detects it, but... - bcache0 and bcache1 are shown (I could do a fast "ls" for /sys/block). - After some seconds, system freezes. I could detach cahing device and remake it and see if the same happens again, but anyway the cause of this behaviour will still be there. Josep > >> >> -Free memory with kernel 3.11.0-rc7 with 32GiB and bcache0 (halved?) >> and bcache1 (mounted) >> >> $ head -2 /proc/meminfo >> MemTotal: 32913872 kB >> MemFree: 12376640 kB >> >> >> - Free memory with kernel 3.12.9 with mem=16G and bcache0 (mounted) >> >> $ head -2 /proc/meminfo >> MemTotal: 15602144 kB >> MemFree: 14005372 kB >> >> >> >> > >> > >> > -- >> > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >> > the body of a message to majordomo@vger.kernel.org >> > More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> >> >> -- >> -- >> Salutacions...Josep >> -- >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- -- Salutacions...Josep -- ^ permalink raw reply [flat|nested] 7+ messages in thread
[parent not found: <1392117811.5355.YahooMailNeo@web181506.mail.ne1.yahoo.com>]
[parent not found: <CAPBO7TbeuHqur3oi9q82d6_MBG9dw=XcZ7yQyV6iSEx2uDuiMQ@mail.gmail.com>]
* Fwd: bcache and memory at boot. Bug? [not found] ` <CAPBO7TbeuHqur3oi9q82d6_MBG9dw=XcZ7yQyV6iSEx2uDuiMQ@mail.gmail.com> @ 2014-02-26 16:03 ` Josep Lladonosa 2014-02-26 16:38 ` Josep Lladonosa 0 siblings, 1 reply; 7+ messages in thread From: Josep Lladonosa @ 2014-02-26 16:03 UTC (permalink / raw) To: linux-bcache@vger.kernel.org Hello, I forward some information wich was missing in the list. After this I write another message with some (good news for me and) information about things that I have found. Josep ---------- Forwarded message ---------- From: Josep Lladonosa <jlladono@gmail.com> Date: 11 February 2014 17:39 Subject: Re: bcache and memory at boot. Bug? To: matthew patton <pattonme@yahoo.com> On 11 February 2014 12:23, matthew patton <pattonme@yahoo.com> wrote: > > > >>> -Free memory with kernel 3.11.0-rc7 with 32GiB and bcache0 (halved?) >>>> and bcache1 (mounted) >>>> >>>> $ head -2 /proc/meminfo >>>> MemTotal: 32913872 kB >>>> MemFree: 12376640 kB >>>> >>>> >>>> - Free memory with kernel 3.12.9 with mem=16G and bcache0 (mounted) >>>> >>>> $ head -2 /proc/meminfo >>>> MemTotal: 15602144 kB >>>> MemFree: 14005372 kB > > > too many variables. Boot the same box with the SAME kernel, just twiddle how much ram is visible via the GRUB commandline. ... try with mem=16G and other values like 12G, 24G or 31G O.K. Here you are: With kernel 3.13.2: mem=2G ---> boots O.K. (/dev/bcache0). mem=4G ---> Out of memory. (initramfs appears with bcache0 and bcache1 for only one caching device. bcache1 has the two correct slaves). mem=8G ---> bcache-register killed. Kernel panic. mem=16G --> Out of memory (initramfs appears with bcache0 to bcache7 for only one caching device. bcache7 has the two correct slaves). mem=20G --> Out of memory (no initramfs prompt appearing). mem=24G --> Out of memory (initramfs appears with bcache0 to bcache9 for only one caching device. bcache9 has the two correct slaves). (the more RAM is given to box, the more messages about out of memory you get. Kernel 3.12.9 Command line: BOOT_IMAGE=/vmlinuz-3.12.9 root=/dev/bcache0 ro "acpi_osi=!Windows 2012" quiet mem=16G intel_pstate=disable pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 rcutree.rcu_idle_gp_delay=1 (changing mem kernel boot parameter): mem=12G ---> boots O.K. (/dev/bcache0). mem=14G ---> boots O.K. (/dev/bcache0). mem=16G ---> boots O.K. (/dev/bcache0). mem=17G ---> boots O.K. (/dev/bcache0). mem=18G ---> boots O.K. (/dev/bcache0). mem=20G ---> Kernel panic. mem=24G ---> Kernel panic. mem=32G ---> Out of memory. (initramfs appears with bcache0 and bcache1 for only one caching device. bcache1 has the two correct slaves). With kernel 3.12.9, When booting, with udev info in /var/log/messages, there are memory allocation failure for bcache-register messages: Feb 11 17:22:10 minijep kernel: [ 3.099025] bio: create slab <bio-1> at 1 Feb 11 17:22:10 minijep kernel: [ 3.452716] bcache: bch_journal_replay() journal replay done, 575 keys in 49 entries, seq 573572 Feb 11 17:22:10 minijep kernel: [ 3.452777] vmalloc: allocation failure: 19327352836 bytes Feb 11 17:22:10 minijep kernel: [ 3.452780] bcache-register: page allocation failure: order:0, mode:0x80d2 Feb 11 17:22:10 minijep kernel: [ 3.452783] CPU: 0 PID: 298 Comm: bcache-register Not tainted 3.12.9 #1 Feb 11 17:22:10 minijep kernel: [ 3.452784] Hardware name: Micro-Star International Co., Ltd. GT60/MS-16F3, BIOS E16F3IMS.10U 01/21/2013 Feb 11 17:22:10 minijep kernel: [ 3.452786] 0000f72000000083 ffffffff8137e021 0000000000000001 ffffffff810c0864 Feb 11 17:22:10 minijep kernel: [ 3.452789] ffffffff814fdf94 ffff880036f65b70 0000000000000018 ffff880036f65be8 Feb 11 17:22:10 minijep kernel: [ 3.452792] ffff880036f65b88 ffff880036fc8b20 0000000000000000 0000000000000003 Feb 11 17:22:10 minijep kernel: [ 3.452795] Call Trace: Feb 11 17:22:10 minijep kernel: [ 3.452804] [<ffffffff8137e021>] ? dump_stack+0x41/0x51 Feb 11 17:22:10 minijep kernel: [ 3.452808] [<ffffffff810c0864>] ? warn_alloc_failed+0x118/0x12c Feb 11 17:22:10 minijep kernel: [ 3.452814] [<ffffffff810e7134>] ? __vmalloc_node_range+0x1cd/0x1de Feb 11 17:22:10 minijep kernel: [ 3.452817] [<ffffffff810e7171>] ? __vmalloc_node+0x2c/0x31 Feb 11 17:22:10 minijep kernel: [ 3.452827] [<ffffffffa01ebd1c>] ? bcache_device_init+0x81/0x241 [bcache] Feb 11 17:22:10 minijep kernel: [ 3.452832] [<ffffffff810e71ab>] ? vzalloc+0x21/0x22 Feb 11 17:22:10 minijep kernel: [ 3.452839] [<ffffffffa01ebd1c>] ? bcache_device_init+0x81/0x241 [bcache] Feb 11 17:22:10 minijep kernel: [ 3.452845] [<ffffffffa01ec05e>] ? flash_dev_run+0x7d/0x12b [bcache] Feb 11 17:22:10 minijep kernel: [ 3.452854] [<ffffffffa01ed88b>] ? run_cache_set+0x5c4/0x695 [bcache] Feb 11 17:22:10 minijep kernel: [ 3.452859] [<ffffffffa01eee47>] ? register_bcache+0x10a0/0x12d9 [bcache] Feb 11 17:22:10 minijep kernel: [ 3.452863] [<ffffffff810f0f15>] ? alloc_pages_current+0xef/0x109 Feb 11 17:22:10 minijep kernel: [ 3.452867] [<ffffffff81159855>] ? sysfs_write_file+0xcf/0x103 Feb 11 17:22:10 minijep kernel: [ 3.452871] [<ffffffff81106a23>] ? vfs_write+0xa8/0x10b Feb 11 17:22:10 minijep kernel: [ 3.452874] [<ffffffff8110705e>] ? SyS_write+0x41/0x74 Feb 11 17:22:10 minijep kernel: [ 3.452878] [<ffffffff81386ca2>] ? system_call_fastpath+0x16/0x1b Feb 11 17:22:10 minijep kernel: [ 3.452880] Mem-Info: Feb 11 17:22:10 minijep kernel: [ 3.452881] Node 0 DMA per-cpu: Feb 11 17:22:10 minijep kernel: [ 3.452883] CPU 0: hi: 0, btch: 1 usd: 0 Feb 11 17:22:10 minijep kernel: [ 3.452884] CPU 1: hi: 0, btch: 1 usd: 0 Feb 11 17:22:10 minijep kernel: [ 3.452886] CPU 2: hi: 0, btch: 1 usd: 0 Feb 11 17:22:10 minijep kernel: [ 3.452887] CPU 3: hi: 0, btch: 1 usd: 0 Feb 11 17:22:10 minijep kernel: [ 3.452888] CPU 4: hi: 0, btch: 1 usd: 0 Feb 11 17:22:10 minijep kernel: [ 3.452889] CPU 5: hi: 0, btch: 1 usd: 0 Feb 11 17:22:10 minijep kernel: [ 3.452890] CPU 6: hi: 0, btch: 1 usd: 0 Feb 11 17:22:10 minijep kernel: [ 3.452892] CPU 7: hi: 0, btch: 1 usd: 0 -- -- Salutacions...Josep -- -- -- Salutacions...Josep -- ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: bcache and memory at boot. Bug? 2014-02-26 16:03 ` Fwd: " Josep Lladonosa @ 2014-02-26 16:38 ` Josep Lladonosa 0 siblings, 0 replies; 7+ messages in thread From: Josep Lladonosa @ 2014-02-26 16:38 UTC (permalink / raw) To: linux-bcache@vger.kernel.org Hi again, I have been "walking" around the code in order to debug. Now, with kernels 3.13.3, 3.13.2 and 3.12.9 I can boot /dev/bcache0 as the root system with all RAM available (32 GiB) with a small modification (one line) in super.c into flash_devs_run(). To recapitulate, my system has sda partitioned with fdisk; sdb is GPT partitioned. Cache device is /dev/sda. Backed device is another partition in /dev/sdb. I am using a proportionally big partition for the cache device (211551921 blocks) and perhaps some code would have failed with these numbers. What have I found? Cache device has 4096 nr_uuids and some of them have an incorrect value of "sectors". Incorrect values all of them have a value higher than 0x9000000000000000, so I applied a "filter" in order not to run the uuids (that avoids the try to allocate such huge quantity of RAM). Some sample lines from /var/log/messages: ---------------------------------------- (...) Feb 26 14:10:08 minijep kernel: [ 3.589559] bcache: flash_devs_run() P00: flash_dev_run: uuids[875] u: ffff88080129b580, u->sectors: 9000000002800000 Feb 26 14:10:08 minijep kernel: [ 3.589561] bcache: flash_devs_run() P00: flash_dev_run: uuids[876] u: ffff88080129b600, u->sectors: 16112800 Feb 26 14:10:08 minijep kernel: [ 3.589562] bcache: flash_devs_run() P00: flash_dev_run: uuids[877] u: ffff88080129b680, u->sectors: 41ab21000 Feb 26 14:10:08 minijep kernel: [ 3.589563] bcache: flash_devs_run() P00: flash_dev_run: uuids[878] u: ffff88080129b700, u->sectors: 9000000000800000 Feb 26 14:10:08 minijep kernel: [ 3.589565] bcache: flash_devs_run() P00: flash_dev_run: uuids[879] u: ffff88080129b780, u->sectors: 16112a40 Feb 26 14:10:08 minijep kernel: [ 3.589566] bcache: flash_devs_run() P00: flash_dev_run: uuids[880] u: ffff88080129b800, u->sectors: 41f8dd800 Feb 26 14:10:08 minijep kernel: [ 3.589567] bcache: flash_devs_run() P00: flash_dev_run: uuids[881] u: ffff88080129b880, u->sectors: 9000000002000000 Feb 26 14:10:08 minijep kernel: [ 3.589569] bcache: flash_devs_run() P00: flash_dev_run: uuids[882] u: ffff88080129b900, u->sectors: 16112c58 Feb 26 14:10:08 minijep kernel: [ 3.589570] bcache: flash_devs_run() P00: flash_dev_run: uuids[883] u: ffff88080129b980, u->sectors: 42ab53800 Feb 26 14:10:08 minijep kernel: [ 3.589572] bcache: flash_devs_run() P00: flash_dev_run: uuids[884] u: ffff88080129ba00, u->sectors: 9000000000800000 Feb 26 14:10:08 minijep kernel: [ 3.589573] bcache: flash_devs_run() P00: flash_dev_run: uuids[885] u: ffff88080129ba80, u->sectors: 16112eb8 Feb 26 14:10:08 minijep kernel: [ 3.589574] bcache: flash_devs_run() P00: flash_dev_run: uuids[886] u: ffff88080129bb00, u->sectors: 431732000 Feb 26 14:10:08 minijep kernel: [ 3.589576] bcache: flash_devs_run() P00: flash_dev_run: uuids[887] u: ffff88080129bb80, u->sectors: 9000000000800000 Feb 26 14:10:08 minijep kernel: [ 3.589577] bcache: flash_devs_run() P00: flash_dev_run: uuids[888] u: ffff88080129bc00, u->sectors: 16118250 Feb 26 14:10:08 minijep kernel: [ 3.589578] bcache: flash_devs_run() P00: flash_dev_run: uuids[889] u: ffff88080129bc80, u->sectors: c014a000 Feb 26 14:10:08 minijep kernel: [ 3.589580] bcache: flash_devs_run() P00: flash_dev_run: uuids[890] u: ffff88080129bd00, u->sectors: 9000000000800000 Feb 26 14:10:08 minijep kernel: [ 3.589581] bcache: flash_devs_run() P00: flash_dev_run: uuids[891] u: ffff88080129bd80, u->sectors: 24bb8960 Feb 26 14:10:08 minijep kernel: [ 3.589582] bcache: flash_devs_run() P00: flash_dev_run: uuids[892] u: ffff88080129be00, u->sectors: 162c74800 Feb 26 14:10:08 minijep kernel: [ 3.589584] bcache: flash_devs_run() P00: flash_dev_run: uuids[893] u: ffff88080129be80, u->sectors: 9000000001800000 Feb 26 14:10:08 minijep kernel: [ 3.589585] bcache: flash_devs_run() P00: flash_dev_run: uuids[894] u: ffff88080129bf00, u->sectors: 24bb8a00 Feb 26 14:10:08 minijep kernel: [ 3.589586] bcache: flash_devs_run() P00: flash_dev_run: uuids[895] u: ffff88080129bf80, u->sectors: 162c8e000 (...) Feb 26 14:10:08 minijep kernel: [ 3.593789] bcache: flash_devs_run() P00: flash_dev_run: uuids[4093] u: ffff8808012ffe80, u->sectors: 0 Feb 26 14:10:08 minijep kernel: [ 3.593791] bcache: flash_devs_run() P00: flash_dev_run: uuids[4094] u: ffff8808012fff00, u->sectors: 0 Feb 26 14:10:08 minijep kernel: [ 3.593792] bcache: flash_devs_run() P00: flash_dev_run: uuids[4095] u: ffff8808012fff80, u->sectors: 0 Feb 26 14:10:08 minijep kernel: [ 3.593794] bcache: register_cache() registered cache device sda1 (...) Feb 26 14:10:08 minijep kernel: [ 5.781599] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off Feb 26 14:10:08 minijep kernel: [ 35.627315] Adding 32225276k swap on /dev/sdb6. Priority:-1 extents:1 across:32225276k (...) ----------------------------------------- The change to super.c (pr_info() call is for logging and next if is my salvation ;-): static int flash_devs_run(struct cache_set *c) { int ret = 0; struct uuid_entry *u; _debug_show_uuids_of_cache_set(9999,c); for (u = c->uuids; u < c->uuids + c->nr_uuids && !ret; u++) { pr_info("P00: flash_dev_run: uuids[%d] u: %p, u->sectors: %llx", u-c->uuids, u, u->sectors); if (u->sectors < 0x9000000000000000) if (UUID_FLASH_ONLY(u)) ret = flash_dev_run(c, u); } return ret; } In order to log that large number of lines I boot with kernel parameter: log_buf_len=10M I would like to add that booting the system spends (I think that waiting for something) some time to boot, but it could be another thing (look at last lines of previous /var/log/messages). As you have seen this is a "trick" to bypass something wich is going wrong. My question is: - where is "sectors" field of each uuids struct filled? Is the value read from the cache device? I guess that something could happen (or have happened) in some conversion (int/long instead of unsigned long) or in addressing to memory and a pointer which modified something which it should not. I would like to know what happens in order to avoid the use of the filtering line for big numbers in sectors field as I guess that something else should be verified... Josep On 26 February 2014 17:03, Josep Lladonosa <jlladono@gmail.com> wrote: > Hello, > > I forward some information wich was missing in the list. After this I > write another message with some (good news for me and) information > about things that I have found. > > Josep > > ---------- Forwarded message ---------- > From: Josep Lladonosa <jlladono@gmail.com> > Date: 11 February 2014 17:39 > Subject: Re: bcache and memory at boot. Bug? > To: matthew patton <pattonme@yahoo.com> > > > On 11 February 2014 12:23, matthew patton <pattonme@yahoo.com> wrote: >> >> >> >>> -Free memory with kernel 3.11.0-rc7 with 32GiB and bcache0 (halved?) >>>>> and bcache1 (mounted) >>>>> >>>>> $ head -2 /proc/meminfo >>>>> MemTotal: 32913872 kB >>>>> MemFree: 12376640 kB >>>>> >>>>> >>>>> - Free memory with kernel 3.12.9 with mem=16G and bcache0 (mounted) >>>>> >>>>> $ head -2 /proc/meminfo >>>>> MemTotal: 15602144 kB >>>>> MemFree: 14005372 kB >> >> >> too many variables. Boot the same box with the SAME kernel, just twiddle how much ram is visible via the GRUB commandline. ... try with mem=16G and other values like 12G, 24G or 31G > > O.K. Here you are: > > With kernel 3.13.2: > > mem=2G ---> boots O.K. (/dev/bcache0). > mem=4G ---> Out of memory. (initramfs appears with bcache0 and > bcache1 for only one caching device. bcache1 has the two correct > slaves). > mem=8G ---> bcache-register killed. Kernel panic. > mem=16G --> Out of memory (initramfs appears with bcache0 to bcache7 > for only one caching device. bcache7 has the two correct slaves). > mem=20G --> Out of memory (no initramfs prompt appearing). > mem=24G --> Out of memory (initramfs appears with bcache0 to bcache9 > for only one caching device. bcache9 has the two correct slaves). > > (the more RAM is given to box, the more messages about out of memory you get. > > Kernel 3.12.9 > > Command line: BOOT_IMAGE=/vmlinuz-3.12.9 root=/dev/bcache0 ro > "acpi_osi=!Windows 2012" quiet mem=16G intel_pstate=disable > pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 > i915.lvds_downclock=1 rcutree.rcu_idle_gp_delay=1 > > (changing mem kernel boot parameter): > > mem=12G ---> boots O.K. (/dev/bcache0). > mem=14G ---> boots O.K. (/dev/bcache0). > mem=16G ---> boots O.K. (/dev/bcache0). > mem=17G ---> boots O.K. (/dev/bcache0). > mem=18G ---> boots O.K. (/dev/bcache0). > mem=20G ---> Kernel panic. > mem=24G ---> Kernel panic. > mem=32G ---> Out of memory. (initramfs appears with bcache0 and > bcache1 for only one caching device. bcache1 has the two correct > slaves). > > > With kernel 3.12.9, When booting, with udev info in /var/log/messages, > there are memory allocation failure for bcache-register messages: > > > Feb 11 17:22:10 minijep kernel: [ 3.099025] bio: create slab <bio-1> at 1 > Feb 11 17:22:10 minijep kernel: [ 3.452716] bcache: > bch_journal_replay() journal replay done, 575 keys in 49 entries, seq > 573572 > Feb 11 17:22:10 minijep kernel: [ 3.452777] vmalloc: allocation > failure: 19327352836 bytes > Feb 11 17:22:10 minijep kernel: [ 3.452780] bcache-register: page > allocation failure: order:0, mode:0x80d2 > Feb 11 17:22:10 minijep kernel: [ 3.452783] CPU: 0 PID: 298 Comm: > bcache-register Not tainted 3.12.9 #1 > Feb 11 17:22:10 minijep kernel: [ 3.452784] Hardware name: > Micro-Star International Co., Ltd. GT60/MS-16F3, BIOS E16F3IMS.10U > 01/21/2013 > Feb 11 17:22:10 minijep kernel: [ 3.452786] 0000f72000000083 > ffffffff8137e021 0000000000000001 ffffffff810c0864 > Feb 11 17:22:10 minijep kernel: [ 3.452789] ffffffff814fdf94 > ffff880036f65b70 0000000000000018 ffff880036f65be8 > Feb 11 17:22:10 minijep kernel: [ 3.452792] ffff880036f65b88 > ffff880036fc8b20 0000000000000000 0000000000000003 > Feb 11 17:22:10 minijep kernel: [ 3.452795] Call Trace: > Feb 11 17:22:10 minijep kernel: [ 3.452804] [<ffffffff8137e021>] ? > dump_stack+0x41/0x51 > Feb 11 17:22:10 minijep kernel: [ 3.452808] [<ffffffff810c0864>] ? > warn_alloc_failed+0x118/0x12c > Feb 11 17:22:10 minijep kernel: [ 3.452814] [<ffffffff810e7134>] ? > __vmalloc_node_range+0x1cd/0x1de > Feb 11 17:22:10 minijep kernel: [ 3.452817] [<ffffffff810e7171>] ? > __vmalloc_node+0x2c/0x31 > Feb 11 17:22:10 minijep kernel: [ 3.452827] [<ffffffffa01ebd1c>] ? > bcache_device_init+0x81/0x241 [bcache] > Feb 11 17:22:10 minijep kernel: [ 3.452832] [<ffffffff810e71ab>] ? > vzalloc+0x21/0x22 > Feb 11 17:22:10 minijep kernel: [ 3.452839] [<ffffffffa01ebd1c>] ? > bcache_device_init+0x81/0x241 [bcache] > Feb 11 17:22:10 minijep kernel: [ 3.452845] [<ffffffffa01ec05e>] ? > flash_dev_run+0x7d/0x12b [bcache] > Feb 11 17:22:10 minijep kernel: [ 3.452854] [<ffffffffa01ed88b>] ? > run_cache_set+0x5c4/0x695 [bcache] > Feb 11 17:22:10 minijep kernel: [ 3.452859] [<ffffffffa01eee47>] ? > register_bcache+0x10a0/0x12d9 [bcache] > Feb 11 17:22:10 minijep kernel: [ 3.452863] [<ffffffff810f0f15>] ? > alloc_pages_current+0xef/0x109 > Feb 11 17:22:10 minijep kernel: [ 3.452867] [<ffffffff81159855>] ? > sysfs_write_file+0xcf/0x103 > Feb 11 17:22:10 minijep kernel: [ 3.452871] [<ffffffff81106a23>] ? > vfs_write+0xa8/0x10b > Feb 11 17:22:10 minijep kernel: [ 3.452874] [<ffffffff8110705e>] ? > SyS_write+0x41/0x74 > Feb 11 17:22:10 minijep kernel: [ 3.452878] [<ffffffff81386ca2>] ? > system_call_fastpath+0x16/0x1b > Feb 11 17:22:10 minijep kernel: [ 3.452880] Mem-Info: > Feb 11 17:22:10 minijep kernel: [ 3.452881] Node 0 DMA per-cpu: > Feb 11 17:22:10 minijep kernel: [ 3.452883] CPU 0: hi: 0, > btch: 1 usd: 0 > Feb 11 17:22:10 minijep kernel: [ 3.452884] CPU 1: hi: 0, > btch: 1 usd: 0 > Feb 11 17:22:10 minijep kernel: [ 3.452886] CPU 2: hi: 0, > btch: 1 usd: 0 > Feb 11 17:22:10 minijep kernel: [ 3.452887] CPU 3: hi: 0, > btch: 1 usd: 0 > Feb 11 17:22:10 minijep kernel: [ 3.452888] CPU 4: hi: 0, > btch: 1 usd: 0 > Feb 11 17:22:10 minijep kernel: [ 3.452889] CPU 5: hi: 0, > btch: 1 usd: 0 > Feb 11 17:22:10 minijep kernel: [ 3.452890] CPU 6: hi: 0, > btch: 1 usd: 0 > Feb 11 17:22:10 minijep kernel: [ 3.452892] CPU 7: hi: 0, > btch: 1 usd: 0 > > > -- > -- > Salutacions...Josep > -- > > > -- > -- > Salutacions...Josep > -- -- -- Salutacions...Josep -- ^ permalink raw reply [flat|nested] 7+ messages in thread
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2014-02-08 8:53 ` Fwd: bcache and memory at boot. Bug? Josep Lladonosa
2014-02-10 11:40 ` Gabriel de Perthuis
2014-02-10 13:15 ` Josep Lladonosa
2014-02-10 22:46 ` Kent Overstreet
2014-02-11 10:56 ` Josep Lladonosa
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2014-02-26 16:03 ` Fwd: " Josep Lladonosa
2014-02-26 16:38 ` Josep Lladonosa
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