On 06/02/2019 17:16, Marc Gonzalez wrote: > # dd if=/dev/sde of=/dev/null bs=1M & while true; do echo l > /proc/sysrq-trigger; sleep 1; done > https://pastebin.ubuntu.com/p/Sx4hXRbHby/ > > What other information can I provide to help debug this issue? # dd if=/dev/sde of=/dev/null bs=1M & while true; do echo m > /proc/sysrq-trigger; echo; sleep 1; done https://pastebin.ubuntu.com/p/tXTCK3Jypn/ Here are the first and last Mem-Info reports: (Identical fields removed) active_anon:1449 inactive_anon:3417 isolated_anon:0 active_file:0 inactive_file:0 isolated_file:0 slab_reclaimable:1309 slab_unreclaimable:2174 mapped:465 shmem:4797 pagetables:14 bounce:0 free:979014 free_pcp:2068 free_cma:0 Node 0 active_anon:5960kB inactive_anon:13668kB active_file:0kB inactive_file:656kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:2188kB dirty:0kB writeback:0kB shmem:19188kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no DMA32 free:1972788kB min:3956kB low:5924kB high:7892kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:2045952kB managed:1974524kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1480kB local_pcp:1480kB free_cma:0kB Normal free:1936864kB min:3992kB low:5976kB high:7960kB active_anon:6956kB inactive_anon:13668kB active_file:0kB inactive_file:5584kB unevictable:0kB writepending:0kB present:2068224kB managed:1986952kB mlocked:0kB kernel_stack:1456kB pagetables:76kB bounce:0kB free_pcp:6408kB local_pcp:612kB free_cma:0kB DMA32: 1*4kB (M) 4*8kB (M) 3*16kB (M) 3*32kB (M) 4*64kB (M) 3*128kB (M) 5*256kB (UM) 5*512kB (UM) 6*1024kB (UM) 6*2048kB (UM) 476*4096kB (M) = 1972788kB Normal: 2*4kB (E) 4*8kB (ME) 1*16kB (E) 2*32kB (ME) 2*64kB (ME) 2*128kB (UM) 0*256kB 3*512kB (UME) 1*1024kB (E) 1*2048kB (M) 471*4096kB (M) = 1934328kB 6974 total pagecache pages active_anon:1762 inactive_anon:3403 isolated_anon:0 active_file:0 inactive_file:949699 isolated_file:0 slab_reclaimable:3465 slab_unreclaimable:2220 mapped:591 shmem:4798 pagetables:19 bounce:0 free:26601 free_pcp:2250 free_cma:0 Node 0 active_anon:7048kB inactive_anon:13612kB active_file:0kB inactive_file:3798796kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:2364kB dirty:0kB writeback:0kB shmem:19192kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no DMA32 free:100488kB min:3956kB low:5924kB high:7892kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:1866424kB unevictable:0kB writepending:0kB present:2045952kB managed:1974524kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:2844kB local_pcp:1172kB free_cma:0kB Normal free:5916kB min:3992kB low:5976kB high:7960kB active_anon:7048kB inactive_anon:13612kB active_file:0kB inactive_file:1932372kB unevictable:0kB writepending:0kB present:2068224kB managed:1986952kB mlocked:0kB kernel_stack:1472kB pagetables:76kB bounce:0kB free_pcp:6156kB local_pcp:516kB free_cma:0kB DMA32: 2*4kB (UM) 2*8kB (M) 1*16kB (U) 1*32kB (U) 5*64kB (M) 6*128kB (UME) 6*256kB (UME) 5*512kB (ME) 7*1024kB (UME) 7*2048kB (UME) 18*4096kB (M) = 100488kB Normal: 3*4kB (ME) 4*8kB (UE) 3*16kB (UME) 0*32kB 1*64kB (U) 1*128kB (M) 0*256kB 3*512kB (UME) 2*1024kB (UE) 1*2048kB (M) 0*4096kB = 5916kB 954552 total pagecache pages 'inactive_file' grows from 0 to 949699 'free' shrinks from 979014 to 26601 (probably 0 by the time the system hangs) 'total pagecache pages' grows from 6974 to 954552 Where are "pagecache pages" allocated? and freed? Regards.
