Dear Ben, > Although PAE supports up to 64 GB RAM ... The use of such a large > amount of high memory is problematic ... > Or you can test ... by restricting what the kernel uses with the > 'mem' parameter, e.g. mem=16G.
Trying various mem=XX values, no OOM was observed with mem=32G or less, but a crash is obtained with any memory over 32GB e.g. with mem=34G. This suggests a signed/unsigned bug more than an issue with highmem size; you said PAE supports 64GB, not just 32GB. > A 64-bit kernel doesn't have a split between normal and high memory. ... and it may have larger integers, less affected by signedness bugs. Cheers, Paul Paul Szabo p...@maths.usyd.edu.au http://www.maths.usyd.edu.au/u/psz/ School of Mathematics and Statistics University of Sydney Australia *** mem=34G - Tail end of /var/log/kern.log [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-686-pae mem=34G root=UUID=469c2730-1786-46f7-9d80-5d651ee581d7 ro quiet ... [ 388.560098] dd invoked oom-killer: gfp_mask=0x800d0, order=0, oom_adj=0, oom_score_adj=0 [ 388.560106] dd cpuset=/ mems_allowed=0 [ 388.560113] Pid: 4244, comm: dd Not tainted 3.2.0-4-686-pae #1 Debian 3.2.32-1 [ 388.560117] Call Trace: [ 388.560135] [<c1097c1c>] ? dump_header.isra.6+0x5c/0x167 [ 388.560144] [<c1120ff8>] ? security_real_capable_noaudit+0x2c/0x35 [ 388.560149] [<c1097e93>] ? oom_kill_process+0x30/0x201 [ 388.560155] [<c109810f>] ? select_bad_process.constprop.12+0xab/0xff [ 388.560160] [<c10983e0>] ? out_of_memory+0xf8/0x135 [ 388.560167] [<c109aecd>] ? __alloc_pages_nodemask+0x509/0x63e [ 388.560176] [<c10c0ca3>] ? ____cache_alloc+0x253/0x407 [ 388.560183] [<c10c1425>] ? kmem_cache_alloc+0x29/0x89 [ 388.560193] [<c11605ee>] ? radix_tree_preload+0x24/0x61 [ 388.560203] [<c10961cd>] ? add_to_page_cache_locked+0x3e/0xb3 [ 388.560210] [<c1096253>] ? add_to_page_cache_lru+0x11/0x2f [ 388.560217] [<c10962cb>] ? grab_cache_page_write_begin+0x5a/0x94 [ 388.560244] [<f88bb348>] ? ext3_write_begin+0xa0/0x1d2 [ext3] [ 388.560251] [<c109d562>] ? put_page+0x16/0x24 [ 388.560258] [<c1095e61>] ? generic_file_buffered_write+0xd8/0x1dd [ 388.560265] [<c1096afb>] ? __generic_file_aio_write+0x25e/0x282 [ 388.560273] [<c100f2fb>] ? read_tsc+0xa/0x28 [ 388.560282] [<c1053548>] ? timekeeping_get_ns+0x11/0x55 [ 388.560287] [<c1096b7c>] ? generic_file_aio_write+0x5d/0xb3 [ 388.560298] [<c10cbc31>] ? wait_on_retry_sync_kiocb+0x3c/0x3c [ 388.560304] [<c10cbcd9>] ? do_sync_write+0xa8/0xdc [ 388.560311] [<c10cc1f3>] ? rw_verify_area+0xc6/0xe7 [ 388.560317] [<c10cc493>] ? vfs_write+0x83/0xd4 [ 388.560323] [<c10cc653>] ? sys_write+0x3d/0x61 [ 388.560331] [<c12c5d1f>] ? sysenter_do_call+0x12/0x28 [ 388.560334] Mem-Info: [ 388.560337] DMA per-cpu: [ 388.560341] CPU 0: hi: 0, btch: 1 usd: 0 [ 388.560345] CPU 1: hi: 0, btch: 1 usd: 0 [ 388.560348] CPU 2: hi: 0, btch: 1 usd: 0 [ 388.560351] CPU 3: hi: 0, btch: 1 usd: 0 [ 388.560355] CPU 4: hi: 0, btch: 1 usd: 0 [ 388.560358] CPU 5: hi: 0, btch: 1 usd: 0 [ 388.560361] CPU 6: hi: 0, btch: 1 usd: 0 [ 388.560365] CPU 7: hi: 0, btch: 1 usd: 0 [ 388.560368] CPU 8: hi: 0, btch: 1 usd: 0 [ 388.560371] CPU 9: hi: 0, btch: 1 usd: 0 [ 388.560374] CPU 10: hi: 0, btch: 1 usd: 0 [ 388.560378] CPU 11: hi: 0, btch: 1 usd: 0 [ 388.560381] CPU 12: hi: 0, btch: 1 usd: 0 [ 388.560384] CPU 13: hi: 0, btch: 1 usd: 0 [ 388.560387] CPU 14: hi: 0, btch: 1 usd: 0 [ 388.560390] CPU 15: hi: 0, btch: 1 usd: 0 [ 388.560394] CPU 16: hi: 0, btch: 1 usd: 0 [ 388.560397] CPU 17: hi: 0, btch: 1 usd: 0 [ 388.560400] CPU 18: hi: 0, btch: 1 usd: 0 [ 388.560404] CPU 19: hi: 0, btch: 1 usd: 0 [ 388.560407] CPU 20: hi: 0, btch: 1 usd: 0 [ 388.560410] CPU 21: hi: 0, btch: 1 usd: 0 [ 388.560413] CPU 22: hi: 0, btch: 1 usd: 0 [ 388.560417] CPU 23: hi: 0, btch: 1 usd: 0 [ 388.560420] CPU 24: hi: 0, btch: 1 usd: 0 [ 388.560423] CPU 25: hi: 0, btch: 1 usd: 0 [ 388.560427] CPU 26: hi: 0, btch: 1 usd: 0 [ 388.560430] CPU 27: hi: 0, btch: 1 usd: 0 [ 388.560433] CPU 28: hi: 0, btch: 1 usd: 0 [ 388.560436] CPU 29: hi: 0, btch: 1 usd: 0 [ 388.560440] CPU 30: hi: 0, btch: 1 usd: 0 [ 388.560443] CPU 31: hi: 0, btch: 1 usd: 0 [ 388.560446] Normal per-cpu: [ 388.560449] CPU 0: hi: 186, btch: 31 usd: 174 [ 388.560452] CPU 1: hi: 186, btch: 31 usd: 164 [ 388.560456] CPU 2: hi: 186, btch: 31 usd: 53 [ 388.560459] CPU 3: hi: 186, btch: 31 usd: 51 [ 388.560462] CPU 4: hi: 186, btch: 31 usd: 155 [ 388.560465] CPU 5: hi: 186, btch: 31 usd: 72 [ 388.560469] CPU 6: hi: 186, btch: 31 usd: 143 [ 388.560472] CPU 7: hi: 186, btch: 31 usd: 95 [ 388.560475] CPU 8: hi: 186, btch: 31 usd: 178 [ 388.560478] CPU 9: hi: 186, btch: 31 usd: 171 [ 388.560481] CPU 10: hi: 186, btch: 31 usd: 26 [ 388.560485] CPU 11: hi: 186, btch: 31 usd: 49 [ 388.560488] CPU 12: hi: 186, btch: 31 usd: 36 [ 388.560491] CPU 13: hi: 186, btch: 31 usd: 38 [ 388.560494] CPU 14: hi: 186, btch: 31 usd: 37 [ 388.560497] CPU 15: hi: 186, btch: 31 usd: 49 [ 388.560500] CPU 16: hi: 186, btch: 31 usd: 174 [ 388.560503] CPU 17: hi: 186, btch: 31 usd: 162 [ 388.560507] CPU 18: hi: 186, btch: 31 usd: 175 [ 388.560510] CPU 19: hi: 186, btch: 31 usd: 161 [ 388.560513] CPU 20: hi: 186, btch: 31 usd: 162 [ 388.560516] CPU 21: hi: 186, btch: 31 usd: 172 [ 388.560519] CPU 22: hi: 186, btch: 31 usd: 139 [ 388.560522] CPU 23: hi: 186, btch: 31 usd: 155 [ 388.560525] CPU 24: hi: 186, btch: 31 usd: 131 [ 388.560529] CPU 25: hi: 186, btch: 31 usd: 154 [ 388.560532] CPU 26: hi: 186, btch: 31 usd: 175 [ 388.560535] CPU 27: hi: 186, btch: 31 usd: 173 [ 388.560538] CPU 28: hi: 186, btch: 31 usd: 178 [ 388.560541] CPU 29: hi: 186, btch: 31 usd: 138 [ 388.560544] CPU 30: hi: 186, btch: 31 usd: 125 [ 388.560547] CPU 31: hi: 186, btch: 31 usd: 168 [ 388.560550] HighMem per-cpu: [ 388.560553] CPU 0: hi: 186, btch: 31 usd: 117 [ 388.560556] CPU 1: hi: 186, btch: 31 usd: 115 [ 388.560559] CPU 2: hi: 186, btch: 31 usd: 34 [ 388.560562] CPU 3: hi: 186, btch: 31 usd: 46 [ 388.560566] CPU 4: hi: 186, btch: 31 usd: 53 [ 388.560569] CPU 5: hi: 186, btch: 31 usd: 150 [ 388.560572] CPU 6: hi: 186, btch: 31 usd: 72 [ 388.560575] CPU 7: hi: 186, btch: 31 usd: 18 [ 388.560578] CPU 8: hi: 186, btch: 31 usd: 34 [ 388.560582] CPU 9: hi: 186, btch: 31 usd: 16 [ 388.560585] CPU 10: hi: 186, btch: 31 usd: 24 [ 388.560588] CPU 11: hi: 186, btch: 31 usd: 62 [ 388.560591] CPU 12: hi: 186, btch: 31 usd: 5 [ 388.560594] CPU 13: hi: 186, btch: 31 usd: 24 [ 388.560598] CPU 14: hi: 186, btch: 31 usd: 4 [ 388.560601] CPU 15: hi: 186, btch: 31 usd: 37 [ 388.560604] CPU 16: hi: 186, btch: 31 usd: 172 [ 388.560607] CPU 17: hi: 186, btch: 31 usd: 157 [ 388.560611] CPU 18: hi: 186, btch: 31 usd: 138 [ 388.560614] CPU 19: hi: 186, btch: 31 usd: 153 [ 388.560617] CPU 20: hi: 186, btch: 31 usd: 158 [ 388.560620] CPU 21: hi: 186, btch: 31 usd: 130 [ 388.560623] CPU 22: hi: 186, btch: 31 usd: 157 [ 388.560626] CPU 23: hi: 186, btch: 31 usd: 151 [ 388.560629] CPU 24: hi: 186, btch: 31 usd: 175 [ 388.560632] CPU 25: hi: 186, btch: 31 usd: 131 [ 388.560635] CPU 26: hi: 186, btch: 31 usd: 185 [ 388.560639] CPU 27: hi: 186, btch: 31 usd: 160 [ 388.560642] CPU 28: hi: 186, btch: 31 usd: 143 [ 388.560645] CPU 29: hi: 186, btch: 31 usd: 182 [ 388.560648] CPU 30: hi: 186, btch: 31 usd: 166 [ 388.560651] CPU 31: hi: 186, btch: 31 usd: 145 [ 388.560660] active_anon:12141 inactive_anon:206 isolated_anon:0 [ 388.560662] active_file:2689 inactive_file:7638801 isolated_file:0 [ 388.560664] unevictable:0 dirty:532 writeback:927 unstable:0 [ 388.560665] free:507417 slab_reclaimable:126086 slab_unreclaimable:7435 [ 388.560667] mapped:7462 shmem:327 pagetables:500 bounce:0 [ 388.560681] DMA free:4256kB min:784kB low:980kB high:1176kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:36kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15784kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:11464kB slab_unreclaimable:124kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:318 all_unreclaimable? yes [ 388.560690] lowmem_reserve[]: 0 867 32452 32452 [ 388.560705] Normal free:43552kB min:44112kB low:55140kB high:66168kB active_anon:0kB inactive_anon:0kB active_file:704kB inactive_file:248kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:887976kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB shmem:0kB slab_reclaimable:492880kB slab_unreclaimable:29616kB kernel_stack:3072kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:2314 all_unreclaimable? yes [ 388.560714] lowmem_reserve[]: 0 0 252685 252685 [ 388.560728] HighMem free:1981860kB min:512kB low:402232kB high:803952kB active_anon:48564kB inactive_anon:824kB active_file:10052kB inactive_file:30554920kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:32343780kB mlocked:0kB dirty:2128kB writeback:3708kB mapped:29844kB shmem:1308kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:2000kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [ 388.560737] lowmem_reserve[]: 0 0 0 0 [ 388.560742] DMA: 344*4kB 24*8kB 2*16kB 1*32kB 3*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 1*2048kB 0*4096kB = 4256kB [ 388.560755] Normal: 499*4kB 410*8kB 206*16kB 141*32kB 76*64kB 41*128kB 22*256kB 7*512kB 1*1024kB 3*2048kB 1*4096kB = 43676kB [ 388.560768] HighMem: 27*4kB 108*8kB 180*16kB 69*32kB 10*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 2*2048kB 481*4096kB = 1981612kB [ 388.560781] 7641929 total pagecache pages [ 388.560784] 0 pages in swap cache [ 388.560787] Swap cache stats: add 0, delete 0, find 0/0 [ 388.560789] Free swap = 0kB [ 388.560791] Total swap = 0kB [ 388.689761] 8912880 pages RAM [ 388.689764] 8685058 pages HighMem [ 388.689765] 602863 pages reserved [ 388.689766] 7651933 pages shared [ 388.689766] 164670 pages non-shared [ 388.689768] [ pid ] uid tgid total_vm rss cpu oom_adj oom_score_adj name [ 388.689796] [ 664] 0 664 867 487 11 -17 -1000 udevd [ 388.689799] [ 976] 0 976 800 360 4 -17 -1000 udevd [ 388.689802] [ 977] 0 977 800 361 12 -17 -1000 udevd [ 388.689805] [ 2185] 0 2185 594 198 12 0 0 rpcbind [ 388.689808] [ 2216] 105 2216 662 315 10 0 0 rpc.statd [ 388.689811] [ 2234] 0 2234 644 98 17 0 0 rpc.idmapd [ 388.689813] [ 2561] 0 2561 7051 410 0 0 0 rsyslogd [ 388.689816] [ 2631] 0 2631 538 31 0 0 0 atd [ 388.689818] [ 2694] 0 2694 959 237 8 0 0 cron [ 388.689821] [ 2747] 0 2747 469 154 1 0 0 acpid [ 388.689823] [ 2781] 101 2781 854 367 3 0 0 dbus-daemon [ 388.689826] [ 3014] 0 3014 1121 348 8 0 0 bluetoothd [ 388.689829] [ 3029] 106 3029 789 366 2 0 0 avahi-daemon [ 388.689831] [ 3030] 106 3030 789 108 15 0 0 avahi-daemon [ 388.689834] [ 3066] 0 3066 1616 264 6 -17 -1000 sshd [ 388.689836] [ 3085] 0 3085 6803 1138 1 0 0 NetworkManager [ 388.689839] [ 3145] 0 3145 4504 693 6 0 0 gdm3 [ 388.689841] [ 3157] 0 3157 6101 1012 8 0 0 polkitd [ 388.689844] [ 3173] 0 3173 1722 688 7 0 0 modem-manager [ 388.689846] [ 3176] 104 3176 1855 230 1 0 0 exim4 [ 388.689849] [ 3215] 0 3215 1295 765 5 0 0 dhclient [ 388.689851] [ 3216] 0 3216 5110 1021 0 0 0 gdm-simple-slav [ 388.689854] [ 3234] 0 3234 31832 4078 1 0 0 Xorg [ 388.689856] [ 3237] 0 3237 462 76 1 0 0 minissdpd [ 388.689859] [ 3238] 0 3238 945 214 10 0 0 getty [ 388.689862] [ 3239] 0 3239 945 213 9 0 0 getty [ 388.689864] [ 3240] 0 3240 945 213 25 0 0 getty [ 388.689866] [ 3241] 0 3241 945 213 2 0 0 getty [ 388.689869] [ 3242] 0 3242 945 213 8 0 0 getty [ 388.689871] [ 3243] 0 3243 945 215 11 0 0 getty [ 388.689873] [ 3306] 112 3306 849 278 7 0 0 dbus-daemon [ 388.689876] [ 3307] 0 3307 6940 988 1 0 0 gdm-session-wor [ 388.689878] [ 3310] 0 3310 5844 756 8 0 0 accounts-daemon [ 388.689881] [ 3314] 0 3314 7258 851 20 0 0 console-kit-dae [ 388.689883] [ 3388] 112 3388 12814 2247 0 0 0 gnome-session [ 388.689886] [ 3392] 112 3392 55404 3225 0 0 0 gnome-settings- [ 388.689888] [ 3399] 0 3399 6836 945 2 0 0 upowerd [ 388.689891] [ 3437] 112 3437 2093 511 1 0 0 gvfsd [ 388.689893] [ 3485] 112 3485 10529 766 1 0 0 at-spi-bus-laun [ 388.689896] [ 3489] 112 3489 755 358 11 0 0 dbus-daemon [ 388.689898] [ 3493] 112 3493 4219 772 6 0 0 at-spi2-registr [ 388.689901] [ 3508] 112 3508 21879 920 4 0 0 pulseaudio [ 388.689903] [ 3512] 110 3512 5001 303 4 0 0 rtkit-daemon [ 388.689906] [ 3749] 112 3749 32934 2110 2 0 0 metacity [ 388.689908] [ 3780] 112 3780 8191 2083 12 0 0 polkit-gnome-au [ 388.689911] [ 3781] 112 3781 34326 3480 2 0 0 gdm-simple-gree [ 388.689913] [ 3792] 0 3792 4735 758 7 0 0 gdm-session-wor [ 388.689916] [ 3794] 0 3794 2475 847 0 0 0 sshd [ 388.689918] [ 3799] 1000 3799 2475 522 0 0 0 sshd [ 388.689921] [ 3800] 1000 3800 1398 696 10 0 0 bash [ 388.689923] [ 3886] 0 3886 2475 846 1 0 0 sshd [ 388.689925] [ 3891] 1000 3891 2475 523 0 0 0 sshd [ 388.689928] [ 3892] 1000 3892 1398 696 3 0 0 bash [ 388.689930] [ 3976] 1000 3976 1398 409 9 0 0 bash [ 388.689932] [ 4010] 1000 4010 849 127 17 0 0 tail [ 388.689935] [ 4244] 1000 4244 1142 404 12 0 0 dd [ 388.689937] Out of memory: Kill process 2185 (rpcbind) score 1 or sacrifice child [ 388.689941] Killed process 2185 (rpcbind) total-vm:2376kB, anon-rss:212kB, file-rss:580kB -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". 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