On Fri, 29 Apr 2011 16:26:16 PDT, akpm@xxxxxxxxxxxxxxxxxxxx said: > The mm-of-the-moment snapshot 2011-04-29-16-25 has been uploaded to > > http://userweb.kernel.org/~akpm/mmotm/ Dell Latitude E6500 laptop, Core2 Due P8700, 4G RAM, 2G swap.Z86_64 kernel. I was running a backup of the system to an external USB hard drive. Source and target filesystems were ext4 on LVM on a LUKS encrypted partition. Same backup script to same destination drive worked fine a few days ago on a -rc1-mmotm0331 kernel. System ran out of RAM, and went about 50M into the 2G of swap. Not sure why *that* happened, as previously the backup script didn't cause any swapping. After that, the VmRSS and VmHWM values were corrupted for some 20 processes, including systemd, the X server, pidgin, firefox, rsyslogd Nothing notable in dmesg output, Nothing noted by abrtd, no processes crashed or misbehaving that I can tell. Just wonky numbers. top says: Tasks: 186 total, 3 running, 183 sleeping, 0 stopped, 0 zombie Cpu(s): 9.1%us, 9.1%sy, 0.0%ni, 74.8%id, 6.7%wa, 0.0%hi, 0.2%si, 0.0%st Mem: 4028664k total, 3839128k used, 189536k free, 1728880k buffers Swap: 2097148k total, 52492k used, 2044656k free, 1081528k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 47720 root 20 0 0 0 0 R 17.6 0.0 0:21.64 kworker/0:0 47453 root 20 0 0 0 0 D 13.7 0.0 0:36.10 kworker/1:3 26854 root 20 0 0 0 0 R 3.9 0.0 1:02.24 usb-storage 46917 root 20 0 18192 ? 208 D 3.9 457887369396224.0 4:18.50 dump 46918 root 20 0 18192 ? 208 S 3.9 457887369396224.0 4:18.38 dump 46919 root 20 0 18192 ? 208 D 3.9 457887369396224.0 4:18.48 dump 3 root 20 0 0 0 0 S 2.0 0.0 0:29.20 ksoftirqd/0 13 root 20 0 0 0 0 S 2.0 0.0 0:29.13 ksoftirqd/1 5467 root 20 0 12848 448 168 S 2.0 0.0 30:59.25 eTSrv 5655 root 20 0 178m ? ? S 2.0 457887369396224.0 89:18.03 Xorg 6079 valdis 20 0 347m 3936 5440 S 2.0 0.1 31:17.23 gkrellm 6479 valdis 20 0 1251m ? ? S 2.0 457887369396224.0 46:33.43 firef 46916 root 20 0 22296 2708 328 S 2.0 0.1 0:39.38 dump 48406 root 20 0 0 0 0 S 2.0 0.0 0:00.06 kworker/1:1 1 root 20 0 72228 ? 924 S 0.0 457887369396224.0 0:06.69 syste grep ^Vm /proc/5655/status (the X server) VmPeak: 215788 kB VmSize: 182440 kB VmLck: 0 kB VmHWM: 18446744073709544032 kB VmRSS: 18446744073408330104 kB VmData: 67688 kB VmStk: 288 kB VmExe: 1824 kB VmLib: 37800 kB VmPTE: 308 kB VmSwap: 0 kB Probably noteworth - the HWM in hex is FFFFFFFFFFFFE260, and similarly for VmRSS. Looks like an underflow someplace? It ended up hitting a bunch of processes: grep 184467 /proc/*/status /proc/1/status:VmHWM: 18446744073709551612 kB /proc/1/status:VmRSS: 18446744073709550072 kB /proc/26902/status:VmHWM: 18446744073709548820 kB /proc/26902/status:VmRSS: 18446744073709547948 kB /proc/27079/status:VmHWM: 18446744073709546764 kB /proc/27079/status:VmRSS: 18446744073709382820 kB /proc/28359/status:VmHWM: 18446744073709550700 kB /proc/28359/status:VmRSS: 18446744073709510496 kB /proc/42136/status:VmHWM: 18446744073709550528 kB /proc/42136/status:VmRSS: 18446744073709549656 kB /proc/46917/status:VmHWM: 18446744073709551568 kB /proc/46917/status:VmRSS: 18446744073640042856 kB /proc/46918/status:VmHWM: 18446744073709551568 kB /proc/46918/status:VmRSS: 18446744073640042056 kB /proc/46919/status:VmHWM: 18446744073709551568 kB /proc/46919/status:VmRSS: 18446744073640037512 kB /proc/4742/status:VmHWM: 18446744073709550144 kB /proc/4742/status:VmRSS: 18446744073709549520 kB /proc/4821/status:VmHWM: 18446744073709519576 kB /proc/4821/status:VmRSS: 18446744073709519428 kB /proc/5412/status:VmHWM: 18446744073709547064 kB /proc/5412/status:VmRSS: 18446744073709546976 kB /proc/5641/status:VmHWM: 18446744073709027168 kB /proc/5641/status:VmRSS: 18446744073708532364 kB /proc/5655/status:VmHWM: 18446744073709544032 kB /proc/5655/status:VmRSS: 18446744073407790088 kB /proc/5856/status:VmHWM: 18446744073709550760 kB /proc/5856/status:VmRSS: 18446744073708844568 kB /proc/5997/status:VmHWM: 18446744073709308884 kB /proc/5997/status:VmRSS: 18446744073411781076 kB /proc/6306/status:VmHWM: 18446744073709546960 kB /proc/6306/status:VmRSS: 18446744073709425144 kB /proc/6416/status:VmHWM: 18446744073709532884 kB /proc/6416/status:VmRSS: 18446744073706032272 kB /proc/6446/status:VmHWM: 18446744073709534900 kB /proc/6446/status:VmRSS: 18446744073709527604 kB /proc/6479/status:VmHWM: 18446744073709547196 kB /proc/6479/status:VmRSS: 18446744073654889656 kB /proc/6555/status:VmHWM: 18446744073709551612 kB /proc/6555/status:VmRSS: 18446744073709526840 kB /proc/6647/status:VmHWM: 18446744073709549680 kB /proc/6647/status:VmRSS: 18446744073685279348 kB Any ideas? The backup has finished, but the corrupted values are hanging around. Not sure if it's repeatable.
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