Messages in this thread | | | Date | Thu, 26 Feb 2004 04:53:31 -0800 | From | Andrew Morton <> | Subject | Re: 2.6.1 IO lockup on SMP systems |
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"Sergey S. Kostyliov" <rathamahata@php4.ru> wrote: > > Yet another lockup has just occurred. I could be wrong but from the > /proc/meminfo content it doesn't looks like memory leak (neither kernel > nor userspace), doesn't it?
I think it's a kernel leak.
> Thu Feb 26 05:00:15 MSK 2004 > MemTotal: 2073868 kB > MemFree: 2528 kB > Buffers: 2180 kB > Cached: 34216 kB > SwapCached: 643808 kB > Active: 999316 kB > Inactive: 12088 kB > HighTotal: 1179648 kB > HighFree: 576 kB > LowTotal: 894220 kB > LowFree: 1952 kB > SwapTotal: 3583968 kB > SwapFree: 2559796 kB > Dirty: 0 kB > Writeback: 3052 kB > Mapped: 1001208 kB > Slab: 23932 kB > Committed_AS: 1979784 kB > PageTables: 4840 kB > VmallocTotal: 114680 kB > VmallocUsed: 7448 kB > VmallocChunk: 107232 kB
A gig of mapped memory, most of it in swapcache. That's probably all highmem. Only a gig of memory on the page LRU. Where is the rest? Lost.
Almost no pagecache at all, slab is small.
> 3) sysrq-T: > =========== > http://sysadminday.org.ru/2.6.3-lockup/20040226/sysrq-T
hm, you have 34 instances of crond running. How odd.
> 3) `vmstat 30': > =============== > procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- > r b swpd free buff cache si so bi bo in cs us sy id wa > 0 19 1255096 1952 1996 19920 426 1763 505 1778 1068 172 0 1 0 99 > 0 24 1260156 1944 2028 19816 374 1650 463 1670 1067 165 0 1 0 99
Again, all your memory has vanished.
I'd say that we've leaked everything in lowmem and everyone is stuck trying to reclaim some lowmem memory. Not sure why the oom-killer didn't do anything. I haven't tested it in a year - maybe it broke.
So. What are you using which is different from everyone else? DAC960 I see. What about firewall setups, NIC drivers, RAID/MD/etc? Anything in there which isn't a mainstream thing?
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