> Is it really the case that the bug only turns up when you run tests like
>
> while echo; do cat /sys/kernel/kexec_crash_loaded; done
> and
> while echo; do cat /sys/kernel/uevent_seqnum ; done;
>
> or will any fork-intensive workload also do it? Say,
>
> while echo ; do true ; done
>
This does not leak, but having a simple text file and reading it in a
loop causes it.
> ?
>
> Another interesting factoid here is that after the oomkilling you slabinfo has
>
> mm_struct 38 98 584 7 1 : tunables 32 16 8 : slabdata 14 14 0 : globalstat 2781 196 49 31 0 1 0 0 0 : cpustat 368800 11864 368920 11721
>
> so we aren't leaking mm_structs. In fact we aren't leaking anything from
> slab. But we are leaking pgds.
>
> iirc the most recent change we've made in the pgd_t area is the quicklist
> management which went into 2.6.22-rc1. You say the bug was present in
> 2.6.22. Can you test 2.6.21?
Nope, leak is not present in 2.6.21.7
--
regards,
Dhaval
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