[patch] corrupt memstat_kvm_malloc(3) output and dtrace
ben at wanderview.com
Wed May 6 05:00:21 UTC 2009
On May 5, 2009, at 10:18 AM, Ben Kelly wrote:
> While debugging a problem recently with Alexander Leidinger we
> noticed that crashinfo(8) was producing corrupt vmstat -m output.
> After doing some digging it appears that memstat_kvm_malloc(3) might
> have been broken by this commit:
> The problem is that memstat_kvm_malloc(3) assumes that
> malloc_type_internal starts with an array of malloc_types_stats
> structures. This assumption is no longer true, though, as
> mti_probes was inserted at the start of the structure.
> It appears that this (untested) patch might fix the problem:
> I'm not very familiar with dtrace, though. Does anyone know if this
> would cause problems?
Just FYI, I was able to recompile and test this patch tonight. It
seems to have fixed vmstat -M $core -m output on my machine.
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