On Wednesday 06 May 2009 1:00:09 am Ben Kelly wrote: > 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: > > > > http://svn.freebsd.org/viewvc/base?view=revision&revision=179222 > > > > 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: > > > > http://www.wanderview.com/svn/public/misc/zfs/vmstat_kvm_malloc.diff > > > > 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. I think that it would be better to update memstat_kvm_malloc(3) though. I'm also curious why libmemstat isn't just using malloc_types_internal directly. -- John BaldwinReceived on Tue May 12 2009 - 13:48:13 UTC
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