perform builds on a different drive

[Dmitry Morozovsky]

On Sat, 11 Sep 2010, Dominic Fandrey wrote:

DF> > FWIW, I tried tmpfs today on decent 8-STABLE/amd64, and twice put my tinderbox 
DF> > machine into
DF> > 
DF> > panic: tmpfs_alloc_vp: type 0xffffff000d957c40 0
DF> > 
DF> > (didn't dig into this deeply enough to get backtraces yet; to be done later)
DF> 
DF> This is really interesting. My /tmp is a tmpfs on every machine
DF> and I don't have such panics.
DF> 
DF> Did you run memtest? I used to have RAM problems and they only showed
DF> up in memtest, when I ran several instances at once.
DF> 
DF> I.e. 4 2gb instances on a machine with 8gb RAM.

Of course, I'm pretty sure my hardware is OK, since it survive both 12+ hours 
memtest86+ and 12-way buildworld (this machine is also builder for our usual 
archs, which are stable/releng-[678] for both i386 and amd64, plus various 
security branches and some local patched ones).

/tmp is on usual mdmfs, and I sometimes nullfs-mount subtrees of /b, which is 
tmpfs, under /usr/local/tb/<buildname>

For the reference, it's Supermicro with Core2Q-9450/8G/3ware/ZFS.  FreeBSD 
builds are scheduled (NO_CLEAN if exit code is zero, so usually it completes 
quickly) twice per day; the only panics I encounter last few months are tmpfs 
related.

Did you try stress you memory with both tmpfs and other kernel-related tasks?

-- 
Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck at FreeBSD.org ]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
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