Date: Thu, 8 Mar 2001 17:55:41 +0100 From: "Andy De Petter" <andy@techos.be> To: <freebsd-hackers@freebsd.org> Subject: memory disk problem (mounted memory "hangs") Message-ID: <NMEIJMCFCECINGDHLNMOOEHMFBAA.andy@techos.be>
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Hello,
I have a machine, with 2Gb physical memory, of which I mount 512Mb as a
filesystem (/dev/md0c). This partition is very heavily used, and the
machine hangs after a certain amount of time, for no obvious reason.
What I've found is this, to be configured during kernel compilation
time:
--
#
# Set the number of PV entries per process. Increasing this can
# stop panics related to heavy use of shared memory. However, that can
# (combined with large amounts of physical memory) cause panics at
# boot time due the kernel running out of VM space.
#
# If you're tweaking this, you might also want to increase the sysctls
# "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
#
# The value below is the one more than the default.
#
options "PMAP_SHPGPERPROC=201"
--
Now, I have tried this, and set PMAP_SHPGPERPROC=400, and changed set
"vm.v_free_reserved=1024" and "vm.v_free_min=1500", but still I have the
same problem, that the machine hangs after a certain amount of time.
I'm running FreeBSD 4.2-RELEASE.
Is there anything else, I should take into account, or anything I should
configure, to stop this from happening? Because once the mounted mdisk
"hangs", the only way to unlock the machine, is to reboot it :(
Thanks,
-Andy
--
"For nothing can seem foul to those that win."
- Henry IV, Pt1, Act 5, Sc 1
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