Date: Sun, 17 Feb 2002 20:40:46 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: freebsd-stable@freebsd.org Subject: FFS node recycling? Message-ID: <15472.23454.686939.502647@grasshopper.cs.duke.edu>
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How & how often do FFS nodes get free'd?
I recently had a lockup on my workstation. (alpha UP1000, 640MB,
4.5-STABLE, also an NFS server for my various testboxes in my home
office). I was doing a local cvs diff on the src/sys tree, as well as
building a kernel, and doing a few other things (xemacs, gnome,
sawfish, konqueror, 20 or so shells). The cvs diff got wedged in (I
think) inode.
At this point, I noticed that the FFS node malloc pool seemed to be
quite near its limit. I killed the make and tried to recover, but I
couldn't seem to get the number of FFS node allocations down & other
jobs started to wedge on IO. I was intending to drop into the
debugger and get a dump, but the machine locked solid when I
attmpted to vty-switch out of X.
I've so far been unable to reproduce the problem.
BTW - since this happened, I've been paying close attention to what vmstat
says about FFS node usage:
% vmstat -m | grep FFS
512 ATA generic, UFS dirhash, FFS node, newblk, NFSV3 srvdesc,
FFS node 23670 11835K 11861K 79618K 336089 0 0 512
Is this normal?
Thanks,
Drew
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