Date: Tue, 16 Feb 1999 15:42:06 -0600 From: Jonathan Lemon <jlemon@americantv.com> To: hackers@freebsd.org Subject: system freeze while core dumping Message-ID: <19990216154205.64792@right.PCS>
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I have a machine running 3.0-STABLE from Jan 31, on which I'm running
a fairly large process. If it coredumps, the entire system appears
to lock up, and no new commands appear to executed until the coredump is
complete (which, at about 117M, takes forever). The machine is a P-II,
with a SCSI disk system (ahc, 2 7200 disks, 20MB/s), and 380MB mem.
Any existing processes appear to run fine. iostat -o shows:
tty fd0 da0 da1 pass0 cpu
tin tout sps tps msps sps tps msps sps tps msps sps tps msps us ni sy in id
0 267 0 0 0.0 5673 154 6.5 0 0 0.0 0 0 0.0 0 0 1 2 98
0 81 0 0 0.0 8851 429 2.3 0 0 0.0 0 0 0.0 0 0 11 1 88
0 673 0 0 0.0 4816 86 11.6 0 0 0.0 0 0 0.0 0 0 0 0100
0 81 0 0 0.0 8118 68 14.6 0 0 0.0 0 0 0.0 0 0 19 0 81
0 540 0 0 0.0 3533 124 8.1 0 0 0.0 0 0 0.0 1 0 0 0 99
0 81 0 0 0.0 3485 121 8.3 0 0 0.0 0 0 0.0 0 0 0 0100
top shows the coredumping process seems to be perpetually waiting
on "getblk".
How can I prevent the dumping process from essentially freezing the
system until it finishes? The problem also exists on a 3.0-CURRENT
machine from November.
--
Jonathan
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