Date: Sat, 30 Oct 1999 08:20:32 -0700 (PDT) From: Andrew Gallatin <gallatin@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/alpha swtch.s Message-ID: <199910301520.IAA33701@freefall.freebsd.org>
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gallatin 1999/10/30 08:20:32 PDT
Modified files:
sys/alpha/alpha swtch.s
Log:
Don't lower the ipl when returning from handling an interrupt.
If the ipl is lowered here, a machine can rapidly run out of stack
space when it is under heavy interrupt load. Without this fix,
my test machine would fall over within a few seconds when forwarding
14,000 packets/sec. With the patch, it has been up for over 24 hours
and has built the world at the same time.
submitted by: dfr@freebsd.org
Revision Changes Path
1.12 +1 -4 src/sys/alpha/alpha/swtch.s
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