Date: Wed, 23 Jul 1997 14:25:32 -0700 (PDT) From: Steve Passe <fsmp@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/i386/isa apic_ipl.s Message-ID: <199707232125.OAA19082@freefall.freebsd.org>
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fsmp 1997/07/23 14:25:31 PDT
Modified files:
sys/i386/isa apic_ipl.s
Log:
Fixed possible deadlock from recursive INTs on same cpu. Since
we use lazy masking INTREN()/INTRDIS() might be called with INTs enabled.
This means another higher prio INT to the same cpu could attempt to
re-enter the critical region, but would spin waiting for the lock. Since
it is the owner, it would deadlock.
Revision Changes Path
1.9 +9 -3 src/sys/i386/isa/apic_ipl.s
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