Date: Fri, 22 Mar 2002 20:20:01 -0800 (PST) From: Jake Burkholder <jake@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/sparc64/include tlb.h Message-ID: <200203230420.g2N4K1C40817@freefall.freebsd.org>
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jake 2002/03/22 20:20:00 PST
Modified files:
sys/sparc64/include tlb.h
Log:
Fix a deadlock condition with tlb shootdown ipi delivery. Since ipis are
not blocked by raising the pil, a reciever may be interrupted while holding
a spinlock. If the sender does not defer interrupts throughout the entire
operation it may be interrupted and try to acquire a spinlock held by a
reciever, leading to a deadlock due to the synchronization used by the
ipi handlers themselves.
Submitted by: tmm
Revision Changes Path
1.15 +17 -0 src/sys/sparc64/include/tlb.h
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