Date: Wed, 5 Jan 2011 13:40:35 +0000 (UTC) From: Marius Strobl <marius@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/sparc64/sparc64 tlb.c Message-ID: <201101051340.p05DepGW019786@repoman.freebsd.org>
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marius 2011-01-05 13:40:35 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_8_2)
sys/sparc64/sparc64 tlb.c
Log:
SVN rev 217006 on 2011-01-05 13:40:35Z by marius
MFC: r216891
Extend the section in which interrupts are disabled in the TLB demap
functions, otherwise if we get preempted after checking whether a certain
pmap is active on the current CPU but before disabling interrupts we might
operate on an outdated state as the pmap might have been deactivated in
the meantime. As the same issue may arises when the TLB demap function is
interrupted by a TLB demap IPI, just entering a critical section before
the check isn't sufficient so we have to fully disable interrupts instead.
Approved by: re (kib)
Revision Changes Path
1.11.2.1.6.2 +6 -6 src/sys/sparc64/sparc64/tlb.c
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