Date: Fri, 22 Aug 2003 23:52:32 -0700 (PDT) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/vm vm_fault.c Message-ID: <200308230652.h7N6qbaO089796@repoman.freebsd.org>
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alc 2003/08/22 23:52:32 PDT
FreeBSD src repository
Modified files:
sys/vm vm_fault.c
Log:
To implement the sequential access optimization, vm_fault() may need to
reacquire the "first" object's lock while a backing object's lock is held.
Since this is a lock-order reversal, vm_fault() uses trylock to acquire
the first object's lock, skipping the sequential access optimization in
the unlikely event that the trylock fails.
Revision Changes Path
1.175 +10 -8 src/sys/vm/vm_fault.c
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