Date: Tue, 9 Mar 2004 20:44:43 -0800 (PST) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/i386 vm_machdep.c src/sys/vm uma_core.c vm_fault.c Message-ID: <200403100444.i2A4ihp6024139@repoman.freebsd.org>
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alc 2004/03/09 20:44:43 PST
FreeBSD src repository
Modified files:
sys/i386/i386 vm_machdep.c
sys/vm uma_core.c vm_fault.c
Log:
- Make the acquisition of Giant in vm_fault_unwire() conditional on the
pmap. For the kernel pmap, Giant is not required. In general, for
other pmaps, Giant is required by i386's pmap_pte() implementation.
Specifically, the use of PMAP2/PADDR2 is synchronized by Giant.
Note: In principle, updates to the kernel pmap's wired count could be
lost without Giant. However, in practice, we never use the kernel
pmap's wired count. This will be resolved when pmap locking appears.
- With the above change, cpu_thread_clean() and uma_large_free() need
not acquire Giant. (The first case is simply the revival of
i386/i386/vm_machdep.c's revision 1.226 by peter.)
Revision Changes Path
1.230 +0 -2 src/sys/i386/i386/vm_machdep.c
1.93 +1 -11 src/sys/vm/uma_core.c
1.186 +4 -2 src/sys/vm/vm_fault.c
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