Date: Sat, 16 Oct 2004 22:32:50 +0000 (UTC) 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 Message-ID: <200410162232.i9GMWowZ039339@repoman.freebsd.org>
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alc 2004-10-16 22:32:50 UTC
FreeBSD src repository
Modified files:
sys/i386/i386 vm_machdep.c
Log:
When sf_buf_alloc() replaces a virtual-to-physical mapping, it needn't
invalidate the TLB(s) if the old mapping wasn't used by the CPU. With
network interfaces that implement checksum off-loading, the old mapping is
almost never used by the CPU, only by the device driver for setting up the
DMA operation.
Reviewed by: tegge@
Revision Changes Path
1.242 +15 -1 src/sys/i386/i386/vm_machdep.c
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