Date: Fri, 1 May 1998 08:11:00 -0700 (PDT) From: Peter Wemm <peter@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/kern vfs_bio.c Message-ID: <199805011511.IAA14728@freefall.freebsd.org>
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peter 1998/05/01 08:11:00 PDT
Modified files:
sys/kern vfs_bio.c
Log:
vm_page_is_valid() wasn't expecting a large offset argument, it's
expecting a sub-page offset. We were passing the file position,
and vm_page_bits() could do some interesting things when base was
larger PAGE_SIZE.
if (size > PAGE_SIZE - base)
size = PAGE_SIZE - base;
is interesting when (PAGE_SIZE - base) is negative. I could imagine that
this could have interesting consequences for memory page -> device block
bit validation.
Revision Changes Path
1.164 +3 -2 src/sys/kern/vfs_bio.c
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