Date: Sat, 17 Jan 2009 14:45:07 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern uipc_cow.c src/sys/vm vm_page.c vm_page.h Message-ID: <200901171446.n0HEkOl3079031@repoman.freebsd.org>
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kib 2009-01-17 14:45:07 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
sys/kern uipc_cow.c
sys/vm vm_page.c vm_page.h
Log:
SVN rev 187364 on 2009-01-17 14:45:07Z by kib
MFC r186719:
Extend the struct vm_page wire_count to u_int to avoid the overflow of
the counter, that may happen when too many sendfile(2) calls are being
executed with this vnode.
To keep the size of the struct vm_page and offsets of the fields
accessed by out-of-tree modules, swap the types and locations of the
wire_count and cow fields. Add safety checks to detect cow overflow and
force fallback to the normal copy code for zero-copy sockets.
Revision Changes Path
1.26.2.1 +5 -1 src/sys/kern/uipc_cow.c
1.357.2.5 +5 -1 src/sys/vm/vm_page.c
1.152.2.1 +4 -4 src/sys/vm/vm_page.h
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