Date: Sun, 12 Dec 2004 20:45:07 +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/vm vm_page.c vm_page.h Message-ID: <200412122045.iBCKj7sl069126@repoman.freebsd.org>
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alc 2004-12-12 20:45:07 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_5)
sys/vm vm_page.c vm_page.h
Log:
MFC vm_page.c's revision 1.294 and vm_page.h's revision 1.134
Introduce VM_ALLOC_NOBUSY, an option to vm_page_alloc() and vm_page_grab()
that indicates that the caller does not want a page with its busy flag
set. In many places, the global page queues lock is acquired and released
just to clear the busy flag on a just allocated page. Both the allocation
of the page and the clearing of the busy flag occur while the containing
vm object is locked. So, the busy flag might as well never be set.
MFC vm_page.c's revision 1.298
This change (1) eliminates the calls to vm_page_busy() that
immediately precede a call to vm_page_remove() or functions, such as
vm_page_free() and vm_page_rename(), that call it and (2) relaxes the
requirement in vm_page_remove() that the vm page's PG_BUSY flag is
set.
Revision Changes Path
1.290.2.2 +8 -16 src/sys/vm/vm_page.c
1.132.2.1 +1 -0 src/sys/vm/vm_page.h
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