Date: Thu, 16 Sep 1999 22:09:25 -0700 (PDT) From: Matt Dillon <dillon@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/vm swap_pager.c swap_pager.h Message-ID: <199909170509.WAA51614@freefall.freebsd.org>
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dillon 1999/09/16 22:09:25 PDT
Modified files:
sys/vm swap_pager.c swap_pager.h
Log:
Fix a number of spl bugs related to reserving and freeing swap space.
Swap space can be freed from an interrupt and so swap reservation and
freeing must occur at splvm.
Add swap_pager_reserve() code to support a new swap pre-reservation
capability for the VN device.
Generally cleanup the swap code by simplifying the swp_pager_meta_build()
static function and consolidating the SWAPBLK_NONE test from a bit test
to an absolute compare. The bit test was left over from a rejected
swap allocation scheme that was not ultimately committed. A few other
minor cleanups were also made.
Reorganize the swap strategy code, again for VN support, to not
reallocate swap when writing as this messes up pre-reservation and
can fragment I/O unnecessarily as VN-baesd disk is messed around with.
Reviewed by: Alan Cox <alc@cs.rice.edu>, David Greenman <dg@root.com>
Revision Changes Path
1.126 +234 -293 src/sys/vm/swap_pager.c
1.26 +3 -2 src/sys/vm/swap_pager.h
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