K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2020-02-23T17:59:51.157409Z
K 7
svn:log
V 605
Allow swap_pager_putpages() to allocate one block at a time.

The minimum allocation size of 4 blocks is an old policy that came with
the "new" swap pager in r42957.  Since then the blist allocator has
gotten better at reducing fragmentation; for example, with r349777 it
can return a range that spans multiple leaves.  When swap space is close
to being exhaused, the minimum of 4 blocks most likely exacerbates
memory pressure, so reduce it to 1.

Reported by:	alc
Tested by:	pho
Reviewed by:	alc, dougm, kib
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D23763

END