svn commit: r193878 -
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
Dmitry Morozovsky
marck at rinet.ru
Wed Jun 10 06:16:04 UTC 2009
Kip,
On Wed, 10 Jun 2009, Kip Macy wrote:
KM> Author: kmacy
KM> Date: Wed Jun 10 01:21:32 2009
KM> New Revision: 193878
KM> URL: http://svn.freebsd.org/changeset/base/193878
KM>
KM> Log:
KM> As far as I can tell systems that have less than 4GB are more often hurt
KM> by prefetched than helped. On i386 systems and systems with less than 4GB,
KM> prefetch is now disabled by default. I've added a prefetch enable tunable, to
KM> enable prefetching for those systems. The prefetch disable tunable will continue
KM> to unconditionally disable prefetching.
KM>
[snip]
KM> +extern int zfs_prefetch_disable;
KM> +extern int zfs_prefetch_enable;
[snip]
Before the interface is not settled in stone, don't you think simple bool
zfs_prefetch tunable (defauled to what looks more reasonable to partucilar
arch/memsize) is more clean and straightforward?
--
Sincerely,
D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer: marck at FreeBSD.org ]
------------------------------------------------------------------------
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
------------------------------------------------------------------------
More information about the svn-src-all
mailing list