Date: Fri, 30 Oct 1998 01:17:17 -0500 (EST) From: Luoqi Chen <luoqi@watermarkgroup.com> To: mike@smith.net.au, peter.jeremy@auss2.alcatel.com.au Cc: hackers@FreeBSD.ORG Subject: Re: sync writes with softupdates enabled Message-ID: <199810300617.BAA01820@lor.watermarkgroup.com>
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> > > > All I can think of is that the MMAP'd history file is causing the > > kernel to unnecessarily perform sync writes to try and keep the > > MMAP and VFS images in sync. > > That's almost certainly correct. Try running without mmap. It used to > be faster that way; maybe it is again? > It may be related to vfs_msync() not respecting MNT_NOWAIT flags when calling vm_object_page_clean(). -lq > -- > \\ Sometimes you're ahead, \\ Mike Smith > \\ sometimes you're behind. \\ mike@smith.net.au > \\ The race is long, and in the \\ msmith@freebsd.org > \\ end it's only with yourself. \\ msmith@cdrom.com > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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