Date: Fri, 22 Apr 2005 18:55:34 +0200 From: "Daniel Eriksson" <daniel_k_eriksson@telia.com> To: "'FreeBSD Current'" <freebsd-current@freebsd.org> Subject: RE: Serious I/O problems (bad performance and live-lock) Message-ID: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAATvsB5exMo0K7%2BhAP338oqAEAAAAA@telia.com> In-Reply-To: <426925C7.3030004@samsco.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Scott Long wrote: > Ok, next test would be to turn off mpsafevm. This is just a simple > guess, though, but and changes in the behaviour would be very > interesting to note. With debug.mpsafevfs="0" and debug.mpsafevm="0" it doesn't seem like I can force the machine into live-lock. No matter how long I let 'dd' run I can still abort it with CTRL-C easily. However, after a few minutes the machine becomes mostly useless because it takes 30-60 seconds to execute simple commands such as ps or ls. According to 'top', the dd process spend most of its time in "wdrain" state. /Daniel Eriksson
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAATvsB5exMo0K7%2BhAP338oqAEAAAAA>