Date: Sun, 31 Aug 2008 22:45:16 -0500 (CDT) From: Wes Morgan <morganw@chemikals.org> To: John Birrell <jb@what-creek.com> Cc: stable@freebsd.org Subject: Re: Unresponsive after dtrace Message-ID: <alpine.BSF.1.10.0808312243540.52681@ibyngvyr.purzvxnyf.bet> In-Reply-To: <20080901015258.GA56694@what-creek.com> References: <alpine.BSF.1.10.0808310627390.45643@ibyngvyr.purzvxnyf.bet> <20080901015258.GA56694@what-creek.com>
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On Mon, 1 Sep 2008, John Birrell wrote: > On Sun, Aug 31, 2008 at 06:35:16AM -0500, Wes Morgan wrote: >> I know this has been reported already, but I want to give a "me too". >> After installing a new world and kernel from the tree yesterday afternoon, >> I let my system run all night. This morning everything was extremely >> sluggish and unresponsive. According to top, which I thankfully left >> running, processes were going in and out of "*kmem_" (obviously >> truncated). CPU usage was 80+% system and load averages were around 5.4. >> The only changes I made to my system besides upgrading were to include the >> options KDB, DDB and STACK in my kernel for zfs functionality. >> Unfortunately, I cannot try without those options since my root is zfs. >> Booting a kernel from 8/20 works fine. > > Wes, will you please try removing "#define KMEM_DEBUG" from: > > src/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c > > This is the likely cause of the performance problems you are seeing. It > is also the reason why you needed to add DDB, DBB and stack to the kernel. > > The quickest way to try this is to just build the 'opensolaris' kernel module: > > (keep a copy of your current /boot/kernel) > cd src/sys/modules/opensolaris > make obj && make depend && make all && make install Everything compiled with my original kern config (no STACK etc). I'll let it go for a bit and see, but I don't see any processes going into "kmem_" in top yet.
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