Date: Wed, 24 Jul 2013 13:19:30 +0200 From: "Ronald Klop" <ronald-freebsd8@klop.yi.org> To: "Julian H. Stacey" <jhs@berklix.com>, "Maurizio Vairani" <maurizio.vairani@cloverinformatica.it> Cc: freebsd-fs@freebsd.org, freebsd-stable@freebsd.org Subject: Re: [SOLVED] Re: Shutdown problem with an USB memory stick as ZFS cache device Message-ID: <op.w0p4esig8527sy@ronaldradial.versatec.local> In-Reply-To: <51E79EAD.5040602@cloverinformatica.it> References: <201307171529.r6HFT4EK063849@fire.js.berklix.net> <51E79EAD.5040602@cloverinformatica.it>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, 18 Jul 2013 09:52:13 +0200, Maurizio Vairani <maurizio.vairani@cloverinformatica.it> wrote: > On 17/07/2013 17:29, Julian H. Stacey wrote: >> Maurizio Vairani wrote: >>> On 17/07/2013 11:50, Ronald Klop wrote: >>>> On Wed, 17 Jul 2013 10:27:09 +0200, Maurizio Vairani >>>> <maurizio.vairani@cloverinformatica.it> wrote: >>>> >>>>> Hi all, >>>>> >>>>> >>>>> on a Compaq Presario laptop I have just installed the latest stable >>>>> >>>>> >>>>> #uname -a >>>>> >>>>> FreeBSD presario 9.2-PRERELEASE FreeBSD 9.2-PRERELEASE #0: Tue Jul 16 >>>>> 16:32:39 CEST 2013 root@presario:/usr/obj/usr/src/sys/GENERIC >>>>> amd64 >>>>> >>>>> >>>>> For speed up the compilation I have added to the pool, tank0, a >>>>> SanDisk memory stick as cache device with the command: >>>>> >>>>> >>>>> # zpool add tank0 cache /dev/da0 >>>>> >>>>> >>>>> But when I shutdown the laptop the process will halt with this screen >>>>> shot: >>>>> >>>>> >>>>> http://www.dump-it.fr/freebsd-screen-shot/2f9169f18c7c77e52e873580f9c2d4bf.jpg.html >>>>> >>>>> >>>>> >>>>> and I need to press the power button for more than 4 seconds to >>>>> switch off the laptop. >>>>> >>>>> The problem is always reproducible. >>>> Does sysctl hw.usb.no_shutdown_wait=1 help? >>>> >>>> Ronald. >>> Thank you Ronald it works ! >>> >>> In /boot/loader.conf added the line >>> hw.usb.no_shutdown_wait=1 >>> >>> Maurizio >> I wonder (from ignorance as I dont use ZFS yet), >> if that merely masks the symptom or cures the fault ? >> >> Presumably one should use a ZFS command to disassociate whatever >> might have the cache open ? (in case something might need to be >> written out from cache, if it was a writeable cache ?) >> >> I too had a USB shutdown problem (non ZFS, now solved)& several people >> made useful comments on shutdown scripts etc, so I'm cross referencing: >> >> http://lists.freebsd.org/pipermail/freebsd-mobile/2013-July/012803.html >> >> Cheers, >> Julian > Probably it masks the symptom. Andriy Gapon hypothesizes a bug in the > ZFS clean up code: > http://lists.freebsd.org/pipermail/freebsd-fs/2013-July/017857.html > > Surely one can use a startup script with the command: > zpool add tank0 cache /dev/da0 > and a shutdown script with: > zpool remove tank0 /dev/da0 > but this mask the symptom too. > > I prefer the Ronald solution because: > - is simpler: it adds only one line (hw.usb.no_shutdown_wait=1) to one > file (/boot/loader.conf). > - is fastest: the zpool add/remove commands take time and > “hw.usb.no_shutdown_wait=1” in /boot/loader.conf speeds up the shutdown > process. > - is cleaner: the zpool add/remove commands pair will fill up the tank0 > pool history. > > Regards > Maurizio Keep an eye on this commit when it is merged to 9-stable. http://svnweb.freebsd.org/changeset/base/253606 It might be the fix of the problem. Ronald.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?op.w0p4esig8527sy>