Date: Fri, 11 May 2012 21:50:17 GMT From: Jeff Kletsky <freebsd@wagsky.com> To: freebsd-fs@FreeBSD.org Subject: Re: kern/167685: [zfs] ZFS on USB drive prevents shutdown / reboot Message-ID: <201205112150.q4BLoHUD097623@freefall.freebsd.org>
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The following reply was made to PR kern/167685; it has been noted by GNATS. From: Jeff Kletsky <freebsd@wagsky.com> To: bug-followup@FreeBSD.org Cc: Subject: Re: kern/167685: [zfs] ZFS on USB drive prevents shutdown / reboot Date: Fri, 11 May 2012 14:41:03 -0700 This is a multi-part message in MIME format. --------------020209050805030409070009 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Problem can be replicated by booting of a "memstick" (with a "spare" USB stick as /dev/da1) and then executing # dd if=/dev/zer of=/dev/da1 bs=64k # zpool create stick /dev/da1 # reboot Problem has been reliably reproduced on the Atom 330 previously mentioned, as well as on an AMD A8-3870 with A75 chipset. It also can be replicated using VirtualBox running under Ubuntu on the AMD A8-3870 system. It does not seem specific to one "flavor" of USB controller or driver. Using /usr/src/release/generate_release.sh and bisection, I have confirmed that * r227445 does not exhibit the behavior ("Copy stable/9 to releng/9.0 as part of the FreeBSD 9.0-RELEASE release cycle) * r229097 does not exhibit the behavior * r229281 -- FAIL by not rebooting under the conditions described above. Based on these results, I am suspicious of r229100 | hselasky | 2011-12-31 06:33:15 -0800 (Sat, 31 Dec 2011) | 6 lines MFC r228709, r228711 and r228723: - Add missing unlock of USB controller's lock, when doing shutdown, suspend and resume. - Add code to wait for USB shutdown to be executed at system shutdown. - Add sysctl which can be used to skip this waiting. as being what brought the issue to the forefront. I am presently building r229099 and r229100 to confirm this suspicion. A potential, though untested workaround would be # sysctl hw.usb.no_shutdown_wait=1 --------------020209050805030409070009 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> </head> <body bgcolor="#FFFFFF" text="#000000"> Problem can be replicated by booting of a "memstick" (with a "spare" USB stick as /dev/da1) and then executing<br> <br> # dd if=/dev/zer of=/dev/da1 bs=64k<br> # zpool create stick /dev/da1<br> # reboot<br> <br> Problem has been reliably reproduced on the Atom 330 previously mentioned, as well as on an AMD A8-3870 with A75 chipset. It also can be replicated using VirtualBox running under Ubuntu on the AMD A8-3870 system. It does not seem specific to one "flavor" of USB controller or driver.<br> <br> Using /usr/src/release/generate_release.sh and bisection, I have confirmed that<br> <br> * r227445 does not exhibit the behavior ("Copy stable/9 to releng/9.0 as part of the FreeBSD 9.0-RELEASE release cycle)<br> * r229097 does not exhibit the behavior<br> * r229281 -- FAIL by not rebooting under the conditions described above.<br> <br> Based on these results, I am suspicious of <br> <br> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> <pre class="alt2" dir="ltr" style="background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(249, 249, 249); color: rgb(0, 0, 0); font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; margin-top: 0px; margin-right : 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 6px; padding-right: 6px; padding-bottom: 6px; padding-left: 6px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: inset; border-right-style: inset; border-bottom-style: inset; border-left-style: inset; border-color: initial; border-image: initial; width: auto; height: 130px; text-align: left; overflow-x: auto; overflow-y: auto; background-position: initial i ni t ial; background-repeat: initial initial; ">r229100 | hselasky | 2011-12-31 06:33:15 -0800 (Sat, 31 Dec 2011) | 6 lines MFC r228709, r228711 and r228723: - Add missing unlock of USB controller's lock, when doing shutdown, suspend and resume. - Add code to wait for USB shutdown to be executed at system shutdown. - Add sysctl which can be used to skip this waiting.</pre> <br> as being what brought the issue to the forefront.<br> <br> I am presently building r229099 and r229100 to confirm this suspicion.<br> <br> A potential, though untested workaround would be<br> # sysctl hw.usb.no_shutdown_wait=1<br> <br> <br> </body> </html> --------------020209050805030409070009--
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