Date: Wed, 14 May 2003 13:37:59 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "Greg 'groggy' Lehey" <grog@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/geom geom_disk.c Message-ID: <30440.1052912279@critter.freebsd.dk> In-Reply-To: Your message of "Wed, 14 May 2003 17:40:41 %2B0930." <20030514081041.GD4390@wantadilla.lemis.com>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <20030514081041.GD4390@wantadilla.lemis.com>, "Greg 'groggy' Lehey" writes: >malloc() of "16" with the following non-sleepablelocks held: >exclusive sleep mutex g_xup r = 0 (0xc8612ca8) locked @ /src/FreeBSD/5-CURRENT-ZAPHOD/src/sys/geom/geom_io.c:363 This is a problem, you cannot sleep in the primary I/O path (ie: strategy() and done()), if you sleep in the I/O path, you stop all I/O processing and if the system needs to page something out to make the ram available to you, you have a deadlock. >panic: final g_dev_close() with outstanding bios This means that close was called before all the I/O requests had been delivered, this is not allowed. You have to stop sending I/Os, wait for the ones you have sent to come back, then you can close. Otherwise the I/O's arriving after the close will be very likely to access stuff which is no longer there, and result in really weird random memory corruption. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?30440.1052912279>