Tso & Eric, I'll try again to reproduce the error, but when the system freezes, I have the X interface running. And, indeed, I'm not familiar with the behaviour of sysreq. Which sysrq should I use when the problem happens? Will the system change to the text interface? If there are no disk activity (all leds are off), where the information will be recorded? -- Berendsen -----Original Message----- From: Eric Sandeen <sandeen@xxxxxxxxxx> To: Theodore Tso <tytso@xxxxxxx> Cc: Andreas Friedrich Berendsen <afberendsen@xxxxxxxxx>, linux-ext4@xxxxxxxxxxxxxxx Subject: Re: possible ext4 race situation freezing linux Date: Tue, 24 Feb 2009 09:38:17 -0600 Theodore Tso wrote: > On Wed, Feb 25, 2009 at 01:22:22AM +1300, Andreas Friedrich Berendsen wrote: >> Kernel version: 2.26.28.7 >> efs2progs version: 1.41.4 >> arch: x86_64 (amd) >> >> I made this test four times and the results were the same: linux >> freezes and becomes unresponsive. Only solution is to reset the box. I >> do not know if the problem is with the USB devices sub-subsystem or a >> possible ext4 race condition. > > Can you use alt-sysrq to get some stack traces or a register dump out, > so we can see where the kernel is hanging? > > - Ted alt-sysrq-w would be a good place to start (just in case you're not familiar w/ the sysrq keys) It'd also be great to test w/ 2.6.29, as a deadlock was fixed there recently (it's on its way to .28.x too AFAIK) Thanks, -Eric -- __________________________________________ Andreas Friedrich Berendsen SCA OCP MSCA A+ Linux+ Network+ HpMASE -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
