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Description of problem: file/disk/raid subsystem lock up I am not a kernel hacker: everything that needs disk access freezes, other apps such as gkrellm function ok. sync or reboot freezes too. Didn't try magic SysReq I have four SATA drives, root on Raid1, home on raid5 (all software RAID with 4 partitions each) Version-Release number of selected component (if applicable): stock Fedora 8 kernel; same with 2.6.24.5 How reproducible: build kernel with nice -n 20 make -j12 (failed 2 out of 3 times; however, I remember building it a few times with -j4 with no problems) Steps to Reproduce: 1. COre 2 Quad; 4 SATA drives WD; root on raid1 home on raid5 (partitions of all four drives) 2. build kernel with "nice -n 20 make -j12" on home (raid5) 3. failed 2/3. Actual results: Everything that needs disk freezes (it is bad; cleaning up the filesystems and raid after this takes a lot of time) Expected results: No lock up Additional info: nothing in dmesg What info do you need?
try running with the kernel-debug package installed for a while, and see if you can repeat it with that. Maybe lockdep will pick up something. (it's a stab in the dark, but with no other info, there's not much else to suggest). also echo T >/proc/sysrq-trigger will dump the process state to the dmesg buffer. It's quite large though, so it'll likely overflow, and as you can't write to disk, syslogd is unlikely to help. Hmm, echo S > /proc/sysrq-trigger might be worth a shot, depending on how locked up the VFS is. If you can set up a serial console or netconsole, that may be a better solution to get everything out. There's instructions for both at http://fedoraproject.org/wiki/KernelCommonProblems
Now tried -j4, and during 2nd step it started dumping strange characters to my terminal till it probably failed. Running memtest... so far looks ok
memtest ok. After a few tries I put a new filesystem on home and restored from backup - files must have been already corrupt (causing the strange chars problem), now it compiled with -j4. I tried netconsole (just to see it works before I actually need it) - and there is a problem. Dumping tasks with sysrq didn't work - so I did "dmesg -n 8", retried, and it did dump a few tasks, but froze the machine (mouse cursor was moving, I could move windows with the mouse, but keyboard was dead - forgot to check capslock however) I'll post some system info, but I'll think twice and prepare before I think of reproducing it again with -j12 - it takes a lot of time to restore the system afterwards and netconsole is only partially working. Anything else I could do? (every reproducing would take 1-2 hours of restoring the system)
Created attachment 304334 [details] lspci -vv
Created attachment 304335 [details] lsusb -vv
Created attachment 304336 [details] /proc/mdstat
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