On Tue, 2007-07-17 at 10:45 -0400, John Stoffel wrote: > utz> I have to recompile the fedora kernel rpms (fc6, f7) with 8k > utz> stacks on my i686 server. It's using NFS -> XFS -> DM -> MD > utz> (raid1) -> IDE disks. With 4k stacks it crash (hang) within > utz> minutes after using NFS. With 8k stacks it's rock solid. No > utz> crashes within months. > > Does it give any useful information when it does crash? > No, sorry. Nearly always it lock up so hard that even sysrq didn't work anymore. Most times the console was blanked. If not, there was a line with "do_irq" or something like that (if i remember correctly). A few times it continuous oopsing (scrolling like mad).
I think it's just a stack overflow. Knowing that XFS + long IO stack have problems with 4k stacks. And i have zero crashes with the recompiled 8k stack kernels. (All kernel are the fedora ones). Btw: In the past the server runs on slightly different hardware and without raid1 (NFS -> XFS -> DM -> IDE disk). It runs with 4k stacks. I had a few crashes, but i blame the hardware for it. I don't want to make tests with the server. It's my main data storage and i don't want to risk it. > Can you make > a simple test case using ram disks instead of IDE disks and then > building upon that? Sorry, i don't think i can do this. My other computer, which i can use for tests, is x86_64 based. And IFAIK the problem on the XFS side has something to do with looking for freespace on many AGs. So maybe a bigger and filled filesystem is needed. And 50GB ram disks are out of question. utz - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
