Messages in this thread | | | From | "Adam J. Richter" <> | Date | Sat, 21 Dec 2002 01:43:20 -0800 | Subject | Re: linux-2.5.40 64GB highmem BUG() |
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>> Although 2.5.40 has been out for a while, I think I ought >> to post this bug as I haven't seen any other mention of it. >> When I boot an 2.5.40 x86 kernel built with CONFIG_HIGHMEM64G, >> and with a 920kB initial ramdisk (2.2MB uncompressed), I get a kernel >> BUG() at highmem.c line 480, preceded by a message saying "scheduling >> with KM_TYPE 15 held!" The machine on which I experienced this >> problem has 1.25GB of RAM. The problem occurs with and without >> CONFIG_PREEMPT. All kernels that tried were SMP kernels running on a >> uniprocessor.
>This is not reproducible here with 2.5.52-mm2. Is the initrd required >to trigger this?
Yes, the initrd seems to be required. It happens when the initrd attempts to mount /proc (it runs a shell script that starts by setting PATH, mounting /dev, and mounting /proc).
I've verified that under 2.5.52 the problem occurs with CONFIG_HIGHME64G and not with CONFIG_HIGHMEM4G. Actually, now the problem is a BUG() at slab.c:1451, which is also memory corruption, and I suspect just an evolution of the same problem from 2.5.40.
Anyhow, in case it helps you, I've put the vmlinux and initrd that produce this problem in ftp://ftp.yggdrasil.com/private/adam/for-wli/. Note that the ramdisk has kernel modules that don't match the kernel but that's not the issue, as I configured that kernel to have a different version name.
Thanks for your attention to this problem.
Adam J. Richter __ ______________ 575 Oroville Road adam@yggdrasil.com \ / Milpitas, California 95035 +1 408 309-6081 | g g d r a s i l United States of America "Free Software For The Rest Of Us." - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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