On Tue, 10 Jun 2014 15:38:00 -0700 Doug Anderson <diand...@chromium.org> wrote:
> Hi, > > Recently, both Andrew Bresticker (CCed) and I have noticed errors > reported by slub_debug when using linuxnext. I'm still seeing them on > 20140606. > > > NOTES: > * errors only seem to be present when you've got CONFIG_PREMPT enabled. > > * errors seem to happen most often when rebooting, but I've seen them > during other times as well. > > * a quick guesstimate is that ~50% of my reboots show this problem. > > * I'm testing on an exynos5250-based board and Andrew on an ARM board > with a different SoC. > > * I don't see issues on a current fetch of "linux", AKA (5b174fd Merge > branch 'for-3.16' of git://linux-nfs.org/~bfields/linux) > > > I didn't do a full bisect, but I don't seem to see issues on 20140528. > On 20140530 I see almost constant slub errors (seems much worse than > 20140606) > > An example error is below: > > > [ 13.521842] > ============================================================================= > [ 13.528566] BUG bio-1 (Not tainted): Poison overwritten > [ 13.533765] > ----------------------------------------------------------------------------- > [ 13.533765] > [ 13.543394] Disabling lock debugging due to kernel taint > [ 13.548685] INFO: 0xec495848-0xec49584f. First byte 0x80 instead of 0x6b > [ 13.555378] INFO: Allocated in mempool_alloc_slab+0x24/0x28 age=28 > cpu=5 pid=220 > [ 13.562741] kmem_cache_alloc+0x90/0x1d0 > [ 13.566640] mempool_alloc_slab+0x24/0x28 > [ 13.570631] mempool_alloc+0x4c/0x144 > [ 13.574279] bio_alloc_bioset+0xa4/0x1b0 > [ 13.578182] __split_and_process_bio+0x33c/0x3f0 > [ 13.582778] dm_request+0x1f0/0x204 > [ 13.586248] generic_make_request+0xa4/0xdc > [ 13.590411] submit_bio+0x114/0x144 This one is possibly a bug in DM or the BIO layer. Do you have more examples? I couldn't locate a report from Andrew. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
