On Fri, 2005-08-05 at 08:17 -0700, Christoph Lameter wrote: > On Thu, 4 Aug 2005, Richard Purdie wrote: > > > > We know the the failure case can be identified by the > > cmpxchg_fail_flag_update condition being met. Can you provide me with a > > patch to dump useful debugging information when that occurs? > > Well yes simply print out the information available in that context. > > + printk(KERN_CRIT "cmpxchg fail mm=%p vma=%p addr=%lx write=%d ptep=%p pmd=%p entry=%lx new=%lx\n", > + mm, vma, address, write_access, pte, pmd, pte_val(entry), pte_val(new_entry)); Ok, this results in an infinite loop of one message with no change to the numbers: cmpxchg fail mm=c3455ae0 vma=c355517c addr=4025f000 write=2048 ptep=c2f0597c pmd=c2b79008 entry=88000f7 new=8800077 Richard - 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/
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