I've done a bit of analysis: cmpxchg fail fault mm=c3945b20 vma=c304ad84 addr=402cb000 write=2048 ptep=c2af5b2c pmd=c2bc5008 entry=886c0f7 new=886c077 current=886c077 Note the Dirty bit is set on entry and not new where it probably should be... ptep_cmpxchg(mm, address, pte, entry, new_entry) This will compare "current"(886c077) with "entry"(886c0f7) which are not equal and the whole thing therefore correctly fails leading to the loop. The following patch (against -mm) cleared the problem up but I'm not sure how correct it is: Index: linux-2.6.12/mm/memory.c =================================================================== --- linux-2.6.12.orig/mm/memory.c 2005-08-08 23:03:45.000000000 +0100 +++ linux-2.6.12/mm/memory.c 2005-08-08 23:04:02.000000000 +0100 @@ -2046,7 +2046,7 @@ return do_wp_page(mm, vma, address, pte, pmd, entry); #endif } - entry = pte_mkdirty(entry); + new_entry = pte_mkdirty(entry); } /* - 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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