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Date: Mon, 21 Apr 2008 15:17:43 +0200 From: Ingo Molnar <mingo@...e.hu> To: "Rafael J. Wysocki" <rjw@...k.pl> Cc: LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-ext4@...r.kernel.org Subject: Re: 2.6.25-git2: BUG: unable to handle kernel paging request at ffffffffffffffff * Rafael J. Wysocki <rjw@...k.pl> wrote: > Hi, > > I've just got the following traces from 2.6.25-git2 on HP nx6325 > (64-bit). I think they are related to the hang I described yesterday: > [12844.112673] [<ffffffff8029e236>] do_lookup+0x2c/0x1b2 > [12844.112683] [<ffffffff802a04b4>] __link_path_walk+0x8e6/0xdbd > [12844.112707] [<ffffffffa004deb4>] ? :ext3:ext3_xattr_get_acl_default+0x18/0x1a > [12844.112714] [<ffffffff802b0869>] ? generic_getxattr+0x4e/0x5c so you've got ext3. Nothing changed in the VFS or in ext3 in -git yet. the instruction pattern: Code: f6 43 04 10 75 06 f0 ff 03 48 89 d8 fe 43 08 eb 31 fe 43 08 48 8b 45 d0 48 8b 00 48 89 45 d0 48 8b 45 d0 48 85 c0 74 18 48 89 c2 <48> 8b 00 48 8d 5a e8 44 39 73 30 0f 18 08 75 d9 e9 6a ff ff ff ======== shows that you've got "prefetchnta (%esi)" indirect: 0f 18 00 prefetcht0 (%eax) so the prefetch instructions are patched in, neither the compiler nor the CPU should ignore them. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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