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3x Kernel Warning mounting OCFS2 in Xen DomU
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babydoe
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Joined: 25 Oct 2009
Posts: 2

PostPosted: Wed Nov 21, 2012 9:14 am    Post subject: 3x Kernel Warning mounting OCFS2 in Xen DomU Reply with quote

I use Gentoo (hardened) paravirtualized on Xen.
Since i started using the Linux 3.5+ series of kernels i noticed a Kernel Warning on DMESG when mounting OCFS2 in the DOMU.
Code:

ocfs2: Mounting device (202,32) on (node 4, slot 4) with ordered data mode.
------------[ cut here ]------------
WARNING: at net/core/skbuff.c:3448 skb_try_coalesce+0x378/0x3b0()
Modules linked in:
Pid: 1627, comm: mount.ocfs2 Not tainted 3.6.6-hardened-r1 #1
Call Trace:
 <IRQ>  [<ffffffff8104141b>] ? warn_slowpath_common+0x7b/0xc0
 [<ffffffff8140e2c8>] ? skb_try_coalesce+0x378/0x3b0
 [<ffffffff81453d2a>] ? tcp_try_coalesce+0x7a/0xd0
 [<ffffffff812ee72b>] ? o2net_data_ready+0x5b/0x110
 [<ffffffff81453dc5>] ? tcp_queue_rcv+0x45/0xd0
 [<ffffffff814595d5>] ? tcp_rcv_established+0x295/0x610
 [<ffffffff81460c42>] ? tcp_v4_do_rcv+0x132/0x330
 [<ffffffff8109bc27>] ? handle_edge_irq+0x67/0x100
 [<ffffffff8146390b>] ? tcp_v4_rcv+0x7cb/0x8c0
 [<ffffffff814630fc>] ? tcp_v4_early_demux+0x10c/0x150
 [<ffffffff8144047f>] ? ip_local_deliver_finish+0x9f/0x1c0
 [<ffffffff81416da9>] ? __netif_receive_skb+0x279/0x560
 [<ffffffff810b33c6>] ? free_hot_cold_page+0x126/0x1b0
 [<ffffffff814187c4>] ? netif_receive_skb+0x24/0x80
 [<ffffffff813d6cac>] ? xennet_poll+0xa4c/0xc00
 [<ffffffff8132f6e2>] ? __freed_request+0xb2/0xc0
 [<ffffffff8141ac46>] ? net_rx_action+0x96/0x150
 [<ffffffff81049177>] ? __do_softirq+0xa7/0x150
 [<ffffffff8137e127>] ? __xen_evtchn_do_upcall+0x207/0x250
 [<ffffffff814aad8c>] ? call_softirq+0x1c/0x30
 [<ffffffff8100c80d>] ? do_softirq+0x5d/0x90
 [<ffffffff8104944d>] ? irq_exit+0x5d/0x70
 [<ffffffff8137fe97>] ? xen_evtchn_do_upcall+0x27/0x40
 [<ffffffff814aadde>] ? xen_do_hypervisor_callback+0x1e/0x30
 <EOI>  [<ffffffff8100122a>] ? hypercall_page+0x22a/0x1000
 [<ffffffff8100122a>] ? hypercall_page+0x22a/0x1000
 [<ffffffff81006e29>] ? xen_force_evtchn_callback+0x9/0x10
 [<ffffffff81007442>] ? check_events+0x12/0x20
 [<ffffffff8100742f>] ? xen_restore_fl_direct_reloc+0x4/0x4
 [<ffffffff8100643c>] ? __xen_pgd_pin+0xdc/0x130
 [<ffffffff810064a9>] ? xen_dup_mmap+0x19/0x20
 [<ffffffff8103f43b>] ? dup_mm+0x34b/0x480
 [<ffffffff8103fdb9>] ? copy_process+0x819/0x1160
 [<ffffffff810407d4>] ? do_fork+0xa4/0x330
 [<ffffffff810ea230>] ? __fput+0x160/0x220
 [<ffffffff81107225>] ? mntput_no_expire+0x25/0x170
 [<ffffffff814a9f43>] ? stub_clone+0x13/0x20
 [<ffffffff814a9c40>] ? system_call_fastpath+0x18/0x1d
---[ end trace 4493c39bb94d78f8 ]---
o2dlm: Joining domain CAABF4CD3E4849F5B06EAAA60D66BAAD ( 0 1 2 3 4 ) 5 nodes
ocfs2: Mounting device (202,48) on (node 4, slot 4) with ordered data mode.

I have tested the 3.5 and 3.6 kernel sources and i get the same Warning.
Even though everything is running, I'm wondering if anyone has an idea what this is (and if there is something that can be done to get rid of it ... No ... taking OCFS2 out is not an option ;) )
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