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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Create a iSCSI DomU with disks in another DomU running on the same Dom0
On Fri, Dec 21, 2012 at 09:29:39AM +0100, Roger Pau Monné wrote: > Hello, > > I'm trying to use a strange setup, that consists in having a DomU > serving iSCSI targets to the Dom0, that will use this targets as disks > for other DomUs. I've tried to set up this iSCSI target DomU using both > Debian Squeeze/Wheezy (with kernels 2.6.32 and 3.2) and ISCSI > Enterprise Target (IET), and when launching the DomU I get this messages > from Xen: > > (XEN) mm.c:1925:d0 Error pfn 157e68: rd=ffff83019e60c000, > od=ffff830141405000, caf=8000000000000003, taf=7400000000000001 > (XEN) Xen WARN at mm.c:1926 > (XEN) ----[ Xen-4.3-unstable x86_64 debug=y Not tainted ]---- > (XEN) CPU: 0 > (XEN) RIP: e008:[<ffff82c48016ea17>] get_page+0xd5/0x101 > (XEN) RFLAGS: 0000000000010286 CONTEXT: hypervisor > (XEN) rax: 0000000000000000 rbx: ffff830141405000 rcx: 0000000000000000 > (XEN) rdx: ffff82c480300920 rsi: 000000000000000a rdi: ffff82c4802766e8 > (XEN) rbp: ffff82c4802bfbf8 rsp: ffff82c4802bfba8 r8: 0000000000000004 > (XEN) r9: 0000000000000004 r10: 0000000000000004 r11: 0000000000000001 > (XEN) r12: 0000000000157e68 r13: ffff83019e60c000 r14: 7400000000000001 > (XEN) r15: 8000000000000003 cr0: 000000008005003b cr4: 00000000000026f0 > (XEN) cr3: 000000011c180000 cr2: 00007f668d1eb000 > (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e010 cs: e008 > (XEN) Xen stack trace from rsp=ffff82c4802bfba8: > (XEN) ffff830141405000 8000000000000003 7400000000000001 0000000000145028 > (XEN) ffff82f6028a0510 ffff83019e60c000 ffff82f602afcd00 ffff82c4802bfd28 > (XEN) ffff82c4802bfd18 0000000000157e68 ffff82c4802bfc58 ffff82c480109ba3 > (XEN) ffffffffffffffff 0000000000000000 ffff83011c977fb8 0000000061dfc3f0 > (XEN) 0000000000000001 ffffffffffff8000 0000000000000002 ffff83011d555000 > (XEN) ffff83019e60c000 0000000000000000 ffff82c4802bfd98 ffff82c48010c607 > (XEN) ffff82c4802bfd34 ffff82c4802bfd30 ffff82c400000001 000000000011cf90 > (XEN) 0000000000000000 ffff82c4802b8000 ffff82c4802b8000 ffff82c4802b8000 > (XEN) ffff82c4802b8000 ffff82c4802bfd5c 000000029e60c000 ffff82c480300920 > (XEN) ffff82c4802b8000 ffff82c4802bfd38 00000005802bfd38 ffff82c4802b8000 > (XEN) ffff82c400000000 0000000000000001 ffffc90000028b10 ffffc90000028b10 > (XEN) ffff8300dfb03000 0000000000000000 0000000000000000 0000000000145028 > (XEN) 000000000011cf7c 0000000000001000 0000000000157e68 0000000000007ff0 > (XEN) 000000000000027e 000000000042000d 0000000000020b50 ffff8300dfdf0000 > (XEN) ffff82c4802bfd78 ffffc90000028ac0 ffffc90000028ac0 ffff880185f6fd58 > (XEN) ffff880185f6fd78 0000000000000005 ffff82c4802bfef8 ffff82c48010eb65 > (XEN) ffff82c4802bfdc8 ffff82c480300960 ffff82c4802bfe18 ffff82c480181831 > (XEN) 000000000006df66 000032cfdc175ce6 0000000000000000 0000000000000000 > (XEN) 0000000000000000 0000000000000005 ffff82c4802bfe28 ffff8300dfb03000 > (XEN) ffff8300dfdf0000 0000150e11a417f8 0000000000000002 ffff82c480300948 > (XEN) Xen call trace: > (XEN) [<ffff82c48016ea17>] get_page+0xd5/0x101 > (XEN) [<ffff82c480109ba3>] __get_paged_frame+0xbf/0x162 > (XEN) [<ffff82c48010c607>] gnttab_copy+0x4c6/0x91a > (XEN) [<ffff82c48010eb65>] do_grant_table_op+0x12ad/0x1b23 > (XEN) [<ffff82c48022280b>] syscall_enter+0xeb/0x145 > (XEN) > (XEN) grant_table.c:2076:d0 source frame ffffffffffffffff invalid. > (XEN) mm.c:1925:d0 Error pfn 157e68: rd=ffff83019e60c000, > od=ffff830141405000, caf=8000000000000003, taf=7400000000000001 > (XEN) Xen WARN at mm.c:1926 > (XEN) ----[ Xen-4.3-unstable x86_64 debug=y Not tainted ]---- > (XEN) CPU: 0 > (XEN) RIP: e008:[<ffff82c48016ea17>] get_page+0xd5/0x101 > (XEN) RFLAGS: 0000000000010286 CONTEXT: hypervisor > (XEN) rax: 0000000000000000 rbx: ffff830141405000 rcx: 0000000000000000 > (XEN) rdx: ffff82c480300920 rsi: 000000000000000a rdi: ffff82c4802766e8 > (XEN) rbp: ffff82c4802bfbf8 rsp: ffff82c4802bfba8 r8: 0000000000000004 > (XEN) r9: 0000000000000004 r10: 0000000000000004 r11: 0000000000000001 > (XEN) r12: 0000000000157e68 r13: ffff83019e60c000 r14: 7400000000000001 > (XEN) r15: 8000000000000003 cr0: 000000008005003b cr4: 00000000000026f0 > (XEN) cr3: 000000011c180000 cr2: 00007f668d1eb000 > (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e010 cs: e008 > (XEN) Xen stack trace from rsp=ffff82c4802bfba8: > (XEN) ffff830141405000 8000000000000003 7400000000000001 000000000014581d > (XEN) ffff82f6028b03b0 ffff83019e60c000 ffff82f602afcd00 ffff82c4802bfd28 > (XEN) ffff82c4802bfd18 0000000000157e68 ffff82c4802bfc58 ffff82c480109ba3 > (XEN) ffffffffffffffff 0000000000000000 ffff83011c977fb8 0000000061dfc308 > (XEN) 0000000000000000 ffffffffffff8000 0000000000000001 ffff83011d555000 > (XEN) ffff83019e60c000 0000000000000000 ffff82c4802bfd98 ffff82c48010c607 > (XEN) ffff82c4802bfd34 ffff82c4802bfd30 ffff82c400000001 000000000011cf90 > (XEN) 0000000000000000 ffff82c4802b8000 ffff82c4802b8000 ffff82c4802b8000 > (XEN) ffff82c4802b8000 ffff82c4802bfd5c 000000029e60c000 ffff82c480300920 > (XEN) ffff82c4802b8000 ffff82c4802bfd38 00000002802bfd38 ffff82c4802b8000 > (XEN) ffffffff00000000 0000000000000001 ffffc90000028b60 ffffc90000028b60 > (XEN) ffff8300dfb03000 0000000000000000 0000000000000000 000000000014581d > (XEN) 00000000000deb3e 0000000000001000 0000000000157e68 000000000b507ff0 > (XEN) 0000000000000261 000000000042000d 00000000000204b0 ffffc90000028b38 > (XEN) 0000000000000002 ffffc90000028b38 ffffc90000028b38 ffff880185f6fd58 > (XEN) ffff880185f6fd78 0000000000000005 ffff82c4802bfef8 ffff82c48010eb65 > (XEN) ffff82c4802bfdc8 ffff82c480300960 ffff82c4802bfe18 ffff82c480181831 > (XEN) 000000000006df66 000032cfdc175ce6 0000000000000000 0000000000000000 > (XEN) 0000000000000000 0000000000000005 ffff82c4802bfe28 0000000000000086 > (XEN) ffff82c4802bfe28 ffff82c480125eae ffff83019e60c000 0000000000000286 > (XEN) Xen call trace: > (XEN) [<ffff82c48016ea17>] get_page+0xd5/0x101 > (XEN) [<ffff82c480109ba3>] __get_paged_frame+0xbf/0x162 > (XEN) [<ffff82c48010c607>] gnttab_copy+0x4c6/0x91a > (XEN) [<ffff82c48010eb65>] do_grant_table_op+0x12ad/0x1b23 > (XEN) [<ffff82c48022280b>] syscall_enter+0xeb/0x145 > (XEN) > (XEN) grant_table.c:2076:d0 source frame ffffffffffffffff invalid. > > (Note that I've added a WARN() to mm.c:1925 to see where the > get_page call was coming from). > > Connecting the iSCSI disks to another Dom0 works fine, so this > problem only happens when trying to connect the disks to the > Dom0 where the DomU is running. Is this happening when the 'disks' are exported to the domUs? Are they exported via QEMU or xen-blkback? > > I've replaced the Linux DomU serving iSCSI targets with a > NetBSD DomU, and the problems disappears, and I'm able to > attach the targets shared by the DomU to the Dom0 without > issues. > > The problem seems to come from netfront/netback, does anyone > have a clue about what might cause this bad interaction > between IET and netfront/netback? Or it might be that we are re-using the PFN for blkback/blkfront and using the m2p overrides and overwritting the netfront/netback m2p overrides? Is this with an HVM domU or PV domU? > > Thanks, Roger. > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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