open_issues/xen_crash_copy-size_le_page_size: New page.

1 files changed, 65 insertions, 0 deletions

diff --git a/open_issues/xen_crash_copy-size_le_page_size.mdwn b/open_issues/xen_crash_copy-size_le_page_size.mdwn
new file mode 100644
index 00000000..09287274
--- /dev/null
+++ b/open_issues/xen_crash_copy-size_le_page_size.mdwn
@@ -0,0 +1,65 @@
+[[!meta copyright="Copyright © 2009 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!tag open_issue_gnumach]]
+
+`/dev/hd2` is 2 GiB in size (backed by LVM), unformatted.
+
+    # mkfs.ext2 -o hurd /dev/hd2
+    mke2fs 1.41.7 (29-June-2009)
+    hd2 count 1
+    re-open, hd2 count 2
+    ext2fs_check_if_mount: Can't check if filesystem is mounted due to missing mtab file while determining whether /dev/hd2 is mounted.
+    re-open, hd2 count 3
+    re-open, hd2 count 4
+    re-open, hd2 count 5
+    Filesystem label=
+    OS type: Hurd
+    Block size=4096 (log=2)
+    Fragment size=4096 (log=2)
+    131072 inodes, 524288 blocks
+    26214 blocks (5.00%) reserved for the super user
+    First data block=0
+    Maximum filesystem blocks=536870912
+    16 block groups
+    32768 blocks per group, 32768 fragments per group
+    8192 inodes per group
+    Superblock backups stored on blocks: 
+            32768, 98304, 163840, 229376, 294912
+    
+    Assertion `copy->size <= PAGE_SIZE' failed in file "../gnumach-1-branch-Xen-branch/xen/block.c", line 536
+    Kernel Breakpoint trap, eip 0x20020a77
+    Stopped at  0x20020a76: int     $3
+    db> trace
+    0x20020a76(2006abc1,2006ba03,2006782c,218,2e2be8d4)
+    0x20020ace(2006ba03,2006782c,218,2e3629a0,32000)
+    0x2003e9d5(2de04764,2e2be0b8,12,0,3fff80)
+    0x200476e6(2de5ad54,2e2db010,2e30a9a0,2de3a854,2de5ad44)
+    0x20021ed4(2de5ad44,2e2bb2e0,2e2bb2a0,0,0)
+    0x2005309d(129b8f0,3,38,28,e)
+    0x20006838(129b8f0,3,38,28,e)
+    >>>>> user space <<<<<
+
+
+    $ addr2line -i -f -e /boot/gnumach-xen 0x20020a76 0x20020ace 0x2003e9d5 0x200476e6 0x20021ed4 0x2005309d 0x20006838
+    Debugger
+    /home/tschwinge/tmp/gnumach/gnumach-1-branch-Xen-branch.build/../gnumach-1-branch-Xen-branch/kern/debug.c:105
+    Assert
+    ??:0
+    device_write
+    /home/tschwinge/tmp/gnumach/gnumach-1-branch-Xen-branch.build/../gnumach-1-branch-Xen-branch/xen/block.c:537
+    _Xdevice_write
+    /home/tschwinge/tmp/gnumach/gnumach-1-branch-Xen-branch.build/device/device.server.c:253
+    ipc_kobject_server
+    /home/tschwinge/tmp/gnumach/gnumach-1-branch-Xen-branch.build/../gnumach-1-branch-Xen-branch/kern/ipc_kobject.c:201
+    mach_msg_trap
+    /home/tschwinge/tmp/gnumach/gnumach-1-branch-Xen-branch.build/../gnumach-1-branch-Xen-branch/ipc/mach_msg.c:1367
+    mach_call_call
+    /home/tschwinge/tmp/gnumach/gnumach-1-branch-Xen-branch.build/../gnumach-1-branch-Xen-branch/i386/i386/locore.S:1083