[Xen-devel] xen pae on 3.0.0

[Adam Heath <doogie@xxxxxxxxxxxxx>]

In a word, is it stable?

I'm seeing some odd things; segfaults by postgres in a domU, when pae is
enabled.  And, this last time, I got this on the ssh I had to the domU:

==
database:/home/shared/doogie#
Message from syslogd@database at Wed Dec 14 18:55:05 2005 ...
database kernel: [27073.874149] Bad page state at prep_new_page (in process
'postmaster', page c1326ca0)

Message from syslogd@database at Wed Dec 14 18:55:05 2005 ...
database kernel: [27073.874165] flags:0x00000068 mapping:cd26914c mapcount:0
count:2

Message from syslogd@database at Wed Dec 14 18:55:05 2005 ...
database kernel: [27073.874169] Backtrace:

Message from syslogd@database at Wed Dec 14 18:55:05 2005 ...
database kernel: [27073.874366] Trying to fix it up, but a reboot is needed
==

And the instance was no longer running.  Fortunately, it was able to log the
oops to kern.log(following):

==
Bad page state at prep_new_page (in process 'postmaster', page c1326ca0)
flags:0x00000068 mapping:cd26914c mapcount:0 count:2
Backtrace:
 [bad_page+112/176] bad_page+0x70/0xb0
 [prep_new_page+60/96] prep_new_page+0x3c/0x60
 [buffered_rmqueue+250/544] buffered_rmqueue+0xfa/0x220
 [__set_page_dirty_nobuffers+170/272] __set_page_dirty_nobuffers+0xaa/0x110
 [__alloc_pages+913/960] __alloc_pages+0x391/0x3c0
 [generic_file_buffered_write+310/1520] generic_file_buffered_write+0x136/0x5f0
 [current_fs_time+85/112] current_fs_time+0x55/0x70
 [inode_update_time+75/192] inode_update_time+0x4b/0xc0
 [__generic_file_aio_write_nolock+675/1232] 
__generic_file_aio_write_nolock+0x2a3/0x4d0
 [sys_recvfrom+233/256] sys_recvfrom+0xe9/0x100
 [__generic_file_write_nolock+145/192] __generic_file_write_nolock+0x91/0xc0
 [scheduler_tick+338/784] scheduler_tick+0x152/0x310
 [timer_interrupt+322/592] timer_interrupt+0x142/0x250
 [autoremove_wake_function+0/80] autoremove_wake_function+0x0/0x50
 [generic_file_write+58/192] generic_file_write+0x3a/0xc0
 [sys_recv+51/64] sys_recv+0x33/0x40
 [vfs_write+151/256] vfs_write+0x97/0x100
 [sys_write+71/128] sys_write+0x47/0x80
 [syscall_call+7/11] syscall_call+0x7/0xb
Trying to fix it up, but a reboot is needed
==


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