Hi,
I am running VirtualBox on RELENG_10 as the hypervisor with a RELENG10
guest. I noticed, that when a do a lot of disk IO in the guest where
the hypervisor cannot keep up, this start to go "bad" in the guest.
If I use the non default AHCI driver, the OS at least can kind of
recover. Using the default IDE drivers (non SATA , things panic quickly.)
Is there a way to make the guest OS "slow down" on how fast it can write
out things to avoid it going into an error state as below ?
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 215, size: 8192
ahcich0: Timeout on slot 14 port 0
ahcich0: is 00000000 cs 00000000 ss 00004000 rs 00004000 tfd 50 serr
00000000 cmd 1000ce17
(ada0:ahcich0:0:0:0): READ_FPDMA_QUEUED. ACB: 60 10 e0 0a 00 40 00 00 00
00 00 00
(ada0:ahcich0:0:0:0): CAM status: Command timeout
(ada0:ahcich0:0:0:0): Retrying command
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 215, size: 8192
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 215, size: 8192
ahcich0: Timeout on slot 14 port 0
ahcich0: is 00000000 cs 00000000 ss 00004000 rs 00004000 tfd 50 serr
00000000 cmd 1000ce17
(ada0:ahcich0:0:0:0): READ_FPDMA_QUEUED. ACB: 60 10 e0 0a 00 40 00 00 00
00 00 00
(ada0:ahcich0:0:0:0): CAM status: Command timeout
(ada0:ahcich0:0:0:0): Retrying command
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 215, size: 8192
ahcich0: Timeout on slot 14 port 0
ahcich0: is 00000000 cs 00000000 ss 00004000 rs 00004000 tfd 50 serr
00000000 cmd 1000ce17
(ada0:ahcich0:0:0:0): READ_FPDMA_QUEUED. ACB: 60 10 e0 0a 00 40 00 00 00
00 00 00
(ada0:ahcich0:0:0:0): CAM status: Command timeout
(ada0:ahcich0:0:0:0): Retrying command
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 215, size: 8192
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 215, size: 8192
ahcich0: Timeout on slot 14 port 0
ahcich0: is 00000000 cs 00000000 ss 00004000 rs 00004000 tfd 50 serr
00000000 cmd 1000ce17
(ada0:ahcich0:0:0:0): READ_FPDMA_QUEUED. ACB: 60 10 e0 0a 00 40 00 00 00
00 00 00
(ada0:ahcich0:0:0:0): CAM status: Command timeout
(ada0:ahcich0:0:0:0): Retrying command
--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, m...@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
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