linux-kernel - RE: 2.6.23.1 - sata_mv (7042) hang with large file operations

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Message-ID: <BD261180E6D35F4D9D32F3E44FD3D9010AAE911D@EMPBEDEX.empirix.com>
Date:	Thu, 15 Nov 2007 11:26:02 -0500
From:	"Morrison, Tom" <tmorrison@...irix.com>
To:	"Mark Lord" <liml@....ca>
Cc:	"Jeff Garzik" <jeff@...zik.org>, <linux-ide@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: RE: 2.6.23.1 - sata_mv (7042) hang with large file operations

Additional information - the ~file size this is caused 
is somewhere close to 260Mbytesfiles. 

If I create a ~260Mbytes file - my program finishes creating
the file - but ~5 seconds later (I timed this by hitting enter
on the console every second after completion of the command 
that should have done a fsync of the created file before exiting)...
It hangs...

I did a little playing around with /proc/sys/dev/scsi/logging_level
(set to 0x7) - and it seems that the kernel/box locks up after
this line:

>> scsi_add_timer: scmd: efca83c0, time: 7500, (c0160660)
>> scsi_delete_timer: scmd: efca83c0, rtn: 1
>> scsi_add_timer: scmd: efca8840, time: 7500, (c0160660)


Further analysis (setting logging level to 65535 (0xFFFF) 
Has the following behavior down low) - 

>> scsi_add_timer: scmd: efca8960, time: 7500, (c0160660)
>> sd 0:0:0:0: [sda] Send: 0xefca8960
>> sd 0:0:0:0: [sda] CDB: Write(10): 2a 00 00 47 92 27 00 01 48 00
>> buffer = 0xc0553040, bufflen = 167936, done = 0xc016b194,
queuecommand
      0xc017ed34
>> leaving scsi_dispatch_cmnd()
>> scsi_delete_timer: scmd: efca8960, rtn: 1
>> sd 0:0:0:0: [sda] Done: 0xefca8960 SUCCESS
>> sd 0:0:0:0: [sda] Result: hostbyte=DID_OK
driverbyte=DRIVER_OK,SUGGEST_OK
>> sd 0:0:0:0: [sda] CDB: Write(10): 2a 00 00 47 92 27 00 01 48 00
>> sd 0:0:0:0: [sda] scsi host busy 1 failed 0
>> sd 0:0:0:0: Notifying upper driver of completion (result 0)
>>
>> scsi_add_timer: scmd: efca82a0, time: 7500, (c0160660)
>> sd 0:0:0:0: [sda] Send: 0xefca82a0
>> sd 0:0:0:0: [sda] CDB: Write(10): 2a 00 00 47 93 6f 00 02 40 00
>> buffer = 0xef5734c0, bufflen = 294912, done = 0xc016b194,
queuecommand
      0xc017ed34
>> leaving scsi_dispatch_cmnd()

Nothing more - it hangs!

This is really a nasty problem!!!!


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