Dear Chris Caputo,
I will do any research when I come back my lab.
You can do mkfs.ext3 /dev/sda1.
and then mount -t ext3 /dev/sda1 /mnt/sda1
test this volume as your testing procedure.
If in this case it cause same message as we met, please tell me again.
Best Regards
Erich
----- Original Message -----
From: "Chris Caputo" <[email protected]>
To: "erich" <[email protected]>
Cc: <[email protected]>; "Jens Axboe" <[email protected]>; "Andrew
Morton" <[email protected]>
Sent: Thursday, April 06, 2006 7:44 PM
Subject: Re: about ll_rw_blk.c of void generic_make_request(struct bio *bio)
On Thu, 6 Apr 2006, erich wrote:
I am so sorry that I reply this mail today.
At 2006/4/3 my mother unexpectedly got paralysis and dead.
I can not do any more "request testing" with this bug for some days.
I do dump_stack as your request and attach it.
And I do "fsck" before test this volume every time.
It appears fine when do fsck with each testing volume.
You can easily reproduce this bug from copy a 900MB file from ARECA
volume
(mkfs.ext2, mount -t ext2) to none ARECA volume.
Erich, my sincere condolences to you and your family.
With respect to this problem, is it possible with your driver that if a
transfer read request is above a certain size, data corruption occurs?
It may be that fsck passes because it is doing smaller transfers while a
file copy under ext2 (or in your example, ext3) fails because it is during
those operations that the higher max_sectors makes a difference.
Curiously, the hex values of the "want=" field in your report are as
follows:
sdb1: rw=0, want=12126966488, limit=312496317
2D2D2D2D8
sdb1: rw=0, want=12126967088, limit=312496317
2D2D2D530
sdb1: rw=0, want=22232771288, limit=312496317
52D2D2AD8
sdb1: rw=0, want=22232771888, limit=312496317
52D2D2D30
I wonder if 0x2D or 0xD2 corresponds to something on the disk such as in
the file being copied or is otherwise familiar.
Chris
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