Oops while mounting a DVD-ROM
A message that is not in the archive (sent off-list or not yet received): [email protected]/
http://bugzilla.kernel.org/show_bug.cgi?id=11732
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CC| |[email protected] AssignedTo|io_other@kernel- |[email protected] |bugs.osdl.org | Component|Other |IDE Regression|0 |1
------- Comment #1 from [email protected] 2008-10-10 12:17 ------- I recategorised this to IDE.
I assume it is a regression also. It might be that we just added more debug stuff and the problme has been there for some time.
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[email protected] changed:
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Component|IDE |x86-64
Product|IO/Storage |Platform Specific/HardwareSignature · 3 lines
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AssignedTo|[email protected] |platform_x86_64@kernel- | |bugs.osdl.org
------- Comment #2 from [email protected] 2008-10-10 12:32 ------- Not idea - trace is a completely gaga mmu mapping failure. I'd say its a bust box or someone has loaded corrupting modules
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------- Comment #6 from [email protected] 2008-10-15 16:01 -------
Quoted 2 lines
IDE gets arguments for
dma_map_sg()fromblk_rq_map_sg()so everything should be sweet...
Adding Jens to the mix :)
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------- Comment #7 from [email protected] 2008-10-16 02:08 ------- Initially it looks like IDE calling dma mapping for a request with no data attached. blk_rq_map_sg() returns 0 if no data is attached, it has no error case. So saying that IDE just passes that on to dma mapping doesn't say a whole lot. To be sure, it would be interesting to catch a blktrace of this happening so we can see more closely. So, IOW, do:
1) In one termimal, run blktrace /dev/hdX (eg /dev/hda, or whatever is your cdrom).
2) In another terminal, mount the drive or whatever reproduces the error.
3) In that first terminal, ctrl-c blktrace. Then run blkparse hdX -o output and attach output to this bug.
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------- Comment #8 from [email protected] 2008-10-16 04:35 ------- Created an attachment (id=18337)
--> (http://bugzilla.kernel.org/attachment.cgi?id=18337&action=view)
blkparse output
New info:
- Still happens with -rc9 (will try with vanilla 27 within next few days)
- Doesn't happen with 2.6.26
- Happens only with one drive (out of two tested, so it could be hw problem)
- Doesn't happen always, seem random but usually 2-3 times out of ten mounts
- It seems that it happens only when hal is running
blkparse output attached (more then one (u)mount)
Regards!
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------- Comment #9 from [email protected] 2008-11-09 08:15 ------- Could you try 2.6.28-rc3? We've fixed some bugs related to ide-cd recently so this problem may get fixed as well.
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