New: Polling of IDE CD status can make machine unresponsive
http://bugzilla.kernel.org/show_bug.cgi?id=11497
Summary: Polling of IDE CD status can make machine unresponsive
Product: IO/Storage
Version: 2.5
KernelVersion: 2.6.27-rc5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: IDE
AssignedTo: [email protected]
ReportedBy: [email protected]Whenever a device handled by ide-cd is opened, the driver polls the device status for up to 5 seconds waiting for a good status value. Since this is done in the open operation, it is holding the BKL all this time. For unknown reasons (possibly another driver bug) the DVD-ROM drives in some machines here can get into a state where they always return status 0xd0 and ide-cd always polls for the full 5 seconds.
hal-storage-daemon appears to open CD-ROM devices every 5 seconds, with the result that in this state all other operations requiring the BKL can only run at 5 second intervals. This is possibly bad behaviour on HAL's part, but the driver also seems to be at fault in holding the BKL for so long.
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[Bug 11497] Polling of IDE CD status can make machine unresponsive
http://bugzilla.kernel.org/show_bug.cgi?id=11497
[email protected] changed:
What |Removed |Added
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CC| |[email protected] AssignedTo|[email protected] |[email protected] Status|NEW |ASSIGNED
------- Comment #1 from [email protected] 2008-09-05 06:19 ------- Hi,
can you send me your boot log and the correct syslog with the exact error messages you see and also your kernel .config. Also, ide-cd doesn't take the BKL in its code so it has to be somewhere in layers above it. It will be most helpful, of course, if you could bisect it :).
P.S. Same goes for bug 11498, please send me the syslog output and .config files.
Thanks!
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