On 8/23/05, Jim Ramsay <[email protected]> wrote:
> Then I must have found an undocumented feature! I've applied this set
> of patches to a 2.6.11 kernel (with few problems) and ran into a bunch
> of "scheduling while atomic" errors when hotplugging a drive, culprit
> being probably scsi_sysfs.c where scsi_remove_device locks a mutex, or
> perhaps when it then calls class_device_unregister, which does a
> 'down_write'.
After further debugging, it appears that the problem is the debounce
timer in libata-core.c.
Timers appear to operate in an atomic context, so timers should not be
allowed to call scsi_remove_device, which eventually schedules.
Any suggestions on the best way to fix this?
--
Jim Ramsay
"Me fail English? That's unpossible!"
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