vm_page_fault on less -f /dev/acpi/namespace exit

[michael.weirauch]

Just hit 'q' and it gets us to KDL.

[michael.weirauch]

forgot: hrev30851; gcc4; ata-bm; acpi

[tqh]

This might be fixed by recent ACPI changes. Retry and let us know.

[michael.weirauch]

hrev33299-trunk-gcc4

Still persistent when exiting less prematurely with 'q'. It does not happen when "iterating" till EOF. See attachment.

Btw, how can I change my own tickets subject and description? I've seen many people do so, can't seem to find a way doing it on my own, though...

[tqh]

This is a driver issue. The code currently 'kill_thread' and then destroy the common ring_buffer. The thread used the Monthy Python phrase "I'm not dead yet" and tried to lock the ring_buffer anyway. (Btw, kill_thread is just supposed to signal the thread right, otherwise it's a bug in kill_thread)

Switched it around to

• delete the ring_buffers semaphore to signal it's time to end
• graceful exit in the thread upon deletion of the sem
• waiting for thread to die before cleanup

[tqh]

Forgot that ordinary linebreaks don't do anything.
Switched it around to

• delete the ring_buffers semaphore to signal it's time to end
  
• graceful exit in the thread upon deletion of the sem
  
• waiting for thread to die before cleanup

[axeld]

You might want to add a space before the asterisk, as that will trigger Trac's list mode.

Besides that, kill_thread() should be non-functional for kernel threads, other than waking them up when they are sleeping/suspended.

[tqh]

Should be fixed in hrev33795. Reopen if not.