Messages in this thread | | | Date | Sat, 20 Sep 2008 19:55:10 -0400 | From | Tejun Heo <> | Subject | Re: [PATCH 2/2 v4] libata: Implement disk shock protection support |
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Elias Oltmanns wrote: > On user request (through sysfs), the IDLE IMMEDIATE command with UNLOAD > FEATURE as specified in ATA-7 is issued to the device and processing of > the request queue is stopped thereafter until the specified timeout > expires or user space asks to resume normal operation. This is supposed > to prevent the heads of a hard drive from accidentally crashing onto the > platter when a heavy shock is anticipated (like a falling laptop > expected to hit the floor). In fact, the whole port stops processing > commands until the timeout has expired in order to avoid any resets due > to failed commands on another device. > > Signed-off-by: Elias Oltmanns <eo@nebensachen.de>
Acked-by: Tejun Heo <tj@kernel.org>
As for completion, yes, I think it would be nice to update complete such that multiple complete_all() calls don't overflow and completion can be used for this type of usage. Anyways, that's for another day I guess.
Thanks.
-- tejun
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