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Old 04-09-2009, 03:41 AM   #1
coopci
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Registered: Apr 2009
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Does ata_exec_internal_sg sleep?


I'm comparing the sata portion of various Operating Systems. There's something I can not sure about ata_exec_internal_sg. When this function is going to use an ata port, it accquires a spin lock. This seems very different from FreeBSD and OpenSolaris since the two both spin first and then sleep. I did not find spin_lock_irqsave involvle any sleep possibility. Moreover, the comment says that this function "might sleep", does it exclusively mean wait_for_completion_timeout?
 
  


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