On Wed, 17 Oct 2007, Jens Axboe wrote:
>
> Ah ok, I see why you are confused. The SCSI case is one, it allocs and
> frees the sg table each time. The entries are thus always initialized
> when they end up in blk_rq_map_sg(). However, other drivers allocate one
> at driver init time and use that one all the time. It needs to be
> initially cleared, but it wont be cleared before each request mapping.
> And that is fine, as long as we do clear entries in blk_rq_map_sg().
Ahh, ok, thanks for clearing that up.
Linus
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