Messages in this thread | | | Date | Wed, 17 Jun 2009 18:19:38 +0900 | From | Tejun Heo <> | Subject | Re: [PATCH block#for-2.6.31] block: add request clone interface |
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Hello, Boaz.
Boaz Harrosh wrote: > dst->buffer is always NULL in my path so I don't know > what that is. Tejun?
Sorry about late reply.
It points to the head of the data buffer (bio) if the address is in addressable range (actually gets bogus value if not) and is used mostly by PIO-only drivers. It's set in blk_rq_bio_prep(), gets updated on merge and partial request completion.
Thanks.
-- tejun
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