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Commit 86093aaf authored by Boaz Harrosh's avatar Boaz Harrosh
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exofs: convert io_state to use pages array instead of bio at input



* inode.c operations are full-pages based, and not actually
  true scatter-gather
* Lets us use more pages at once upto 512 (from 249) in 64 bit
* Brings us much much closer to be able to use exofs's io_state engine
  from objlayout driver. (Once I decide where to put the common code)

After RAID0 patch the outer (input) bio was never used as a bio, but
was simply a page carrier into the raid engine. Even in the simple
mirror/single-dev arrangement pages info was copied into a second bio.
It is now easer to just pass a pages array into the io_state and prepare
bio(s) once.

Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
parent 5d952b83
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