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Andrew Morton authored
From: NeilBrown <neilb@cse.unsw.edu.au> Currently raid1 uses PAGE_SIZE read/write requests for resync, as it doesn't know how to honour per-device restrictions. This patch uses to bio_add_page to honour those restrictions and ups the limit on request size to 64K. This has a measurable impact on rebuild speed (25M/s -> 60M/s)
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