forked from Minki/linux
md: unplug writes to external bitmaps.
When writing to an 'external' bitmap we don't currently unplug the device before waiting, so we can get a 3msec delay each time; So use REQ_UNPLUG to force and unplug. Signed-off-by: NeilBrown <neilb@suse.de>
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@ -343,7 +343,7 @@ static void write_page(struct bitmap *bitmap, struct page *page, int wait)
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atomic_inc(&bitmap->pending_writes);
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set_buffer_locked(bh);
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set_buffer_mapped(bh);
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submit_bh(WRITE, bh);
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submit_bh(WRITE | REQ_UNPLUG | REQ_SYNC, bh);
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bh = bh->b_this_page;
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}
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