tree e15fc4d8af0045a3947e3a25844773c6ee50289a
parent 0b8c9de05c2a860fe6b02fedcb48763bcee648b3
author NeilBrown <neilb@suse.de> 1152531856 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1152563056 -0700

[PATCH] md: fix resync speed calculation for restarted resyncs

We introduced 'io_sectors' recently so we could count the sectors that causes
io during resync separate from sectors which didn't cause IO - there can be a
difference if a bitmap is being used to accelerate resync.

However when a speed is reported, we find the number of sectors processed
recently by subtracting an oldish io_sectors count from a current
'curr_resync' count.  This is wrong because curr_resync counts all sectors,
not just io sectors.

So, add a field to mddev to store the curren io_sectors separately from
curr_resync, and use that in the calculations.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>