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(parent: d80312d) | patch
md/raid1: skip data copy for behind io for discard request
authorShaohua Li <shli@fb.com>
Fri, 24 Mar 2017 22:20:47 +0000 (15:20 -0700)
committerShaohua Li <shli@fb.com>
Sat, 25 Mar 2017 16:38:06 +0000 (09:38 -0700)
commite32210327343f1cff1a32d06851bd66dc1e83638
tree2e4c01da3f7cda8e5903dcc9e786e0bbc284261ftree | snapshot
parentd80312d2df10f3554df7d101d482e15d1058e0abcommit | diff
md/raid1: skip data copy for behind io for discard request

discard request doesn't have data attached, so it's meaningless to
allocate memory and copy from original bio for behind IO. And the copy
is bogus because bio_copy_data_partial can't handle discard request.

We don't support writesame/writezeros request so far.

Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Shaohua Li <shli@fb.com>
drivers/md/raid1.c diff | blob | history
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