commit c757ec95c22036b1cb85c56ede368bf8f6c08658
author Song Liu <songliubraving@fb.com> Thu Nov 17 15:24:36 2016 -0800
committer Shaohua Li <shli@fb.com> Fri Nov 18 13:24:46 2016 -0800
tree f4299c7fa030de0d85bc2d1b3ee42706a3e5215a
parent 504634f60f463e73e7d58c6810a04437da942dba

md/r5cache: Check array size in r5l_init_log

Currently, r5l_write_stripe checks meta size for each stripe write,
which is not necessary.

With this patch, r5l_init_log checks maximal meta size of the array,
which is (r5l_meta_block + raid_disks x r5l_payload_data_parity).
If this is too big to fit in one page, r5l_init_log aborts.

With current meta data, r5l_log support raid_disks up to 203.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>