md/r5cache: Check array size in r5l_init_log

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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>

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Song Liu 2016-11-17 15:24:36 -08:00 • committed by Shaohua Li

parent 504634f60f

commit c757ec95c2

1 changed files with 16 additions and 10 deletions

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drivers/md/raid5-cache.c

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