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(parent: 504634f) | patch
md/r5cache: Check array size in r5l_init_log
authorSong Liu <songliubraving@fb.com>
Thu, 17 Nov 2016 23:24:36 +0000 (15:24 -0800)
committerShaohua Li <shli@fb.com>
Fri, 18 Nov 2016 21:24:46 +0000 (13:24 -0800)
commitc757ec95c22036b1cb85c56ede368bf8f6c08658
treef4299c7fa030de0d85bc2d1b3ee42706a3e5215atree | snapshot (tar.gz zip)
parent504634f60f463e73e7d58c6810a04437da942dbacommit | diff
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>
drivers/md/raid5-cache.c diff | blob | blame | history