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dm crypt: increase mempool reserve to better support swapping 

Increase mempool size from 16 to 64 entries.  This increase improves
swap on dm-crypt performance.

When swapping to dm-crypt, all available memory is temporarily exhausted
and dm-crypt can only use the mempool reserve.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka 2016-07-15 17:30:20 -04:00 committed by Mike Snitzer
parent 802934b2cf
commit 0a83df6c8c
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-crypt.c
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@ -181,7 +181,7 @@ struct crypt_config {
u8 key[0];
};
#define MIN_IOS 16
#define MIN_IOS 64
static void clone_init(struct dm_crypt_io *, struct bio *);
static void kcryptd_queue_crypt(struct dm_crypt_io *io);