Increase mempool size from 16 to 64 entries.
When swapping to dm-crypt, all available memory is temporarily exhausted
and dm-crypt is only using the mempool reserve. Increasing mempool reserve
improves swapping performance.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Index: linux-2.6/drivers/md/dm-crypt.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-crypt.c
+++ linux-2.6/drivers/md/dm-crypt.c
@@ -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);
--
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