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Commit 4ad8d6ea authored by Dinesh K Garg's avatar Dinesh K Garg
Browse files

md: dm-req-crypt: Increase mempool size for dm-req-crypt data 



DM layer allocates pool size of 256 for request based module while
dm-req-crypt internally allocates pool for minimum 16 requests.
Increasing pool size of dm-req-crypt to be consistent with DM layer.
Also, changing GFP mask for allocation from pool, depending upon
whether call is made from atomic context or not.

Change-Id: I9dfeb46520e0d1b1fc6f850a007fce35bdc60d35
Signed-off-by: default avatarDinesh K Garg <dineshg@codeaurora.org>
parent db9b80a5

drivers/md/dm-req-crypt.c

+8 −3
Original line number Diff line number Diff line 
/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.

/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.
@@ -40,7 +40,7 @@ 
#define MAX_SG_LIST	1024

#define REQ_DM_512_KB (512*1024)

#define MAX_ENCRYPTION_BUFFERS 1

#define MIN_IOS 16

#define MIN_IOS 256

#define MIN_POOL_PAGES 32

#define KEY_SIZE_XTS 32

#define AES_XTS_IV_LEN 16
@@ -912,10 +912,15 @@ static int req_crypt_map(struct dm_target *ti, struct request *clone, 
	struct req_dm_crypt_io *req_io = NULL;

	int error = DM_REQ_CRYPT_ERROR, copy_bio_sector_to_req = 0;

	struct bio *bio_src = NULL;

	gfp_t gfp_flag = GFP_KERNEL;



	req_io = mempool_alloc(req_io_pool, GFP_NOWAIT);

	if (in_interrupt() || irqs_disabled())

		gfp_flag = GFP_NOWAIT;



	req_io = mempool_alloc(req_io_pool, gfp_flag);

	if (!req_io) {

		DMERR("%s req_io allocation failed\n", __func__);

		BUG();

		error = DM_REQ_CRYPT_ERROR;

		goto submit_request;

	}