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Commit 8bf223c2 authored by Ming Lei's avatar Ming Lei Committed by Jens Axboe
Browse files

block: drbd: avoid to use BIO_MAX_SIZE 



Use BIO_MAX_PAGES instead and we will remove BIO_MAX_SIZE.

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarMing Lei <ming.lei@canonical.com>
Tested-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 30ac4607

drivers/block/drbd/drbd_int.h

+2 −2
Original line number Diff line number Diff line
@@ -1327,14 +1327,14 @@ struct bm_extent { 
#endif

#endif



/* BIO_MAX_SIZE is 256 * PAGE_SIZE,

/* Estimate max bio size as 256 * PAGE_SIZE,

 * so for typical PAGE_SIZE of 4k, that is (1<<20) Byte.

 * Since we may live in a mixed-platform cluster,

 * we limit us to a platform agnostic constant here for now.

 * A followup commit may allow even bigger BIO sizes,

 * once we thought that through. */

#define DRBD_MAX_BIO_SIZE (1U << 20)

#if DRBD_MAX_BIO_SIZE > BIO_MAX_SIZE

#if DRBD_MAX_BIO_SIZE > (BIO_MAX_PAGES << PAGE_SHIFT)

#error Architecture not supported: DRBD_MAX_BIO_SIZE > BIO_MAX_SIZE

#endif

#define DRBD_MAX_BIO_SIZE_SAFE (1U << 12)       /* Works always = 4k */