Commit c650b7ea authored by Changpeng Liu's avatar Changpeng Liu Committed by Konrad Sztyber
Browse files

bdev: increase metadata buffer size to 64 



Many SSD drives can support up to 64 bytes of metadata
size, so here we define a macro in bdev.h and set the
default size to 64.

Change-Id: Ie30831d61cd66b8f5904daa38101d1a77141214e
Signed-off-by: default avatarChangpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/12355


Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: default avatarKonrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: default avatarDong Yi <dongx.yi@intel.com>
Reviewed-by: default avatarAleksey Marchuk <alexeymar@nvidia.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
parent a438718f

include/spdk/bdev.h

+6 −3
Original line number Diff line number Diff line
@@ -27,11 +27,14 @@ extern "C" { 
#define SPDK_BDEV_SMALL_BUF_MAX_SIZE 8192

#define SPDK_BDEV_LARGE_BUF_MAX_SIZE (64 * 1024)



#define SPDK_BDEV_MAX_INTERLEAVED_MD_SIZE (64)



/* Increase the buffer size to store interleaved metadata.  Increment is the

 *  amount necessary to store metadata per data block.  16 byte metadata per

 *  512 byte data block is the current maximum ratio of metadata per block.

 *  amount necessary to store metadata per data block.  SPDK_BDEV_MAX_INTERLEAVED_MD_SIZE

 *  bytes metadata per 512 byte data block is the current maximum ratio of

 *  metadata per block.

 */

#define SPDK_BDEV_BUF_SIZE_WITH_MD(x)	(((x) / 512) * (512 + 16))

#define SPDK_BDEV_BUF_SIZE_WITH_MD(x)	(((x) / 512) * (512 + SPDK_BDEV_MAX_INTERLEAVED_MD_SIZE))



/** Asynchronous event type */

enum spdk_bdev_event_type {