scsi_init_io calls scsi_alloc_sgtable and then calls blk_rq_map_sg to initialize the scatterlist structure. blk_rq_map_sg() already memset the structure for every new segment. That makes the memset in scsi_alloc_sgtable unnecessary. Patch to delete the extra memset in scsi_alloc_sgtable. Tested on a x86_64 machine. Looks stable to me. Signed-off-by: Ken Chen <kenneth.w.chen@xxxxxxxxx> --- linux-2.6.12/drivers/scsi/scsi_lib.c.orig 2005-07-12 16:34:46.051647933 -0700 +++ linux-2.6.12/drivers/scsi/scsi_lib.c 2005-07-12 16:37:10.601450849 -0700 @@ -615,8 +615,6 @@ static struct scatterlist *scsi_alloc_sg sgp = scsi_sg_pools + cmd->sglist_len; sgl = mempool_alloc(sgp->pool, gfp_mask); - if (sgl) - memset(sgl, 0, sgp->size); return sgl; } - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
