Ram disk is allocating 8x more space than required for diff data. For large RAM disk test, there is small potential for memory starvation. Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Signed-off-by: Giridhar Malavali <giridhar.malavali@xxxxxxxxxx> --- drivers/target/target_core_rd.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c index 01dda0b..6df177a 100644 --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -253,7 +253,11 @@ static int rd_build_prot_space(struct rd_dev *rd_dev, int prot_length) if (rd_dev->rd_flags & RDF_NULLIO) return 0; - total_sg_needed = rd_dev->rd_page_count / prot_length; + /* prot_length=8byte dif data + * tot sg needed = rd_page_count * (PGSZ/512) * (prot_length/PGSZ) + pad + * PGSZ canceled each other. + */ + total_sg_needed = (rd_dev->rd_page_count * prot_length / 512) +1; sg_tables = (total_sg_needed / max_sg_per_table) + 1; -- 1.8.4.GIT -- To unsubscribe from this list: 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
