diff options
| -rw-r--r-- | drivers/block/cciss.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 62b6c2cc80b5..d2d95ff5353b 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -4258,6 +4258,13 @@ static void cciss_find_board_params(ctlr_info_t *h) h->nr_cmds = h->max_commands - 4 - cciss_tape_cmds; h->maxsgentries = readl(&(h->cfgtable->MaxSGElements)); /* + * The P600 may exhibit poor performnace under some workloads + * if we use the value in the configuration table. Limit this + * controller to MAXSGENTRIES (32) instead. + */ + if (h->board_id == 0x3225103C) + h->maxsgentries = MAXSGENTRIES; + /* * Limit in-command s/g elements to 32 save dma'able memory. * Howvever spec says if 0, use 31 */ |