Messages in this thread Patch in this message | | | From | Arnd Bergmann <> | Subject | [PATCH] RDMA/core: reduce IB_POLL_BATCH constant | Date | Tue, 20 Feb 2018 21:59:09 +0100 |
| |
The ib_wc structure has grown to much that putting 16 of them on the stack hits the warning limit for dangerous kernel stack consumption:
drivers/infiniband/core/cq.c: In function 'ib_process_cq_direct': drivers/infiniband/core/cq.c:78:1: error: the frame size of 1032 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
Using half that number brings us comfortably below that limit again.
Fixes: 02d8883f520e ("RDMA/restrack: Add general infrastructure to track RDMA resources") Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- drivers/infiniband/core/cq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/cq.c b/drivers/infiniband/core/cq.c index bc79ca8215d7..2626adbb978e 100644 --- a/drivers/infiniband/core/cq.c +++ b/drivers/infiniband/core/cq.c @@ -16,7 +16,7 @@ #include <rdma/ib_verbs.h> /* # of WCs to poll for with a single call to ib_poll_cq */ -#define IB_POLL_BATCH 16 +#define IB_POLL_BATCH 8 /* # of WCs to iterate over before yielding */ #define IB_POLL_BUDGET_IRQ 256 -- 2.9.0
| |