Hi Arnd Bergmann, > -----Original Message----- > From: [email protected] [mailto:linux-rdma- > [email protected]] On Behalf Of Arnd Bergmann > Sent: Tuesday, February 20, 2018 2:59 PM > To: Doug Ledford <[email protected]>; Jason Gunthorpe <[email protected]> > Cc: Arnd Bergmann <[email protected]>; Leon Romanovsky > <[email protected]>; Sagi Grimberg <[email protected]>; Bart Van Assche > <[email protected]>; [email protected]; linux- > [email protected] > Subject: [PATCH] RDMA/core: reduce IB_POLL_BATCH constant > > 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")
It is not clear to me how above commit 02d8883f520e introduced this stack issue. Bodong and I came across ib_wc size increase in [1] and it was fixed in [2]. Did you hit this error after/before applying patch [2]? [1] https://www.spinics.net/lists/linux-rdma/msg50754.html [2] https://patchwork.kernel.org/patch/10159623/
