Hi Arnd Bergmann, > -----Original Message----- > From: linux-rdma-owner@xxxxxxxxxxxxxxx [mailto:linux-rdma- > owner@xxxxxxxxxxxxxxx] On Behalf Of Arnd Bergmann > Sent: Tuesday, February 20, 2018 2:59 PM > To: Doug Ledford <dledford@xxxxxxxxxx>; Jason Gunthorpe <jgg@xxxxxxxx> > Cc: Arnd Bergmann <arnd@xxxxxxxx>; Leon Romanovsky > <leonro@xxxxxxxxxxxx>; Sagi Grimberg <sagi@xxxxxxxxxxx>; Bart Van Assche > <bart.vanassche@xxxxxxxxxxx>; linux-rdma@xxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx > 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/ -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
