The previous limit was 256 bytes. That seems a little crummy by todays standards, and we are frequently sending bigger packets (e.g. every RPC containing a string_t on Hurd).
Use the page size for IKM_SAVED_KMSG_SIZE to make sure the page is pinned to a single processor. * ipc/ipc_kmsg.h (IKM_SAVED_KMSG_SIZE): Define to `PAGE_SIZE'. --- ipc/ipc_kmsg.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/ipc/ipc_kmsg.h b/ipc/ipc_kmsg.h index 07695fb..f06857a 100644 --- a/ipc/ipc_kmsg.h +++ b/ipc/ipc_kmsg.h @@ -92,9 +92,12 @@ extern ipc_kmsg_t ipc_kmsg_cache[NCPUS]; /* * The size of the kernel message buffers that will be cached. * IKM_SAVED_KMSG_SIZE includes overhead; IKM_SAVED_MSG_SIZE doesn't. + * + * We use the page size for IKM_SAVED_KMSG_SIZE to make sure the + * page is pinned to a single processor. */ -#define IKM_SAVED_KMSG_SIZE ((vm_size_t) 256) +#define IKM_SAVED_KMSG_SIZE PAGE_SIZE #define IKM_SAVED_MSG_SIZE ikm_less_overhead(IKM_SAVED_KMSG_SIZE) #define ikm_alloc(size) \ -- 2.1.3
