diff options
| author | Justus Winter <4winter@informatik.uni-hamburg.de> | 2014-12-16 13:36:08 +0100 |
|---|---|---|
| committer | Justus Winter <4winter@informatik.uni-hamburg.de> | 2014-12-16 13:47:45 +0100 |
| commit | 73314404a9bd7106514b711cd69765b4081b6bed (patch) | |
| tree | 290cb2b64d45654bba6eb746b7feadc82fdbf785 /ipc/ipc_kmsg.h | |
| parent | 6f8e390eea2ac9aaa754e1ab2ecd73af5857f798 (diff) | |
ipc: tune size of cached kernel message buffers
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'.
Diffstat (limited to 'ipc/ipc_kmsg.h')
| -rw-r--r-- | ipc/ipc_kmsg.h | 5 |
1 files changed, 4 insertions, 1 deletions
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) \ |