* [RFC] eal: increase maximum number of file descriptors in MP message
@ 2024-02-20 23:09 Stephen Hemminger
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From: Stephen Hemminger @ 2024-02-20 23:09 UTC (permalink / raw
To: dev; +Cc: Stephen Hemminger
The TAP (and XDP) driver need to pass a file descriptor per queue
to/from secondary process. The current limit is too low and ends
up limiting these drivers to 7 queues.
Increase the limit to what the unix domain socket allows.
The Linux kernel allows up to SCM_MAX_FD (253).
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
lib/eal/include/rte_eal.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/eal/include/rte_eal.h b/lib/eal/include/rte_eal.h
index c2256f832e51..5fae3ebcdc21 100644
--- a/lib/eal/include/rte_eal.h
+++ b/lib/eal/include/rte_eal.h
@@ -155,7 +155,9 @@ int rte_eal_primary_proc_alive(const char *config_file_path);
*/
bool rte_mp_disable(void);
-#define RTE_MP_MAX_FD_NUM 8 /* The max amount of fds */
+#define RTE_MP_MAX_FD_NUM 253 /* The max number of fds
+ * See unix(7) SCM_MAX_FD
+ */
#define RTE_MP_MAX_NAME_LEN 64 /* The max length of action name */
#define RTE_MP_MAX_PARAM_LEN 256 /* The max length of param */
struct rte_mp_msg {
--
2.43.0
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2024-02-20 23:09 [RFC] eal: increase maximum number of file descriptors in MP message Stephen Hemminger
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