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authorBjörn Töpel <bjorn.topel@intel.com>2020-11-30 19:51:57 +0100
committerDaniel Borkmann <daniel@iogearbox.net>2020-12-01 00:09:25 +0100
commit7c951cafc0cb2e575f1d58677b95ac387ac0a5bd (patch)
tree1d47f6c2fb6e3734d52c96a1f0abcf38e2c08cf5 /fs/eventpoll.c
parentnet: Introduce preferred busy-polling (diff)
downloadlinux-7c951cafc0cb2e575f1d58677b95ac387ac0a5bd.tar.xz
linux-7c951cafc0cb2e575f1d58677b95ac387ac0a5bd.zip
net: Add SO_BUSY_POLL_BUDGET socket option
This option lets a user set a per socket NAPI budget for busy-polling. If the options is not set, it will use the default of 8. Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Link: https://lore.kernel.org/bpf/20201130185205.196029-3-bjorn.topel@gmail.com
Diffstat (limited to 'fs/eventpoll.c')
-rw-r--r--fs/eventpoll.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index e11fab3a0b9e..73c346e503d7 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -397,7 +397,8 @@ static void ep_busy_loop(struct eventpoll *ep, int nonblock)
unsigned int napi_id = READ_ONCE(ep->napi_id);
if ((napi_id >= MIN_NAPI_ID) && net_busy_loop_on())
- napi_busy_loop(napi_id, nonblock ? NULL : ep_busy_loop_end, ep, false);
+ napi_busy_loop(napi_id, nonblock ? NULL : ep_busy_loop_end, ep, false,
+ BUSY_POLL_BUDGET);
}
static inline void ep_reset_busy_poll_napi_id(struct eventpoll *ep)