From: Anssi Hannula Date: Tue, 22 Feb 2022 14:14:00 +0000 (+0200) Subject: hv_balloon: rate-limit "Unhandled message" warning X-Git-Tag: v5.18-rc1~138^2~1 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=1d7286729aa616772be334eb908e11f527e1e291;p=linux-2.6-block.git hv_balloon: rate-limit "Unhandled message" warning For a couple of times I have encountered a situation where hv_balloon: Unhandled message: type: 12447 is being flooded over 1 million times per second with various values, filling the log and consuming cycles, making debugging difficult. Add rate limiting to the message. Most other Hyper-V drivers already have similar rate limiting in their message callbacks. The cause of the floods in my case was probably fixed by 96d9d1fa5cd5 ("Drivers: hv: balloon: account for vmbus packet header in max_pkt_size"). Fixes: 9aa8b50b2b3d ("Drivers: hv: Add Hyper-V balloon driver") Signed-off-by: Anssi Hannula Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/20220222141400.98160-1-anssi.hannula@bitwise.fi Signed-off-by: Wei Liu --- diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index f2d05bff4245..439f99b8b5de 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1563,7 +1563,7 @@ static void balloon_onchannelcallback(void *context) break; default: - pr_warn("Unhandled message: type: %d\n", dm_hdr->type); + pr_warn_ratelimited("Unhandled message: type: %d\n", dm_hdr->type); } }