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| author | Anssi Hannula <anssi.hannula@bitwise.fi> | 2022-02-22 17:14:00 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-15 15:14:49 +0300 |
| commit | 8f9b600d00f79b6ecaccbb1cf834cc40f56e0454 (patch) | |
| tree | 9d400d1d0c23807d8c2cc260d43921a473523fc0 /drivers/hv | |
| parent | e870c26f1f08b2940f5bdf63f2931308cd3c71cc (diff) | |
| download | linux-8f9b600d00f79b6ecaccbb1cf834cc40f56e0454.tar.xz | |
hv_balloon: rate-limit "Unhandled message" warning
[ Upstream commit 1d7286729aa616772be334eb908e11f527e1e291 ]
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 <anssi.hannula@bitwise.fi>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20220222141400.98160-1-anssi.hannula@bitwise.fi
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/hv_balloon.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index e5fc719a34e7..d442a8d2332e 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1548,7 +1548,7 @@ 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); } } |