netdev - Re: [PATCH net-next v2 3/6] vsock/test: Add README blurb about kmemleak usage

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Message-ID: <sugkft67ys3oaqp2i3fuz5gwuwdd7a2wo6w7xpgkn274rxvdmy@pgpuek7gmbz6>
Date: Mon, 16 Dec 2024 15:33:06 +0100
From: Stefano Garzarella <sgarzare@...hat.com>
To: Michal Luczaj <mhal@...x.co>
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 3/6] vsock/test: Add README blurb about
 kmemleak usage

On Mon, Dec 16, 2024 at 01:00:59PM +0100, Michal Luczaj wrote:
>Document the suggested use of kmemleak for memory leak detection.
>
>Suggested-by: Stefano Garzarella <sgarzare@...hat.com>
>Signed-off-by: Michal Luczaj <mhal@...x.co>
>---
> tools/testing/vsock/README | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)

Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>

>
>diff --git a/tools/testing/vsock/README b/tools/testing/vsock/README
>index 84ee217ba8eed8d18eebecc4dc81088934f76d8f..680ce666ceb56db986c8ad078573d774e6fecf18 100644
>--- a/tools/testing/vsock/README
>+++ b/tools/testing/vsock/README
>@@ -36,6 +36,21 @@ Invoke test binaries in both directions as follows:
>                        --control-port=1234 \
>                        --peer-cid=3
>
>+Some tests are designed to produce kernel memory leaks. Leaks detection,
>+however, is deferred to Kernel Memory Leak Detector. It is recommended to enable
>+kmemleak (CONFIG_DEBUG_KMEMLEAK=y) and explicitly trigger a scan after each test
>+suite run, e.g.
>+
>+  # echo clear > /sys/kernel/debug/kmemleak
>+  # $TEST_BINARY ...
>+  # echo "wait for any grace periods" && sleep 2
>+  # echo scan > /sys/kernel/debug/kmemleak
>+  # echo "wait for kmemleak" && sleep 5
>+  # echo scan > /sys/kernel/debug/kmemleak
>+  # cat /sys/kernel/debug/kmemleak
>+
>+For more information see Documentation/dev-tools/kmemleak.rst.
>+
> vsock_perf utility
> -------------------
> 'vsock_perf' is a simple tool to measure vsock performance. It works in
>
>-- 
>2.47.1
>