linux-kernel - Re: [PATCH 2/4] selftests: memcg: Expect no low events in unprotected sibling

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Message-ID: <20220513174211.uv5yxzt5sochmwal@dev0025.ash9.facebook.com>
Date:   Fri, 13 May 2022 10:42:11 -0700
From:   David Vernet <void@...ifault.com>
To:     Michal Koutný <mkoutny@...e.com>
Cc:     akpm@...ux-foundation.org, cgroups@...r.kernel.org,
        hannes@...xchg.org, kernel-team@...com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        mhocko@...nel.org, roman.gushchin@...ux.dev, shakeelb@...gle.com,
        tj@...nel.org, Richard Palethorpe <rpalethorpe@...e.de>
Subject: Re: [PATCH 2/4] selftests: memcg: Expect no low events in
 unprotected sibling

On Fri, May 13, 2022 at 07:18:09PM +0200, Michal Koutný wrote:
> This is effectively a revert of commit cdc69458a5f3 ("cgroup: account
> for memory_recursiveprot in test_memcg_low()"). The case test_memcg_low
> will fail with memory_recursiveprot until resolved in reclaim
> code.
> However, this patch preserves the existing helpers and variables for
> later uses.
> 
> Signed-off-by: Michal Koutný <mkoutny@...e.com>
> ---
>  tools/testing/selftests/cgroup/test_memcontrol.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c
> index 4958b42201a9..eba252fa64ac 100644
> --- a/tools/testing/selftests/cgroup/test_memcontrol.c
> +++ b/tools/testing/selftests/cgroup/test_memcontrol.c
> @@ -528,7 +528,7 @@ static int test_memcg_low(const char *root)
>  	}
>  
>  	for (i = 0; i < ARRAY_SIZE(children); i++) {
> -		int no_low_events_index = has_recursiveprot ? 2 : 1;
> +		int no_low_events_index = 1;
>  
>  		oom = cg_read_key_long(children[i], "memory.events", "oom ");
>  		low = cg_read_key_long(children[i], "memory.events", "low ");
> -- 
> 2.35.3
> 

Reviewed-by: David Vernet <void@...ifault.com>