linux-kernel - Re: [PATCH v3 3/4] hugetlb: Fix return value of _

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Message-ID: <4fe61809-db97-adc5-ce5e-ac5bb99c84ee@oracle.com>
Date:   Thu, 14 Apr 2022 17:01:42 -0700
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Peng Liu <liupeng256@...wei.com>, david@...hat.com,
        akpm@...ux-foundation.org, yaozhenguo1@...il.com,
        baolin.wang@...ux.alibaba.com, songmuchun@...edance.com,
        liuyuntao10@...wei.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/4] hugetlb: Fix return value of __setup handlers

On 4/12/22 20:29, Peng Liu wrote:
> When __setup() return '0', using invalid option values causes the
> entire kernel boot option string to be reported as Unknown. Hugetlb
> calls __setup() and will return '0' when set invalid parameter
> string.
> 
> The following phenomenon is observed:
>  cmdline:
>   hugepagesz=1Y hugepages=1
>  dmesg:
>   HugeTLB: unsupported hugepagesz=1Y
>   HugeTLB: hugepages=1 does not follow a valid hugepagesz, ignoring
>   Unknown kernel command line parameters "hugepagesz=1Y hugepages=1"
> 
> Since hugetlb will print warning/error information before return for
> invalid parameter string, just use return '1' to avoid print again.
> 
> Signed-off-by: Peng Liu <liupeng256@...wei.com>
> ---
>  mm/hugetlb.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)

Thank you for cleaning this up!

Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>
-- 
Mike Kravetz