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Message-ID: <63aed837-21ae-4bc3-b327-ad2a005e6e4f@linux.alibaba.com>
Date: Fri, 28 Jun 2024 11:32:19 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: Bang Li <libang.li@...group.com>, hughd@...gle.com,
akpm@...ux-foundation.org
Cc: david@...hat.com, ryan.roberts@....com, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/shmem: Fix input and output inconsistencies
On 2024/6/28 11:23, Bang Li wrote:
> After the commit 19eaf44954df ("mm: thp: support allocation of
> anonymous multi-size THP"), add mTHP support for anonymous shmem.
> We can configure different policies through the multi-size THP
> sysfs interface for anonymous shmem.
>
> But when we configure the "advise" policy of
> /sys/kernel/mm/transparent_hugepage/hugepages-xxxkB/shmem_enabled,
> we cannot write the "advise", but write the "madvise", which is
> unreasonable. We should keep the output and input values consistent,
> which is more convenient for users.
>
> Fixes: 61a57f1b1da9 ("mm: shmem: add multi-size THP sysfs interface for anonymous shmem")
> Signed-off-by: Bang Li <libang.li@...group.com>
Good catch. Sorry for my typo. Thanks.
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
> ---
> mm/shmem.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/shmem.c b/mm/shmem.c
> index 13d139abe69a..d495c0701a83 100644
> --- a/mm/shmem.c
> +++ b/mm/shmem.c
> @@ -4983,7 +4983,7 @@ static ssize_t thpsize_shmem_enabled_store(struct kobject *kobj,
> clear_bit(order, &huge_shmem_orders_madvise);
> set_bit(order, &huge_shmem_orders_within_size);
> spin_unlock(&huge_shmem_orders_lock);
> - } else if (sysfs_streq(buf, "madvise")) {
> + } else if (sysfs_streq(buf, "advise")) {
> spin_lock(&huge_shmem_orders_lock);
> clear_bit(order, &huge_shmem_orders_always);
> clear_bit(order, &huge_shmem_orders_inherit);
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