From: Andrew Morton <akpm@linux-foundation.org>
To: ranxiaokai627@163.com
Cc: surenb@google.com, vbabka@suse.cz, kent.overstreet@linux.dev,
david@kernel.org, lorenzo.stoakes@oracle.com,
Liam.Howlett@oracle.com, rppt@kernel.org, mhocko@suse.com,
corbet@lwn.net, linux-mm@kvack.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, ran.xiaokai@zte.com.cn
Subject: Re: [PATCH] alloc_tag: remove sysctl prefix from mem_profiling boot parameter
Date: Sat, 10 Jan 2026 18:12:50 -0800 [thread overview]
Message-ID: <20260110181250.429195a2afa08ed61b5bbb4f@linux-foundation.org> (raw)
In-Reply-To: <20260109062419.157284-1-ranxiaokai627@163.com>
On Fri, 9 Jan 2026 06:24:19 +0000 ranxiaokai627@163.com wrote:
> From: Ran Xiaokai <ran.xiaokai@zte.com.cn>
>
> Boot parameters prefixed with "sysctl." are processed separately
> during the final stage of system initialization via kernel_init()->
> do_sysctl_args(). Since mem_profiling support should be parsed
> in early boot stage, it is unsuitable for centralized handling
> in do_sysctl_args().
> Also, when CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled,
> the sysctl.vm.mem_profiling entry is not writable and will cause
> a warning. To prevent duplicate processing of sysctl.vm.mem_profiling,
> rename the boot parameter to "mem_profiling".
Isn't this a backwardly-incompatible change? What happens to existing
steups which are using sysctl.vm.mem_profiling=?
next prev parent reply other threads:[~2026-01-11 2:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-09 6:24 ranxiaokai627
2026-01-11 2:12 ` Andrew Morton [this message]
2026-01-11 2:33 ` Kent Overstreet
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