From: chenweilong <chenweilong@huawei.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: <viro@zeniv.linux.org.uk>, <keescook@chromium.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [linux-next] rootfs: rootflags take effect when mount rootfs
Date: Mon, 28 Jun 2021 09:47:53 +0800 [thread overview]
Message-ID: <929b30c6-9d5e-0e57-c2a0-5c166b32dc10@huawei.com> (raw)
In-Reply-To: <YNhW/XQlZxfJR9Us@kroah.com>
On 2021/6/27 18:46, Greg KH wrote:
> On Sat, Jun 26, 2021 at 09:16:55AM +0800, Weilong Chen wrote:
>> The kernel root filesystem may use the rootflags parameters
>> when mount, especially for tmpfs, to setup a variety of features.
>>
>> For example:
>> 1. Add 'rootflags=huge=always' to boot args.
>> 2. When the OS bootup:
>> rootfs on / type rootfs (..., huge=always)
>> Then we can get the hugepage performance improvement of tmpfs.
>>
>> Signed-off-by: Weilong Chen <chenweilong@huawei.com>
>> ---
>> fs/namespace.c | 5 +++--
>> include/linux/init.h | 2 +-
>> init/do_mounts.c | 4 +++-
>> 3 files changed, 7 insertions(+), 4 deletions(-)
> No documentation update for this new user/kernel api you added?
There is already relevant documents (Documentation/admin-guide/kernel-parameters.txt)
description:
rootflags= [KNL] Set root filesystem mount option string
This patch make it work for tmpfs.
> .
prev parent reply other threads:[~2021-06-28 1:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-26 1:16 [linux-next] rootfs: rootflags take effect when mount rootfs Weilong Chen
2021-06-27 10:46 ` Greg KH
2021-06-28 1:47 ` chenweilong [this message]
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