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From: Greg KH <gregkh@linuxfoundation.org>
To: zhoumin <teczm@foxmail.com>
Cc: akpm@linux-foundation.org, dakr@kernel.org,
	linux-kernel@vger.kernel.org, rafael@kernel.org,
	viro@zeniv.linux.org.uk
Subject: Re: [PATCH] kobject_uevent: add uevent_helper exist check
Date: Mon, 7 Apr 2025 09:01:54 +0200	[thread overview]
Message-ID: <2025040744-anvil-tiptop-bbdb@gregkh> (raw)
In-Reply-To: <tencent_474AC55ADEE443D037337A9ED09422D8C408@qq.com>

On Sun, Apr 06, 2025 at 02:19:15PM +0800, zhoumin wrote:
> Hi Andrew,
> 
> Thank you for your feedback.
> 
> > Is there any measurable reduction in boot time?
> 
> This depends on the number of uevent and the performance of the device. 
> In fact, I found this issue during a project to optomize boot time,
> and on my embedded device, it can be optimized by at least 2 seconds.

So you are spending 2 seconds in failing to lookup the uevent helper
path?  That feels really wrong, how long does your boot take overall?
What % is 2 seconds?

thanks,

greg k-h

  reply	other threads:[~2025-04-07  7:03 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-04 17:31 [PATCH] kobject_uevent: add uevent_helper exist check zhoumin
2025-04-05 22:52 ` Andrew Morton
2025-04-06  6:19   ` zhoumin
2025-04-07  7:01     ` Greg KH [this message]
2025-04-07  7:00 ` Greg KH
2025-04-07 15:18   ` zhoumin
2025-04-07 15:35     ` Greg KH
2025-04-07 16:22       ` zhoumin

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