linux-kernel - 答复: [外部邮件] Re: [PATCH] fs: Make file-nr output the total allocated file handles

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Message-ID: <6a0a7570ff6c4994aee74b9bef6799eb@baidu.com>
Date: Sat, 12 Apr 2025 12:59:53 +0000
From: "Li,Rongqing" <lirongqing@...du.com>
To: Christian Brauner <brauner@...nel.org>
CC: "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>, "jack@...e.cz"
	<jack@...e.cz>, "linux-fsdevel@...r.kernel.org"
	<linux-fsdevel@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: 答复: [外部邮件] Re: [PATCH] fs: Make file-nr output the total allocated file handles

 
> On Thu, Apr 10, 2025 at 07:21:17PM +0800, lirongqing wrote:
> > From: Li RongQing <lirongqing@...du.com>
> >
> > Make file-nr output the total allocated file handles, not per-cpu
> > cache number, it's more precise, and not in hot path
> >
> > Signed-off-by: Li RongQing <lirongqing@...du.com>
> > ---
> 
> That means grabbing a lock suddenly. Is there an actual use-case behind this?

want to monitor it to find the leaking of the allocated file handler by some applications, but find it is inaccurate

So I think this is not a hot path,  percpu_counter_sum_positive may be able to be used

Thank
-Li