linux-kernel - Re: [PATCH 1/2] f2fs: register inodes which is able to donate pages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <Z4oNGYJrN-XGX87M@infradead.org>
Date: Thu, 16 Jan 2025 23:56:09 -0800
From: Christoph Hellwig <hch@...radead.org>
To: Jaegeuk Kim <jaegeuk@...nel.org>
Cc: Christoph Hellwig <hch@...radead.org>, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	Al Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>,
	Christian Brauner <brauner@...nel.org>,
	linux-fsdevel@...r.kernel.org, linux-api@...r.kernel.org,
	linux-man@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 1/2] f2fs: register inodes which is able to donate pages

On Thu, Jan 16, 2025 at 05:19:24PM +0000, Jaegeuk Kim wrote:
> > mean a invalidate_inode_pages2_range.  Which is a strange use of the
> > word.  what are the use cases?  Why is this queued up to a thread and
> > not done inline?  Why is this in f2fs and not in common code.
> 
> The idea is let apps register some file ranges for page donation and admin
> recliam such pages all togehter if they expect to see memory pressure soon.
> We can rely on LRU, but this is more user-given trigger. I'm not sure whether
> there's a need in general, hence, wanted to put it in f2fs first to get more
> concrete use-cases beyond this Android case.

Well, that's certainly not a file system feature.  Please build this
as generic infrastucture and send it to the linux-mm list.