From: Jaegeuk Kim <jaegeuk@kernel.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-kernel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 0/2 v6] add ioctl/sysfs to donate file-backed pages
Date: Fri, 17 Jan 2025 20:37:05 +0000 [thread overview]
Message-ID: <Z4q_cd5qNRjqSG8i@google.com> (raw)
In-Reply-To: <Z4qpurL9YeCHk5v2@casper.infradead.org>
On 01/17, Matthew Wilcox wrote:
> On Fri, Jan 17, 2025 at 06:48:55PM +0000, Jaegeuk Kim wrote:
> > > I don't understand how this is different from MADV_COLD. Please
> > > explain.
> >
> > MADV_COLD is a vma range, while this is a file range. So, it's more close to
> > fadvise(POSIX_FADV_DONTNEED) which tries to reclaim the file-backed pages
> > at the time when it's called. The idea is to keep the hints only, and try to
> > reclaim all later when admin expects system memory pressure soon.
>
> So you're saying you want POSIX_FADV_COLD?
Yeah, the intention looks similar like marking it cold and paging out later.
next prev parent reply other threads:[~2025-01-17 20:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-17 16:41 Jaegeuk Kim
2025-01-17 18:05 ` Matthew Wilcox
2025-01-17 18:48 ` Jaegeuk Kim
2025-01-17 19:04 ` Matthew Wilcox
2025-01-17 20:37 ` Jaegeuk Kim [this message]
2025-02-04 16:29 ` Jaegeuk Kim
2025-02-10 17:00 ` Jaegeuk Kim
2025-02-10 17:20 ` Matthew Wilcox
2025-02-10 19:01 ` Jaegeuk Kim
2025-02-12 0:39 ` Jaegeuk Kim
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