From: Jaegeuk Kim via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 0/2 v6] add ioctl/sysfs to donate file-backed pages
Date: Tue, 4 Feb 2025 16:29:38 +0000 [thread overview]
Message-ID: <Z6JAcsAOCCWp-y66@google.com> (raw)
In-Reply-To: <Z4q_cd5qNRjqSG8i@google.com>
On 01/17, Jaegeuk Kim wrote:
> 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.
Kindly ping, for the feedback on the direction. If there's demand for something
generalized api, I'm happy to explore.
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WARNING: multiple messages have this Message-ID (diff)
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: Tue, 4 Feb 2025 16:29:38 +0000 [thread overview]
Message-ID: <Z6JAcsAOCCWp-y66@google.com> (raw)
In-Reply-To: <Z4q_cd5qNRjqSG8i@google.com>
On 01/17, Jaegeuk Kim wrote:
> 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.
Kindly ping, for the feedback on the direction. If there's demand for something
generalized api, I'm happy to explore.
next prev parent reply other threads:[~2025-02-04 16:29 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-17 16:41 [f2fs-dev] [PATCH 0/2 v6] add ioctl/sysfs to donate file-backed pages Jaegeuk Kim via Linux-f2fs-devel
2025-01-17 16:41 ` Jaegeuk Kim
2025-01-17 16:41 ` [f2fs-dev] [PATCH 1/2] f2fs: register inodes which is able to donate pages Jaegeuk Kim via Linux-f2fs-devel
2025-01-17 16:41 ` Jaegeuk Kim
2025-01-21 9:22 ` [f2fs-dev] " Chao Yu via Linux-f2fs-devel
2025-01-21 9:22 ` Chao Yu
2025-01-21 16:56 ` Jaegeuk Kim via Linux-f2fs-devel
2025-01-21 16:56 ` Jaegeuk Kim
2025-01-17 16:41 ` [f2fs-dev] [PATCH 2/2] f2fs: add a sysfs entry to request donate file-backed pages Jaegeuk Kim via Linux-f2fs-devel
2025-01-17 16:41 ` Jaegeuk Kim
2025-01-17 18:05 ` [f2fs-dev] [PATCH 0/2 v6] add ioctl/sysfs to " Matthew Wilcox
2025-01-17 18:05 ` Matthew Wilcox
2025-01-17 18:48 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2025-01-17 18:48 ` Jaegeuk Kim
2025-01-17 19:04 ` [f2fs-dev] " Matthew Wilcox
2025-01-17 19:04 ` Matthew Wilcox
2025-01-17 20:37 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2025-01-17 20:37 ` Jaegeuk Kim
2025-02-04 16:29 ` Jaegeuk Kim via Linux-f2fs-devel [this message]
2025-02-04 16:29 ` Jaegeuk Kim
2025-02-10 17:00 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2025-02-10 17:00 ` Jaegeuk Kim
2025-02-10 17:20 ` [f2fs-dev] " Matthew Wilcox
2025-02-10 17:20 ` Matthew Wilcox
2025-02-10 19:01 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2025-02-10 19:01 ` Jaegeuk Kim
2025-02-12 0:39 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2025-02-12 0:39 ` Jaegeuk Kim
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