From: Christoph Hellwig <hch@infradead.org>
To: Theodore Tso <tytso@mit.edu>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>,
linux-api@vger.kernel.org, linux-kernel@vger.kernel.org,
Matthew Wilcox <willy@infradead.org>,
linux-f2fs-devel@lists.sourceforge.net,
Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
Akilesh Kailash <akailash@google.com>,
Christian Brauner <christian@brauner.io>
Subject: Re: [f2fs-dev] [PATCH v2] f2fs: another way to set large folio by remembering inode number
Date: Tue, 26 May 2026 23:31:58 -0700 [thread overview]
Message-ID: <ahaP3p1ZTBIDAuhH@infradead.org> (raw)
In-Reply-To: <psj3kr2gcze2yll5xdbvyyzxwcwhds5gh55poobpkfxrkpbgr7@ljdindismzd4>
On Tue, May 26, 2026 at 08:21:43PM -0500, Theodore Tso wrote:
> The bottom line is if it's right after device boot, there are simple
> techniques that don't require hacking up the f2fs. But in the
> demand-loaded case, calling compact_memory() is the last thing you'll
> want to do. You're better either asking the mm to allocate the 4k
> pages, or do whatever compaction it can do to just free up 2GB worth
> of folios. (Calling compact_memory() is overkill, and only makes
> sense in the context of benchmark / proof of concept demo.)
Or have a lot of clean pagecache using higher order folios that can
you can instantly reclaim?
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Theodore Tso <tytso@mit.edu>
Cc: linux-api@vger.kernel.org, linux-kernel@vger.kernel.org,
Matthew Wilcox <willy@infradead.org>,
linux-f2fs-devel@lists.sourceforge.net,
Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org, Akilesh Kailash <akailash@google.com>,
linux-fsdevel@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
Christian Brauner <christian@brauner.io>
Subject: Re: [f2fs-dev] [PATCH v2] f2fs: another way to set large folio by remembering inode number
Date: Tue, 26 May 2026 23:31:58 -0700 [thread overview]
Message-ID: <ahaP3p1ZTBIDAuhH@infradead.org> (raw)
In-Reply-To: <psj3kr2gcze2yll5xdbvyyzxwcwhds5gh55poobpkfxrkpbgr7@ljdindismzd4>
On Tue, May 26, 2026 at 08:21:43PM -0500, Theodore Tso wrote:
> The bottom line is if it's right after device boot, there are simple
> techniques that don't require hacking up the f2fs. But in the
> demand-loaded case, calling compact_memory() is the last thing you'll
> want to do. You're better either asking the mm to allocate the 4k
> pages, or do whatever compaction it can do to just free up 2GB worth
> of folios. (Calling compact_memory() is overkill, and only makes
> sense in the context of benchmark / proof of concept demo.)
Or have a lot of clean pagecache using higher order folios that can
you can instantly reclaim?
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next prev parent reply other threads:[~2026-05-27 6:31 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-09 13:45 [f2fs-dev] [PATCH] f2fs: another way to set large folio by remembering inode number Jaegeuk Kim via Linux-f2fs-devel
2026-04-09 13:45 ` Jaegeuk Kim
2026-04-10 1:16 ` [f2fs-dev] [PATCH v2] " Jaegeuk Kim via Linux-f2fs-devel
2026-04-10 1:16 ` Jaegeuk Kim
2026-04-14 8:02 ` Christoph Hellwig
2026-04-14 8:02 ` [f2fs-dev] " Christoph Hellwig
2026-04-15 16:44 ` Jaegeuk Kim
2026-04-15 16:44 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2026-04-15 17:15 ` Matthew Wilcox
2026-04-15 17:15 ` [f2fs-dev] " Matthew Wilcox
2026-04-15 22:02 ` Jaegeuk Kim
2026-04-15 22:02 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2026-04-15 23:49 ` Darrick J. Wong
2026-04-15 23:49 ` [f2fs-dev] " Darrick J. Wong via Linux-f2fs-devel
2026-04-16 1:19 ` Jaegeuk Kim
2026-04-16 1:19 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2026-05-21 8:51 ` Christoph Hellwig
2026-05-21 8:51 ` [f2fs-dev] " Christoph Hellwig
2026-05-21 15:57 ` Theodore Tso
2026-05-21 15:57 ` [f2fs-dev] " Theodore Tso
2026-05-21 17:42 ` Matthew Wilcox
2026-05-21 17:42 ` [f2fs-dev] " Matthew Wilcox
2026-05-22 3:59 ` Jaegeuk Kim
2026-05-22 3:59 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2026-05-22 12:55 ` Matthew Wilcox
2026-05-22 12:55 ` [f2fs-dev] " Matthew Wilcox
2026-05-22 14:04 ` Jaegeuk Kim
2026-05-22 14:04 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-25 5:34 ` Christoph Hellwig
2026-05-25 5:34 ` Christoph Hellwig
2026-05-26 1:21 ` Jaegeuk Kim
2026-05-26 1:21 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-26 2:31 ` Matthew Wilcox
2026-05-26 2:31 ` Matthew Wilcox
2026-05-26 3:47 ` Jaegeuk Kim
2026-05-26 3:47 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-27 6:33 ` Christoph Hellwig
2026-05-27 6:33 ` Christoph Hellwig
2026-05-27 6:26 ` Christoph Hellwig
2026-05-27 6:26 ` Christoph Hellwig
2026-05-27 15:42 ` Jaegeuk Kim
2026-05-27 15:42 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-25 5:34 ` Christoph Hellwig
2026-05-25 5:34 ` [f2fs-dev] " Christoph Hellwig
2026-05-22 3:32 ` Jaegeuk Kim
2026-05-22 3:32 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-22 3:53 ` Eric Biggers
2026-05-22 3:53 ` Eric Biggers via Linux-f2fs-devel
2026-05-22 4:02 ` Jaegeuk Kim
2026-05-22 4:02 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-22 10:01 ` Christian Brauner
2026-05-22 10:01 ` Christian Brauner via Linux-f2fs-devel
2026-05-22 14:11 ` Theodore Tso
2026-05-22 14:11 ` Theodore Tso
2026-05-22 17:08 ` Jaegeuk Kim
2026-05-22 17:08 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-22 22:41 ` Theodore Tso
2026-05-22 22:41 ` Theodore Tso
2026-05-26 1:10 ` Jaegeuk Kim
2026-05-26 1:10 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-26 2:35 ` Matthew Wilcox
2026-05-26 2:35 ` Matthew Wilcox
2026-05-26 3:34 ` Jaegeuk Kim
2026-05-26 3:34 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-26 3:35 ` Randy Dunlap
2026-05-26 3:35 ` Randy Dunlap
2026-05-26 4:12 ` Jaegeuk Kim
2026-05-26 4:12 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-26 13:42 ` Theodore Tso
2026-05-26 13:42 ` Theodore Tso
2026-05-26 16:14 ` Bart Van Assche
2026-05-26 16:14 ` Bart Van Assche via Linux-f2fs-devel
2026-05-27 6:28 ` Christoph Hellwig
2026-05-27 6:28 ` Christoph Hellwig
2026-05-27 15:59 ` Jaegeuk Kim
2026-05-27 15:59 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-29 5:36 ` Christoph Hellwig
2026-05-29 5:36 ` Christoph Hellwig
2026-05-31 0:12 ` Jaegeuk Kim
2026-05-31 0:12 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-31 5:28 ` Barry Song
2026-05-31 5:28 ` Barry Song via Linux-f2fs-devel
2026-06-01 1:52 ` Jaegeuk Kim
2026-06-01 1:52 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-26 21:52 ` Jaegeuk Kim
2026-05-26 21:52 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-27 1:21 ` Theodore Tso
2026-05-27 1:21 ` Theodore Tso
2026-05-27 2:43 ` Jaegeuk Kim
2026-05-27 2:43 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-27 3:30 ` Matthew Wilcox
2026-05-27 3:30 ` Matthew Wilcox
2026-05-27 15:39 ` Jaegeuk Kim
2026-05-27 15:39 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-27 6:31 ` Christoph Hellwig [this message]
2026-05-27 6:31 ` Christoph Hellwig
2026-05-27 1:15 ` Bart Van Assche via Linux-f2fs-devel
2026-05-27 1:15 ` Bart Van Assche
2026-05-28 19:36 ` Matthew Wilcox
2026-05-28 19:36 ` Matthew Wilcox
2026-05-31 0:35 ` Jaegeuk Kim
2026-05-31 0:35 ` Jaegeuk Kim via Linux-f2fs-devel
2026-05-25 5:37 ` Christoph Hellwig
2026-05-25 5:37 ` Christoph Hellwig
2026-05-22 9:59 ` Christian Brauner
2026-05-22 9:59 ` [f2fs-dev] " Christian Brauner via Linux-f2fs-devel
2026-04-15 16:41 ` Jaegeuk Kim
2026-04-15 16:41 ` [f2fs-dev] " Jaegeuk Kim via Linux-f2fs-devel
2026-04-17 0:58 ` Chao Yu via Linux-f2fs-devel
2026-04-17 0:58 ` Chao Yu
2026-04-17 16:54 ` Jaegeuk Kim via Linux-f2fs-devel
2026-04-17 16:54 ` Jaegeuk Kim
2026-04-18 1:08 ` Chao Yu via Linux-f2fs-devel
2026-04-18 1:08 ` Chao Yu
2026-04-18 1:11 ` Chao Yu via Linux-f2fs-devel
2026-04-18 1:11 ` Chao Yu
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