From: Christoph Hellwig <hch@infradead.org>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: Brian Foster <bfoster@redhat.com>,
linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 2/6] iomap, xfs: lift zero range hole mapping flush into xfs
Date: Fri, 7 Nov 2025 05:59:03 -0800 [thread overview]
Message-ID: <aQ37J1qqhhP2WXOX@infradead.org> (raw)
In-Reply-To: <20251106233208.GU196362@frogsfrogsfrogs>
On Thu, Nov 06, 2025 at 03:32:08PM -0800, Darrick J. Wong wrote:
> A harder question is: what would filesystems put in write_map for a pure
> read? They could leave it at the default (null mapping) and the kernel
> wouldn't pay attention to it.
Please make them entirely separate iomap_iters, and allowing nesting.
That way no write map even exists for pure reads.
next prev parent reply other threads:[~2025-11-07 13:59 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-16 19:02 [PATCH 0/6] iomap, xfs: improve zero range flushing and lookup Brian Foster
2025-10-16 19:02 ` [PATCH 1/6] iomap: replace folio_batch allocation with stack allocation Brian Foster
2025-11-05 0:07 ` Darrick J. Wong
2025-11-05 15:27 ` Brian Foster
2025-11-05 21:41 ` Darrick J. Wong
2025-11-06 15:51 ` Brian Foster
2025-11-06 15:58 ` Darrick J. Wong
2025-10-16 19:02 ` [PATCH 2/6] iomap, xfs: lift zero range hole mapping flush into xfs Brian Foster
2025-11-05 0:31 ` Darrick J. Wong
2025-11-05 15:33 ` Brian Foster
2025-11-05 22:23 ` Darrick J. Wong
2025-11-06 15:52 ` Brian Foster
2025-11-06 23:32 ` Darrick J. Wong
2025-11-07 13:52 ` Brian Foster
2025-11-07 13:59 ` Christoph Hellwig [this message]
2025-11-07 13:57 ` Christoph Hellwig
2025-11-07 13:55 ` Christoph Hellwig
2025-10-16 19:03 ` [PATCH 3/6] xfs: flush eof folio before insert range size update Brian Foster
2025-11-05 0:14 ` Darrick J. Wong
2025-11-05 15:34 ` Brian Foster
2025-11-05 22:15 ` Darrick J. Wong
2025-10-16 19:03 ` [PATCH 4/6] xfs: look up cow fork extent earlier for buffered iomap_begin Brian Foster
2025-11-05 22:26 ` Darrick J. Wong
2025-10-16 19:03 ` [PATCH 5/6] xfs: only flush when COW fork blocks overlap data fork holes Brian Foster
2025-10-16 19:03 ` [PATCH 6/6] xfs: replace zero range flush with folio batch Brian Foster
2025-11-05 22:37 ` Darrick J. Wong
2025-11-06 15:53 ` Brian Foster
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