From: Christoph Hellwig <hch@infradead.org>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: Shiyang Ruan <ruansy.fnst@fujitsu.com>,
Christoph Hellwig <hch@infradead.org>,
Dan Williams <dan.j.williams@intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-xfs <linux-xfs@vger.kernel.org>,
Linux NVDIMM <nvdimm@lists.linux.dev>,
Linux MM <linux-mm@kvack.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
david <david@fromorbit.com>, Jane Chu <jane.chu@oracle.com>
Subject: Re: [PATCH v9 02/10] dax: Introduce holder for dax_device
Date: Thu, 20 Jan 2022 23:17:32 -0800 [thread overview]
Message-ID: <YepeDLO5VNWsmV0J@infradead.org> (raw)
In-Reply-To: <20220121022200.GG13563@magnolia>
On Thu, Jan 20, 2022 at 06:22:00PM -0800, Darrick J. Wong wrote:
> Hm, so that means XFS can only support dax+pmem when there aren't
> partitions in use? Ew.
Yes. Or any sensible DAX usage going forward for that matter.
>
> > > (2) extent the holder mechanism to cover a rangeo
>
> I don't think I was around for the part where "hch balked at a notifier
> call chain" -- what were the objections there, specifically? I would
> hope that pmem problems would be infrequent enough that the locking
> contention (or rcu expiration) wouldn't be an issue...?
notifiers are a nightmare untype API leading to tons of boilerplate
code. Open coding the notification is almost always a better idea.
next prev parent reply other threads:[~2022-01-21 7:17 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-26 14:34 [PATCH v9 00/10] fsdax: introduce fs query to support reflink Shiyang Ruan
2021-12-26 14:34 ` [PATCH v9 01/10] dax: Use percpu rwsem for dax_{read,write}_lock() Shiyang Ruan
2022-01-04 22:44 ` Dan Williams
2022-01-05 17:45 ` Darrick J. Wong
2022-01-06 11:06 ` Shiyang Ruan
2021-12-26 14:34 ` [PATCH v9 02/10] dax: Introduce holder for dax_device Shiyang Ruan
2022-01-05 18:12 ` Darrick J. Wong
2022-01-05 18:23 ` Dan Williams
2022-01-05 18:56 ` Darrick J. Wong
2022-01-05 19:20 ` Dan Williams
2022-01-05 22:47 ` Darrick J. Wong
2022-01-05 23:01 ` Dan Williams
2022-01-05 23:54 ` Darrick J. Wong
2022-01-06 0:12 ` Dan Williams
2022-01-20 8:46 ` Christoph Hellwig
2022-01-21 1:26 ` Shiyang Ruan
2022-01-21 2:22 ` Darrick J. Wong
2022-01-21 7:17 ` Christoph Hellwig [this message]
2022-02-15 21:51 ` Dan Williams
2021-12-26 14:34 ` [PATCH v9 03/10] mm: factor helpers for memory_failure_dev_pagemap Shiyang Ruan
2021-12-26 14:34 ` [PATCH v9 04/10] pagemap,pmem: Introduce ->memory_failure() Shiyang Ruan
2022-01-05 19:06 ` Darrick J. Wong
2021-12-26 14:34 ` [PATCH v9 05/10] fsdax: fix function description Shiyang Ruan
2022-01-05 17:50 ` Darrick J. Wong
2022-01-20 8:47 ` Christoph Hellwig
2021-12-26 14:34 ` [PATCH v9 06/10] fsdax: Introduce dax_lock_mapping_entry() Shiyang Ruan
2022-01-04 22:55 ` Dan Williams
2021-12-26 14:34 ` [PATCH v9 07/10] mm: move pgoff_address() to vma_pgoff_address() Shiyang Ruan
2022-01-20 8:47 ` Christoph Hellwig
2021-12-26 14:34 ` [PATCH v9 08/10] mm: Introduce mf_dax_kill_procs() for fsdax case Shiyang Ruan
2022-01-20 8:55 ` Christoph Hellwig
2021-12-26 14:34 ` [PATCH v9 09/10] xfs: Implement ->notify_failure() for XFS Shiyang Ruan
2022-01-05 18:53 ` Darrick J. Wong
2022-01-05 21:17 ` Dan Williams
2021-12-26 14:34 ` [PATCH v9 10/10] fsdax: set a CoW flag when associate reflink mappings Shiyang Ruan
2022-01-20 8:59 ` Christoph Hellwig
2022-01-21 2:33 ` Shiyang Ruan
2022-01-21 7:16 ` Christoph Hellwig
2022-01-21 8:34 ` Shiyang Ruan
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