From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-nvdimm@lists.01.org, Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org,
linux-mm@kvack.org, Ingo Molnar <mingo@redhat.com>,
linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org,
hch@lst.de
Subject: Re: [PATCH 15/15] wait_bit: introduce {wait_on,wake_up}_devmap_idle
Date: Fri, 10 Nov 2017 10:09:18 +0100 [thread overview]
Message-ID: <20171110090918.GF4895@lst.de> (raw)
In-Reply-To: <150949217671.24061.13258957060358089669.stgit@dwillia2-desk3.amr.corp.intel.com>
On Tue, Oct 31, 2017 at 04:22:56PM -0700, Dan Williams wrote:
> Add hashed waitqueue infrastructure to wait for ZONE_DEVICE pages to
> drop their reference counts and be considered idle for DMA. This
> facility will be used for filesystem callbacks / wakeups when DMA to a
> DAX mapped range of a file ends.
>
> For now, this implementation does not have functional behavior change
> outside of waking waitqueues that do not have any waiters present.
Hmm. What is the point of the patch then?
You also probably want to split this into one well documented patch
that changes the bit wait infrastructure and another one using it.
prev parent reply other threads:[~2017-11-10 9:09 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-31 23:21 [PATCH 00/15] dax: prep work for fixing dax-dma vs truncate collisions Dan Williams
2017-10-31 23:21 ` [PATCH 01/15] dax: quiet bdev_dax_supported() Dan Williams
2017-11-02 20:11 ` Christoph Hellwig
2017-10-31 23:21 ` [PATCH 02/15] mm, dax: introduce pfn_t_special() Dan Williams
2017-11-03 2:32 ` Michael Ellerman
2017-10-31 23:21 ` [PATCH 03/15] dax: require 'struct page' by default for filesystem dax Dan Williams
2017-10-31 23:21 ` [PATCH 04/15] brd: remove dax support Dan Williams
2017-11-02 20:12 ` Christoph Hellwig
2017-11-04 16:31 ` Jens Axboe
2017-10-31 23:22 ` [PATCH 05/15] dax: stop using VM_MIXEDMAP for dax Dan Williams
2017-10-31 23:22 ` [PATCH 06/15] dax: stop using VM_HUGEPAGE " Dan Williams
2017-10-31 23:22 ` [PATCH 07/15] dax: stop requiring a live device for dax_flush() Dan Williams
2017-11-02 20:12 ` Christoph Hellwig
2017-10-31 23:22 ` [PATCH 08/15] dax: store pfns in the radix Dan Williams
2017-10-31 23:22 ` [PATCH 09/15] tools/testing/nvdimm: add 'bio_delay' mechanism Dan Williams
2017-10-31 23:22 ` [PATCH 10/15] IB/core: disable memory registration of fileystem-dax vmas Dan Williams
2017-11-02 20:13 ` Christoph Hellwig
2017-11-02 21:06 ` Dan Williams
2017-10-31 23:22 ` [PATCH 11/15] [media] v4l2: disable filesystem-dax mapping support Dan Williams
2017-10-31 23:22 ` [PATCH 12/15] mm, dax: enable filesystems to trigger page-idle callbacks Dan Williams
2017-11-10 9:04 ` Christoph Hellwig
2017-10-31 23:22 ` [PATCH 13/15] mm, devmap: introduce CONFIG_DEVMAP_MANAGED_PAGES Dan Williams
2017-11-10 9:06 ` Christoph Hellwig
2017-10-31 23:22 ` [PATCH 14/15] dax: associate mappings with inodes, and warn if dma collides with truncate Dan Williams
2017-11-10 9:08 ` Christoph Hellwig
2017-12-20 1:11 ` Dan Williams
2017-12-20 14:38 ` Jan Kara
2017-12-20 22:41 ` Dan Williams
2017-12-21 12:14 ` Jan Kara
2017-12-21 17:31 ` Dan Williams
2017-12-22 8:51 ` Jan Kara
2017-12-20 22:14 ` Dave Chinner
2017-10-31 23:22 ` [PATCH 15/15] wait_bit: introduce {wait_on,wake_up}_devmap_idle Dan Williams
2017-11-10 9:09 ` Christoph Hellwig [this message]
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