From: Peter Zijlstra <peterz@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
Linux API <linux-api@vger.kernel.org>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
Dave Chinner <david@fromorbit.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-xfs@vger.kernel.org,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andy Lutomirski <luto@kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v2 0/5] fs, xfs: block map immutable files for dax, dma-to-storage, and swap
Date: Mon, 21 Aug 2017 11:16:57 +0200 [thread overview]
Message-ID: <20170821091657.5bmigyfo7nzglak6@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20170814124059.GC17820@quack2.suse.cz>
On Mon, Aug 14, 2017 at 02:40:59PM +0200, Jan Kara wrote:
> Hum, this proposal (and the problems you are trying to deal with) seem very
> similar to Peter Zijlstra's mpin() proposal from 2014 [1], just moved to
> the DAX area (and so additionally complicated by the fact that filesystems
> now have to care). The patch set was not merged due to lack of interest I
> think but it looked sensible and the proposed API would make sense for more
> stuff than just DAX so maybe it would be better than MAP_DIRECT flag?
>
> [1] https://lwn.net/Articles/600502/
Thanks for thinking of that. The main sticking point was that I never
got it working for RDMA, I got hopelessly lost in that code.
Also I feel (and still do) that mpin() would be very useful for CMA,
mpin() would be a good moment to migrate/compact the pages and get out
of the way.
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Linux-nvdimm@lists.01.org
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WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: Dan Williams <dan.j.williams@intel.com>,
Christoph Hellwig <hch@lst.de>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
Dave Chinner <david@fromorbit.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-xfs@vger.kernel.org, Jeff Moyer <jmoyer@redhat.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andy Lutomirski <luto@kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Ross Zwisler <ross.zwisler@linux.intel.com>,
Linux API <linux-api@vger.kernel.org>
Subject: Re: [PATCH v2 0/5] fs, xfs: block map immutable files for dax, dma-to-storage, and swap
Date: Mon, 21 Aug 2017 11:16:57 +0200 [thread overview]
Message-ID: <20170821091657.5bmigyfo7nzglak6@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20170814124059.GC17820@quack2.suse.cz>
On Mon, Aug 14, 2017 at 02:40:59PM +0200, Jan Kara wrote:
> Hum, this proposal (and the problems you are trying to deal with) seem very
> similar to Peter Zijlstra's mpin() proposal from 2014 [1], just moved to
> the DAX area (and so additionally complicated by the fact that filesystems
> now have to care). The patch set was not merged due to lack of interest I
> think but it looked sensible and the proposed API would make sense for more
> stuff than just DAX so maybe it would be better than MAP_DIRECT flag?
>
> [1] https://lwn.net/Articles/600502/
Thanks for thinking of that. The main sticking point was that I never
got it working for RDMA, I got hopelessly lost in that code.
Also I feel (and still do) that mpin() would be very useful for CMA,
mpin() would be a good moment to migrate/compact the pages and get out
of the way.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>
Cc: "linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org"
<linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"Darrick J. Wong"
<darrick.wong-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Dave Chinner <david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Alexander Viro
<viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
linux-fsdevel
<linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Subject: Re: [PATCH v2 0/5] fs, xfs: block map immutable files for dax, dma-to-storage, and swap
Date: Mon, 21 Aug 2017 11:16:57 +0200 [thread overview]
Message-ID: <20170821091657.5bmigyfo7nzglak6@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20170814124059.GC17820-4I4JzKEfoa/jFM9bn6wA6Q@public.gmane.org>
On Mon, Aug 14, 2017 at 02:40:59PM +0200, Jan Kara wrote:
> Hum, this proposal (and the problems you are trying to deal with) seem very
> similar to Peter Zijlstra's mpin() proposal from 2014 [1], just moved to
> the DAX area (and so additionally complicated by the fact that filesystems
> now have to care). The patch set was not merged due to lack of interest I
> think but it looked sensible and the proposed API would make sense for more
> stuff than just DAX so maybe it would be better than MAP_DIRECT flag?
>
> [1] https://lwn.net/Articles/600502/
Thanks for thinking of that. The main sticking point was that I never
got it working for RDMA, I got hopelessly lost in that code.
Also I feel (and still do) that mpin() would be very useful for CMA,
mpin() would be a good moment to migrate/compact the pages and get out
of the way.
next prev parent reply other threads:[~2017-08-21 9:14 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-04 2:28 [PATCH v2 0/5] fs, xfs: block map immutable files for dax, dma-to-storage, and swap Dan Williams
2017-08-04 2:28 ` Dan Williams
2017-08-04 2:28 ` [PATCH v2 1/5] fs, xfs: introduce S_IOMAP_IMMUTABLE Dan Williams
2017-08-04 2:28 ` Dan Williams
2017-08-04 20:00 ` Darrick J. Wong
2017-08-04 20:00 ` Darrick J. Wong
2017-08-04 20:31 ` Dan Williams
2017-08-04 20:31 ` Dan Williams
2017-08-05 9:47 ` Christoph Hellwig
2017-08-05 9:47 ` Christoph Hellwig
2017-08-07 0:25 ` Dave Chinner
2017-08-07 0:25 ` Dave Chinner
2017-08-11 10:34 ` Christoph Hellwig
2017-08-11 10:34 ` Christoph Hellwig
2017-08-04 2:28 ` [PATCH v2 2/5] fs, xfs: introduce FALLOC_FL_SEAL_BLOCK_MAP Dan Williams
2017-08-04 2:28 ` Dan Williams
2017-08-04 2:28 ` Dan Williams
2017-08-04 19:46 ` Darrick J. Wong
2017-08-04 19:46 ` Darrick J. Wong
2017-08-04 19:52 ` Dan Williams
2017-08-04 19:52 ` Dan Williams
2017-08-04 23:31 ` Dave Chinner
2017-08-04 23:31 ` Dave Chinner
2017-08-04 23:43 ` Dan Williams
2017-08-04 23:43 ` Dan Williams
2017-08-05 0:04 ` Dave Chinner
2017-08-05 0:04 ` Dave Chinner
2017-08-04 2:28 ` [PATCH v2 3/5] fs, xfs: introduce FALLOC_FL_UNSEAL_BLOCK_MAP Dan Williams
2017-08-04 2:28 ` Dan Williams
2017-08-04 20:04 ` Darrick J. Wong
2017-08-04 20:04 ` Darrick J. Wong
2017-08-04 20:36 ` Dan Williams
2017-08-04 20:36 ` Dan Williams
2017-08-04 2:28 ` [PATCH v2 4/5] xfs: introduce XFS_DIFLAG2_IOMAP_IMMUTABLE Dan Williams
2017-08-04 2:28 ` Dan Williams
2017-08-04 20:33 ` Darrick J. Wong
2017-08-04 20:33 ` Darrick J. Wong
2017-08-04 20:45 ` Dan Williams
2017-08-04 20:45 ` Dan Williams
2017-08-04 23:46 ` Dave Chinner
2017-08-04 23:46 ` Dave Chinner
2017-08-04 23:57 ` Darrick J. Wong
2017-08-04 23:57 ` Darrick J. Wong
2017-08-04 2:28 ` [PATCH v2 5/5] xfs: toggle XFS_DIFLAG2_IOMAP_IMMUTABLE in response to fallocate Dan Williams
2017-08-04 2:28 ` Dan Williams
2017-08-04 20:14 ` Darrick J. Wong
2017-08-04 20:14 ` Darrick J. Wong
2017-08-04 20:47 ` Dan Williams
2017-08-04 20:47 ` Dan Williams
2017-08-04 20:53 ` Darrick J. Wong
2017-08-04 20:53 ` Darrick J. Wong
2017-08-04 20:55 ` Dan Williams
2017-08-04 20:55 ` Dan Williams
2017-08-04 2:38 ` [PATCH v2 0/5] fs, xfs: block map immutable files for dax, dma-to-storage, and swap Dan Williams
2017-08-04 2:38 ` Dan Williams
2017-08-04 2:38 ` Dan Williams
2017-08-05 9:50 ` Christoph Hellwig
2017-08-05 9:50 ` Christoph Hellwig
2017-08-05 9:50 ` Christoph Hellwig
2017-08-06 18:51 ` Dan Williams
2017-08-06 18:51 ` Dan Williams
2017-08-06 18:51 ` Dan Williams
2017-08-11 10:44 ` Christoph Hellwig
2017-08-11 10:44 ` Christoph Hellwig
2017-08-11 10:44 ` Christoph Hellwig
2017-08-11 22:26 ` Dan Williams
2017-08-11 22:26 ` Dan Williams
2017-08-11 22:26 ` Dan Williams
2017-08-12 3:57 ` Andy Lutomirski
2017-08-12 3:57 ` Andy Lutomirski
2017-08-12 4:44 ` Dan Williams
2017-08-12 4:44 ` Dan Williams
2017-08-12 4:44 ` Dan Williams
2017-08-12 7:34 ` Christoph Hellwig
2017-08-12 7:34 ` Christoph Hellwig
2017-08-12 7:34 ` Christoph Hellwig
2017-08-12 7:33 ` Christoph Hellwig
2017-08-12 7:33 ` Christoph Hellwig
2017-08-12 7:33 ` Christoph Hellwig
2017-08-12 19:19 ` Dan Williams
2017-08-12 19:19 ` Dan Williams
2017-08-12 19:19 ` Dan Williams
2017-08-13 9:24 ` Christoph Hellwig
2017-08-13 9:24 ` Christoph Hellwig
2017-08-13 20:31 ` Dan Williams
2017-08-13 20:31 ` Dan Williams
2017-08-13 20:31 ` Dan Williams
2017-08-14 12:40 ` Jan Kara
2017-08-14 12:40 ` Jan Kara
2017-08-14 12:40 ` Jan Kara
2017-08-14 16:14 ` Dan Williams
2017-08-14 16:14 ` Dan Williams
2017-08-15 8:37 ` Jan Kara
2017-08-15 8:37 ` Jan Kara
2017-08-15 8:37 ` Jan Kara
2017-08-15 23:50 ` Dan Williams
2017-08-15 23:50 ` Dan Williams
2017-08-16 13:57 ` Jan Kara
2017-08-16 13:57 ` Jan Kara
2017-08-16 13:57 ` Jan Kara
2017-08-21 9:16 ` Peter Zijlstra [this message]
2017-08-21 9:16 ` Peter Zijlstra
2017-08-21 9:16 ` Peter Zijlstra
2017-08-14 21:46 ` Darrick J. Wong
2017-08-14 21:46 ` Darrick J. Wong
2017-08-14 21:46 ` Darrick J. Wong
2017-08-13 23:46 ` Dave Chinner
2017-08-13 23:46 ` Dave Chinner
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