From: Boaz Harrosh <boaz-/8YdC2HfS5554TAoqtyWWQ@public.gmane.org>
To: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
Dave Chinner <david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nvdimm-y27Ovi1pjclAfugRpC6u6w@public.gmane.org,
xfs-VZNHf3L845pBDgjK7y7TUQ@public.gmane.org
Subject: Re: xfs: untangle the direct I/O and DAX path, fix DAX locking
Date: Tue, 28 Jun 2016 16:27:03 +0300 [thread overview]
Message-ID: <57727B27.7060104@plexistor.com> (raw)
In-Reply-To: <20160628131059.GA30475-jcswGhMUV9g@public.gmane.org>
On 06/28/2016 04:10 PM, Christoph Hellwig wrote:
> On Sat, Jun 25, 2016 at 09:00:45AM +1000, Dave Chinner wrote:
<>
>
> Right. And an existing application can get DAX turned on under its
> back, and will now suddently get different synchronization behavior.
> That is if it's writes happen to be aligned to the fs block size.
>
Is there an actual application that does that? or is this purely
theoretical right now?
Thanks
Boaz
WARNING: multiple messages have this Message-ID (diff)
From: Boaz Harrosh <boaz@plexistor.com>
To: Christoph Hellwig <hch@lst.de>, Dave Chinner <david@fromorbit.com>
Cc: linux-fsdevel@vger.kernel.org, linux-nvdimm@ml01.01.org, xfs@oss.sgi.com
Subject: Re: xfs: untangle the direct I/O and DAX path, fix DAX locking
Date: Tue, 28 Jun 2016 16:27:03 +0300 [thread overview]
Message-ID: <57727B27.7060104@plexistor.com> (raw)
In-Reply-To: <20160628131059.GA30475@lst.de>
On 06/28/2016 04:10 PM, Christoph Hellwig wrote:
> On Sat, Jun 25, 2016 at 09:00:45AM +1000, Dave Chinner wrote:
<>
>
> Right. And an existing application can get DAX turned on under its
> back, and will now suddently get different synchronization behavior.
> That is if it's writes happen to be aligned to the fs block size.
>
Is there an actual application that does that? or is this purely
theoretical right now?
Thanks
Boaz
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xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
WARNING: multiple messages have this Message-ID (diff)
From: Boaz Harrosh <boaz@plexistor.com>
To: Christoph Hellwig <hch@lst.de>, Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com, linux-fsdevel@vger.kernel.org, linux-nvdimm@ml01.01.org
Subject: Re: xfs: untangle the direct I/O and DAX path, fix DAX locking
Date: Tue, 28 Jun 2016 16:27:03 +0300 [thread overview]
Message-ID: <57727B27.7060104@plexistor.com> (raw)
In-Reply-To: <20160628131059.GA30475@lst.de>
On 06/28/2016 04:10 PM, Christoph Hellwig wrote:
> On Sat, Jun 25, 2016 at 09:00:45AM +1000, Dave Chinner wrote:
<>
>
> Right. And an existing application can get DAX turned on under its
> back, and will now suddently get different synchronization behavior.
> That is if it's writes happen to be aligned to the fs block size.
>
Is there an actual application that does that? or is this purely
theoretical right now?
Thanks
Boaz
next prev parent reply other threads:[~2016-06-28 13:27 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-22 15:27 xfs: untangle the direct I/O and DAX path, fix DAX locking Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
[not found] ` <1466609236-23801-1-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-06-22 15:27 ` [PATCH 1/8] xfs: don't pass ioflags around in the ioctl path Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` [PATCH 2/8] xfs: kill ioflags Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` [PATCH 3/8] xfs: remove s_maxbytes enforcement in xfs_file_read_iter Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` [PATCH 4/8] xfs: split xfs_file_read_iter into buffered and direct I/O helpers Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` [PATCH 5/8] xfs: stop using generic_file_read_iter for direct I/O Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` [PATCH 6/8] xfs: direct calls in the direct I/O path Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` [PATCH 7/8] xfs: split direct I/O and DAX path Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
[not found] ` <1466609236-23801-8-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-09-29 2:53 ` Darrick J. Wong
2016-09-29 2:53 ` Darrick J. Wong
2016-09-29 2:53 ` Darrick J. Wong
2016-09-29 8:38 ` aio completions vs file_accessed race, was: " Christoph Hellwig
2016-09-29 8:38 ` Christoph Hellwig
2016-09-29 20:18 ` Christoph Hellwig
2016-09-29 20:18 ` Christoph Hellwig
2016-09-29 20:18 ` Christoph Hellwig
2016-09-29 20:18 ` Christoph Hellwig
2016-09-29 20:33 ` Darrick J. Wong
2016-09-29 20:33 ` Darrick J. Wong
2016-06-22 15:27 ` [PATCH 8/8] xfs: fix locking for DAX writes Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-22 15:27 ` Christoph Hellwig
2016-06-23 14:22 ` Boaz Harrosh
2016-06-23 14:22 ` Boaz Harrosh
2016-06-23 23:24 ` xfs: untangle the direct I/O and DAX path, fix DAX locking Dave Chinner
2016-06-23 23:24 ` Dave Chinner
2016-06-23 23:24 ` Dave Chinner
2016-06-24 1:14 ` Dan Williams
2016-06-24 1:14 ` Dan Williams
2016-06-24 7:13 ` Dave Chinner
2016-06-24 7:13 ` Dave Chinner
2016-06-24 7:31 ` Christoph Hellwig
2016-06-24 7:31 ` Christoph Hellwig
2016-06-24 7:26 ` Christoph Hellwig
2016-06-24 7:26 ` Christoph Hellwig
2016-06-24 7:26 ` Christoph Hellwig
2016-06-24 23:00 ` Dave Chinner
2016-06-24 23:00 ` Dave Chinner
2016-06-28 13:10 ` Christoph Hellwig
2016-06-28 13:10 ` Christoph Hellwig
2016-06-28 13:10 ` Christoph Hellwig
[not found] ` <20160628131059.GA30475-jcswGhMUV9g@public.gmane.org>
2016-06-28 13:27 ` Boaz Harrosh [this message]
2016-06-28 13:27 ` Boaz Harrosh
2016-06-28 13:27 ` Boaz Harrosh
[not found] ` <57727B27.7060104-/8YdC2HfS5554TAoqtyWWQ@public.gmane.org>
2016-06-28 13:39 ` Christoph Hellwig
2016-06-28 13:39 ` Christoph Hellwig
2016-06-28 13:39 ` Christoph Hellwig
[not found] ` <20160628133928.GB31283-jcswGhMUV9g@public.gmane.org>
2016-06-28 13:56 ` Boaz Harrosh
2016-06-28 13:56 ` Boaz Harrosh
2016-06-28 13:56 ` Boaz Harrosh
[not found] ` <5772820E.2080403-/8YdC2HfS5554TAoqtyWWQ@public.gmane.org>
2016-06-28 15:39 ` Christoph Hellwig
2016-06-28 15:39 ` Christoph Hellwig
2016-06-28 15:39 ` Christoph Hellwig
[not found] ` <20160628153925.GA2643-jcswGhMUV9g@public.gmane.org>
2016-06-29 12:23 ` Boaz Harrosh
2016-06-29 12:23 ` Boaz Harrosh
2016-06-29 12:23 ` Boaz Harrosh
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