From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>,
"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>,
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: Sat, 12 Aug 2017 09:34:26 +0200 [thread overview]
Message-ID: <20170812073426.GB12679@lst.de> (raw)
In-Reply-To: <CALCETrVvMbaxobdydtsdQWHyP1VhL1fpq1qS4M3=SmR1y4x5kw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Fri, Aug 11, 2017 at 08:57:18PM -0700, Andy Lutomirski wrote:
> One thing that makes me quite nervous about S_IOMAP_IMMUTABLE is the
> degree to which things go badly if one program relies on it while
> another program clears the flag: you risk corrupting unrelated
> filesystem metadata. I think a userspace interface to pin the extent
> mapping of a file really wants a way to reliably keep it pinned (or to
> reliably zap the userspace application if it gets unpinned).
The nice thing is that no application can rely on it anyway..
next prev parent reply other threads:[~2017-08-12 7:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <150181368442.32119.13336247800141074356.stgit@dwillia2-desk3.amr.corp.intel.com>
[not found] ` <150181368442.32119.13336247800141074356.stgit-p8uTFz9XbKj2zm6wflaqv1nYeNYlB/vhral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-08-04 2:38 ` [PATCH v2 0/5] fs, xfs: block map immutable files for dax, dma-to-storage, and swap Dan Williams
[not found] ` <CAPcyv4ii41F-Rj9pPGc0FHwrQ=hkSF_f0niQDn5_NjU-wcL+gg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-05 9:50 ` Christoph Hellwig
[not found] ` <20170805095013.GC14930-jcswGhMUV9g@public.gmane.org>
2017-08-06 18:51 ` Dan Williams
[not found] ` <CAPcyv4jgKmakB0WRUjx=2eD3YJ1x+C8cgnR6tA+g4+m+0etawQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-11 10:44 ` Christoph Hellwig
[not found] ` <20170811104429.GA13736-jcswGhMUV9g@public.gmane.org>
2017-08-11 22:26 ` Dan Williams
2017-08-12 3:57 ` Andy Lutomirski
[not found] ` <CALCETrVvMbaxobdydtsdQWHyP1VhL1fpq1qS4M3=SmR1y4x5kw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-12 4:44 ` Dan Williams
2017-08-12 7:34 ` Christoph Hellwig [this message]
[not found] ` <CAPcyv4jrZ5a+zmAehZDxfP=+6BNCFAXOFWro2L7ruLkk+cY7OQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-12 7:33 ` Christoph Hellwig
[not found] ` <20170812073349.GA12679-jcswGhMUV9g@public.gmane.org>
2017-08-12 19:19 ` Dan Williams
2017-08-13 9:24 ` Christoph Hellwig
[not found] ` <20170813092436.GB32112-jcswGhMUV9g@public.gmane.org>
2017-08-13 20:31 ` Dan Williams
[not found] ` <CAPcyv4ixTgSWG9K2Eg3XJmOvqJht81qL+Z3njoOjcXCD7XMpZw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-14 12:40 ` Jan Kara
2017-08-14 16:14 ` Dan Williams
[not found] ` <CAPcyv4hi_Y5Qj=h_Qf4Bcyv+EWBosa2gQT+-8ro3hPY9VMshSA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-15 8:37 ` Jan Kara
2017-08-15 23:50 ` Dan Williams
[not found] ` <CAPcyv4hFTn4Fz5o+Gm857mS-RA6WAVsf4CmwiLiK2O8w2_SamQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-16 13:57 ` Jan Kara
[not found] ` <20170814124059.GC17820-4I4JzKEfoa/jFM9bn6wA6Q@public.gmane.org>
2017-08-21 9:16 ` Peter Zijlstra
2017-08-14 21:46 ` Darrick J. Wong
2017-08-13 23:46 ` Dave Chinner
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