From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Andreas Dilger <adilger@dilger.ca>,
Dan Williams <dan.j.williams@intel.com>,
Christoph Hellwig <hch@infradead.org>,
Xiong Zhou <xzhou@redhat.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-xfs <linux-xfs@vger.kernel.org>,
Eric Sandeen <sandeen@sandeen.net>,
fstests <fstests@vger.kernel.org>,
linux-nvdimm <linux-nvdimm@lists.01.org>
Subject: Re: ioctl FIBMAP for dax gone in v4.17-rc1
Date: Tue, 17 Apr 2018 19:34:59 -0400 [thread overview]
Message-ID: <20180417233459.GB23194@thunk.org> (raw)
In-Reply-To: <20180417175007.GB5210@magnolia>
On Tue, Apr 17, 2018 at 10:50:07AM -0700, Darrick J. Wong wrote:
> syslinux does FIEMAP w/ FIBMAP fallback.
>
> lilo & elilo still use FIBMAP only, but lilo hasn't seen a release since
> 2015 and elilo 2013. I prefer not to add FIBMAP support in XFS-DAX for
> the singular case of booting off pmem via lilo.
It shouldn't be that hard to write a userspace emulation layer which
exports a FIBMAP-like functional interface but gets the information
from the kernel using the FIMAP ioctl....
- Ted
WARNING: multiple messages have this Message-ID (diff)
From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Andreas Dilger <adilger@dilger.ca>,
linux-xfs <linux-xfs@vger.kernel.org>,
linux-nvdimm <linux-nvdimm@lists.01.org>,
Eric Sandeen <sandeen@sandeen.net>,
fstests <fstests@vger.kernel.org>,
Christoph Hellwig <hch@infradead.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: ioctl FIBMAP for dax gone in v4.17-rc1
Date: Tue, 17 Apr 2018 19:34:59 -0400 [thread overview]
Message-ID: <20180417233459.GB23194@thunk.org> (raw)
In-Reply-To: <20180417175007.GB5210@magnolia>
On Tue, Apr 17, 2018 at 10:50:07AM -0700, Darrick J. Wong wrote:
> syslinux does FIEMAP w/ FIBMAP fallback.
>
> lilo & elilo still use FIBMAP only, but lilo hasn't seen a release since
> 2015 and elilo 2013. I prefer not to add FIBMAP support in XFS-DAX for
> the singular case of booting off pmem via lilo.
It shouldn't be that hard to write a userspace emulation layer which
exports a FIBMAP-like functional interface but gets the information
from the kernel using the FIMAP ioctl....
- Ted
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Linux-nvdimm@lists.01.org
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next prev parent reply other threads:[~2018-04-17 23:35 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-17 14:40 ioctl FIBMAP for dax gone in v4.17-rc1 Xiong Zhou
2018-04-17 14:40 ` Xiong Zhou
2018-04-17 16:10 ` Christoph Hellwig
2018-04-17 16:10 ` Christoph Hellwig
2018-04-17 16:53 ` Dan Williams
2018-04-17 16:53 ` Dan Williams
2018-04-17 16:57 ` Darrick J. Wong
2018-04-17 16:57 ` Darrick J. Wong
2018-04-17 17:05 ` Dan Williams
2018-04-17 17:05 ` Dan Williams
2018-04-17 17:40 ` Andreas Dilger
2018-04-17 17:47 ` Dan Williams
2018-04-17 17:47 ` Dan Williams
2018-04-17 17:50 ` Darrick J. Wong
2018-04-17 17:50 ` Darrick J. Wong
2018-04-17 23:34 ` Theodore Y. Ts'o [this message]
2018-04-17 23:34 ` Theodore Y. Ts'o
2018-04-17 23:36 ` Dave Chinner
2018-04-17 23:36 ` Dave Chinner
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