Groups > linux.kernel > #1206376

Re: regression introduced by "block: Add support for DAX reads/writes to block devices"

From	Jeff Moyer <jmoyer@redhat.com>
Newsgroups	linux.kernel
Subject	Re: regression introduced by "block: Add support for DAX reads/writes to block devices"
Date	2015-08-12 23:20 +0200
Message-ID	<pWLBg-7OK-3@gated-at.bofh.it> (permalink)
References	(1 earlier) <pUulb-367-7@gated-at.bofh.it> <pUBPH-5As-5@gated-at.bofh.it> <pUUpj-7nO-7@gated-at.bofh.it> <pUWKv-2i5-35@gated-at.bofh.it> <pVQ0i-7V2-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Boaz Harrosh <boaz@plexistor.com> writes:

> On 08/07/2015 11:41 PM, Jeff Moyer wrote:
> <>
>> 
>>> We need to cope with the case where the end of a partition isn't on a
>>> page boundary though.
>> 
>> Well, that's usually done by falling back to buffered I/O.  I gave that
>> a try and panicked the box.  :)  I'll keep looking into it, but probably
>> won't have another patch until next week.
>> 
>
> lets slow down for a sec, please.
>
> We have all established that an unaligned partition start is BAD and not supported?

No.  Unaligned partitions on RAID arrays or 512e devices are bad because
they result in suboptimal performance.  They are most certainly still
supported, though.

-Jeff
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Thread

regression introduced by "block: Add support for DAX reads/writes to block devices" Jeff Moyer <jmoyer@redhat.com> - 2015-08-05 22:20 +0200
  Re: regression introduced by "block: Add support for DAX  reads/writes to block devices" Dave Chinner <david@fromorbit.com> - 2015-08-06 00:10 +0200
    Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Linda Knippers <linda.knippers@hp.com> - 2015-08-06 03:50 +0200
      Re: regression introduced by "block: Add support for DAX  reads/writes to block devices" Dave Chinner <david@fromorbit.com> - 2015-08-06 05:30 +0200
        Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Boaz Harrosh <boaz@plexistor.com> - 2015-08-06 10:00 +0200
          Re: regression introduced by "block: Add support for DAX  reads/writes to block devices" Dave Chinner <david@fromorbit.com> - 2015-08-06 22:40 +0200
            Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Boaz Harrosh <boaz@plexistor.com> - 2015-08-09 11:00 +0200
              Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Linda Knippers <linda.knippers@hp.com> - 2015-08-10 18:40 +0200
                Re: regression introduced by "block: Add support for DAX  reads/writes to block devices" Dave Chinner <david@fromorbit.com> - 2015-08-10 23:30 +0200
                Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Linda Knippers <linda.knippers@hp.com> - 2015-08-11 01:10 +0200
  RE: regression introduced by "block: Add support for DAX  reads/writes to block devices" "Wilcox, Matthew R" <matthew.r.wilcox@intel.com> - 2015-08-06 16:30 +0200
    Re: regression introduced by "block: Add support for DAX reads/writes to block devices" Jeff Moyer <jmoyer@redhat.com> - 2015-08-06 17:40 +0200
      RE: regression introduced by "block: Add support for DAX  reads/writes to block devices" "Wilcox, Matthew R" <matthew.r.wilcox@intel.com> - 2015-08-06 18:00 +0200
    Re: regression introduced by "block: Add support for DAX reads/writes to block devices" Jeff Moyer <jmoyer@redhat.com> - 2015-08-07 00:30 +0200
      RE: regression introduced by "block: Add support for DAX  reads/writes to block devices" "Wilcox, Matthew R" <matthew.r.wilcox@intel.com> - 2015-08-07 20:20 +0200
        Re: regression introduced by "block: Add support for DAX reads/writes to block devices" Jeff Moyer <jmoyer@redhat.com> - 2015-08-07 22:50 +0200
          Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Boaz Harrosh <boaz@plexistor.com> - 2015-08-10 09:50 +0200
            Re: regression introduced by "block: Add support for DAX reads/writes to block devices" Jeff Moyer <jmoyer@redhat.com> - 2015-08-12 23:20 +0200
              Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 07:40 +0200
                Re: regression introduced by "block: Add support for DAX reads/writes to block devices" Jeff Moyer <jmoyer@redhat.com> - 2015-08-13 16:10 +0200
                Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Linda Knippers <linda.knippers@hp.com> - 2015-08-13 18:50 +0200
                Re: regression introduced by "block: Add support for DAX reads/writes to block devices" Jeff Moyer <jmoyer@redhat.com> - 2015-08-13 19:20 +0200
                Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Linda Knippers <linda.knippers@hp.com> - 2015-08-13 20:00 +0200
                Re: regression introduced by "block: Add support for DAX reads/writes to block devices" Jeff Moyer <jmoyer@redhat.com> - 2015-08-13 20:20 +0200
                RE: regression introduced by "block: Add support for DAX  reads/writes to block devices" "Wilcox, Matthew R" <matthew.r.wilcox@intel.com> - 2015-08-13 21:40 +0200
                Re: regression introduced by "block: Add support for DAX reads/writes  to block devices" Dan Williams <dan.j.williams@intel.com> - 2015-08-14 18:30 +0200

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