LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Alasdair G Kergon <agk@redhat.com>
To: Tejun Heo <tj@kernel.org>
Cc: Milan Broz <mbroz@redhat.com>, Alasdair G Kergon <agk@redhat.com>,
	device-mapper development <dm-devel@redhat.com>,
	Jens Axboe <axboe@kernel.dk>, Tao Ma <tm@tao.ma>,
	linux-kernel@vger.kernel.org
Subject: Re: [dm-devel] [PATCH][RFC] dm: Do not open log and cow device read-write for read-only mappings
Date: Tue, 15 Feb 2011 16:56:18 +0000	[thread overview]
Message-ID: <20110215165618.GA28164@agk-dp.fab.redhat.com> (raw)
In-Reply-To: <20110215164128.GQ3160@htj.dyndns.org>

On Tue, Feb 15, 2011 at 05:41:28PM +0100, Tejun Heo wrote:
> That said, maybe -EROFS is the better fit.  I really have no idea.
> Maybe we should just revert and leave rw accesses to ro block devices
> alone.
 
I'd agree that the change to enforce readonly devs is a desirable change
to make.  But we're still discovering exactly what things it breaks and
as well as further kernel patches some userspace changes seem
unavoidable.  Personally I'd prefer it if this change went back into
linux-next to give us more time to prepare for it cleanly.  It's
unfortunate none of us picked up on these problems sooner.

Alasdair


  reply	other threads:[~2011-02-15 16:56 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-13  2:02 block device read-only handling regression in 2.6.38-rc4 (bisected) Milan Broz
2011-02-13 10:58 ` [PATCH] loop: clear read-only flag in loop_clr_fd Tao Ma
2011-02-13 14:11   ` Milan Broz
2011-02-13 15:05     ` Tao Ma
2011-02-13 16:44       ` Milan Broz
2011-02-14 10:30         ` Tejun Heo
2011-02-14 11:47           ` Milan Broz
2011-02-14 13:14             ` [PATCH][RFC] dm: Do not open log and cow device read-write for read-only mappings Milan Broz
2011-02-14 14:09               ` Tejun Heo
2011-02-14 14:23                 ` Milan Broz
2011-02-14 15:44                   ` Tejun Heo
2011-02-14 23:15                     ` NeilBrown
2011-02-15  2:03                       ` [dm-devel] " Alasdair G Kergon
2011-02-15 12:17                         ` Milan Broz
2011-02-15 12:46                           ` Alasdair G Kergon
2011-02-15 15:20                             ` Tejun Heo
2011-02-15 15:46                               ` Alasdair G Kergon
2011-02-15 15:50                                 ` Tejun Heo
2011-02-15 16:05                                   ` Milan Broz
2011-02-15 16:12                                     ` Tejun Heo
2011-02-15 16:36                                       ` Milan Broz
2011-02-15 16:41                                         ` Tejun Heo
2011-02-15 16:56                                           ` Alasdair G Kergon [this message]
2011-02-16  8:46                                             ` Tejun Heo
2011-02-15 16:58                                           ` Milan Broz
2011-02-16  8:39                                             ` Tejun Heo
2011-02-15 15:16                           ` [PATCH] Return EROFS if read-only detected on block device Milan Broz
2011-02-14 14:39                 ` [dm-devel] [PATCH][RFC] dm: Do not open log and cow device read-write for read-only mappings Alasdair G Kergon
2011-02-14 14:07             ` [PATCH] loop: clear read-only flag in loop_clr_fd Tejun Heo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20110215165618.GA28164@agk-dp.fab.redhat.com \
    --to=agk@redhat.com \
    --cc=axboe@kernel.dk \
    --cc=dm-devel@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mbroz@redhat.com \
    --cc=tj@kernel.org \
    --cc=tm@tao.ma \
    --subject='Re: [dm-devel] [PATCH][RFC] dm: Do not open log and cow device read-write for read-only mappings' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).