From: Christoph Hellwig <hch@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Niels de Vos <ndevos@redhat.com>,
Christoph Hellwig <hch@infradead.org>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
Al Viro <viro@zeniv.linux.org.uk>,
Mikulas Patocka <mpatocka@redhat.com>,
Jeff Moyer <jmoyer@redhat.com>, "Bryn M. Reeves" <bmr@redhat.com>
Subject: Re: [PATCH v3] fs: Invalidate the cache for a parent block-device if fsync() is called for a partition
Date: Tue, 31 Jan 2012 14:04:25 -0500 [thread overview]
Message-ID: <20120131190425.GA10533@infradead.org> (raw)
In-Reply-To: <20120131105824.c48351b6.akpm@linux-foundation.org>
On Tue, Jan 31, 2012 at 10:58:24AM -0800, Andrew Morton wrote:
> One concern I have with the proposal is that it would forever rule out
> support of >16T devices on 32-bit machines.
>
> At present with 64-bit sector_t and 32-bit pgoff_t, I think we'd have a
> reasonable chance of supporting, say, four 8T partitions on a 32T
> device. But if we were to switch the kernel from using four 4T
> address_spaces (sda1-4) over to using a single 32T address_space (sda)
> then we can rule it all out.
how do you plan to write the partition label in your hypothetic setup
if you can't open the main device?
And even if we solved that and people could create partitions on these
devices but not open the main device, or use large lvm volumes it would
be an absolutely major confusion.
So I really don't think your made up case matters.
next prev parent reply other threads:[~2012-01-31 19:04 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-20 1:58 [PATCH] block: Invalidate the cache for a parent block-device Mikulas Patocka
2012-01-20 9:35 ` Niels de Vos
2012-01-23 10:38 ` [PATCH v2] fs: Invalidate the cache for a parent block-device if fsync() is called for a partition Niels de Vos
2012-01-23 16:27 ` Jeff Moyer
2012-01-23 16:46 ` Niels de Vos
2012-01-23 19:23 ` Mikulas Patocka
2012-01-23 20:04 ` Jeff Moyer
2012-01-26 10:03 ` Andrew Morton
2012-01-26 11:50 ` Niels de Vos
2012-01-26 13:33 ` [PATCH v3] " Niels de Vos
2012-01-26 21:40 ` Andrew Morton
2012-01-26 21:45 ` Christoph Hellwig
2012-01-26 21:50 ` Mikulas Patocka
2012-01-27 12:19 ` Ric Wheeler
2012-01-31 16:00 ` Niels de Vos
2012-01-31 18:58 ` Andrew Morton
2012-01-31 19:04 ` Christoph Hellwig [this message]
2012-01-31 19:32 ` Andrew Morton
2012-01-31 19:37 ` Christoph Hellwig
2012-01-31 19:48 ` Andrew Morton
2012-01-26 21:49 ` Jeff Moyer
2012-01-26 22:13 ` Mikulas Patocka
2012-01-26 22:26 ` Kernel Oops report (Android gingerbread) Fan Zhang
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=20120131190425.GA10533@infradead.org \
--to=hch@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=bmr@redhat.com \
--cc=jmoyer@redhat.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mpatocka@redhat.com \
--cc=ndevos@redhat.com \
--cc=viro@zeniv.linux.org.uk \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).