From: Eric Sandeen <sandeen@redhat.com>
To: Theodore Tso <tytso@mit.edu>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
cmm@us.ibm.com, linux-ext4@vger.kernel.org
Subject: Re: [PATCH -V4 2/2] ext4: Use -1 as the fake block number for delayed new buffer_head
Date: Wed, 29 Apr 2009 10:37:34 -0500 [thread overview]
Message-ID: <49F8743E.7090201@redhat.com> (raw)
In-Reply-To: <20090429153521.GC14264@mit.edu>
Theodore Tso wrote:
> On Wed, Apr 29, 2009 at 10:17:21AM +0530, Aneesh Kumar K.V wrote:
>> Block number '0' should not be used as the fake block number for
>> the delayed new buffer. This will result in vfs calling umap_underlying_metadata for
>> block number '0'. So use -1 instead.
>
> sector_t is an unsigned type, so we probably want to use ~0 instead of
> -1. I can fix this up before we apply into the patch queue.
I don't think that helps. The point is to have a block number which is
invalid, therefore won't get unmapped or accidentally written to ...
-Eric
> Are we agreed both of these should probably be pushed to Linus for
> 2.6.30?
>
> - Ted
next prev parent reply other threads:[~2009-04-29 15:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-29 4:47 [PATCH -V4 1/2] Fix sub-block zeroing for buffered writes into unwritten extents Aneesh Kumar K.V
2009-04-29 4:47 ` [PATCH -V4 2/2] ext4: Use -1 as the fake block number for delayed new buffer_head Aneesh Kumar K.V
2009-04-29 13:59 ` Eric Sandeen
2009-04-29 15:35 ` Theodore Tso
2009-04-29 15:37 ` Eric Sandeen [this message]
2009-04-29 16:52 ` Theodore Tso
2009-04-29 17:01 ` Eric Sandeen
2009-05-04 8:54 ` Aneesh Kumar K.V
2009-05-04 15:06 ` Eric Sandeen
2009-05-12 15:17 ` [PATCH -V5] " Aneesh Kumar K.V
2009-04-29 13:59 ` [PATCH -V4 1/2] Fix sub-block zeroing for buffered writes into unwritten extents Eric Sandeen
2009-04-29 17:28 ` Mingming
2009-05-12 2:42 ` Theodore Tso
2009-05-12 3:37 ` Eric Sandeen
2009-05-12 15:16 ` [PATCH -V5] Fix sub-block zeroing for buffered writes intounwritten extents Aneesh Kumar K.V
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=49F8743E.7090201@redhat.com \
--to=sandeen@redhat.com \
--cc=aneesh.kumar@linux.vnet.ibm.com \
--cc=cmm@us.ibm.com \
--cc=linux-ext4@vger.kernel.org \
--cc=tytso@mit.edu \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.