[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies
From: |
Jeff Darcy |
Subject: |
Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies |
Date: |
Thu, 28 Mar 2013 11:15:01 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4 |
On 03/28/2013 10:07 AM, Theodore Ts'o wrote:
> Any update about whether Gluster can address this without needing the
> ioctl patch? Or should we push the ioctl patch into ext4 for the next
> merge window?
We have two approaches that don't require the ioctl patch:
* http://review.gluster.org/#change,4675
This takes the approach of mapping between the underlying filesystems'
d_off values and our own, using a cache. It works for obvious cases,
but it's a really horrible kludge.
* http://review.gluster.org/#change,4711
This is Avati's and Zach's approach, which "rounds off" the ext4 d_off
values to free up some bits that we can use. There seems to be a
general consensus (among the people who've discussed it on this list)
that the approach is preferable, but it doesn't quite work yet.
Between those two and the possibility of "tune2fs -O ^dir_index" I think
we can keep this from affecting our users, but since they're both a bit
unclean in different ways the ioctl might still be desirable. I'll let
others who've been more involved with that (e.g. Avati/Zach/Eric) give a
more authoritative answer.
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Bernd Schubert, 2013/03/26
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Eric Sandeen, 2013/03/26
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Theodore Ts'o, 2013/03/28
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies,
Jeff Darcy <=
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Eric Sandeen, 2013/03/28
- Message not available
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Anand Avati, 2013/03/28
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, J. Bruce Fields, 2013/03/28
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Anand Avati, 2013/03/28
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Jeff Darcy, 2013/03/28
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Anand Avati, 2013/03/28
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Anand Avati, 2013/03/28
- Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies, Jeff Darcy, 2013/03/28