linux-ext4 - Re: [PATCH 0/2] bigalloc + delalloc reservation leak fixes

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Date:   Tue, 8 May 2018 08:55:38 +0800
From:   Liu Bo <bo.liu@...ux.alibaba.com>
To:     "Theodore Y. Ts'o" <tytso@....edu>
Cc:     linux-ext4@...r.kernel.org, Eric Whitney <enwlinux@...il.com>
Subject: Re: [PATCH 0/2] bigalloc + delalloc reservation leak fixes

On Mon, May 07, 2018 at 10:52:16AM -0400, Theodore Y. Ts'o wrote:
> On Mon, May 07, 2018 at 10:18:10PM +0800, Liu Bo wrote:
> > These two fixes are to address the reservation leak problem we've
> > found when using bigalloc with delalloc.
> > 
> > A specific fstests case is available at
> > https://patchwork.kernel.org/patch/10384221/
> > 
> > Liu Bo (2):
> >   Ext4: bigalloc: fix overreservation on quota accounting
> >   Ext4: bigalloc: do not reserve space for delalloc extents if there is
> >     an available cluster
> 
> Hi Liu,
> 
> Eric has been working in this area as well, and has been working on a
> series of patches.  (This had been discussed on the weekly ext4
> teleconference calls; if this is something you would be interested in
> joining, please contact me via e-mail privately.)

Glad to know others are looking into the same issue.

Will contact you about the time of the meeting (most time I'm base in
the U.S. so that timezone is not a problem for me).

> 
> My understanding is that his patch series is a bit more complex, since
> he was working on a number of cleanups at the same time.  Eric, could
> you send out your patch series, even if they aren't fully polished, so
> we can see how much overlap there is between your work and Liu Bo's?
>

Cool, I'm happy to review Eric's patches.

My two patches addressed the problem found by the posted fstests
cases, maybe we can test Eric's patches against the testcase as a
start.

thanks,
-liubo