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From: Roman Mamedov <rm@romanrm.net>
To: Marc MERLIN <marc@merlins.org>
Cc: dsterba@suse.cz, Martin Steigerwald <martin@lichtvoll.de>,
	Josef Bacik <josef@toxicpanda.com>,
	linux-btrfs@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH] btrfs: do not zero f_bavail if we have available space
Date: Wed, 19 Feb 2020 22:50:51 +0500	[thread overview]
Message-ID: <20200219225051.39ca1082@natsu> (raw)
In-Reply-To: <20200219153652.GA26873@merlins.org>

On Wed, 19 Feb 2020 07:36:52 -0800
Marc MERLIN <marc@merlins.org> wrote:

> Thanks. For some reason, debian's latest make-kpkg hangs forever on 5.5
> kernels (not sure why) so I can't build it right now, but I just got
> 5.4.20 and I'm compiling that now, thanks.

Debian deprecates their own tooling for regular users (as opposed to package
mantainers) to easily make custom kernel deb packages[1], they now suggest to
use the kernel-provided "make bindeb-pkg" instead. 

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=925411#17

> As for dm-thin, I'm not sure yet, I'll find out when the new kernel is
> installed. I was also hoping fstrim would work, I guess I'll find out.

Indeed fstrim does deprovision backing storage on thin LVM just fine.

However I am not sure what is the relation with the bug being discussed. The
"zero f_bavail" was just returning "0" to df, while that was not actually
true. Seems puzzling how would that lead to increased usage of dm-thin for you.

-- 
With respect,
Roman

  reply	other threads:[~2020-02-19 17:50 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-31 14:31 [PATCH] btrfs: do not zero f_bavail if we have available space Josef Bacik
2020-01-31 20:06 ` Martin Steigerwald
2020-02-01  1:00 ` Qu Wenruo
2020-02-02 17:52 ` David Sterba
     [not found]   ` <CAKhhfD7S=kcKLRURdNFZ8H4beS8=XjFvnOQXche7+SVOGFGC_w@mail.gmail.com>
2020-02-19  9:17     ` Martin Steigerwald
2020-02-19 13:43       ` Marc MERLIN
2020-02-19 14:31         ` David Sterba
2020-02-19 15:36           ` Marc MERLIN
2020-02-19 17:50             ` Roman Mamedov [this message]
2020-02-19 22:21               ` Martin Steigerwald
2020-02-20 21:46             ` Marc MERLIN
2020-02-21  5:38               ` Marc MERLIN
2020-02-21  5:45                 ` Roman Mamedov
2020-02-21 23:07                   ` btrfs filled up dm-thin and df%: shows 8.4TB of data used when I'm only using 10% of that Marc MERLIN
2020-02-21 23:17                     ` How to roll back btrfs filesystem a few revisions? Marc MERLIN
2020-02-21 23:47                       ` Josef Bacik
2020-02-22  0:08                         ` Marc MERLIN
2020-02-22  0:36                           ` Josef Bacik
2020-02-21 23:43                     ` btrfs filled up dm-thin and df%: shows 8.4TB of data used when I'm only using 10% of that Josef Bacik
2020-02-22  0:01                       ` Marc MERLIN
2020-02-22  0:43                         ` Josef Bacik
2020-02-22  1:06                         ` Marc MERLIN
2020-02-22  1:23                           ` Marc MERLIN
2020-02-22 14:51                             ` Marc MERLIN
2020-02-22 14:52                               ` Josef Bacik
2020-02-22 15:24                                 ` Marc MERLIN

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