From: Jan Kara <jack@suse.cz>
To: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Jan Kara <jack@suse.cz>,
linux-ext4@vger.kernel.org, Ojaswin Mujoo <ojaswin@linux.ibm.com>,
Harshad Shirwadkar <harshadshirwadkar@gmail.com>,
Theodore Ts'o <tytso@mit.edu>,
Ritesh Harjani <riteshh@linux.ibm.com>,
linux-fsdevel@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Geetika.Moolchandani1@ibm.com, regressions@lists.linux.dev
Subject: Re: [Regression] ext4: changes to mb_optimize_scan cause issues on Raspberry Pi
Date: Mon, 15 Aug 2022 12:34:52 +0200 [thread overview]
Message-ID: <20220815103452.7hjx7ohzx64e5lex@quack3> (raw)
In-Reply-To: <76a9b920-0937-7bef-db55-844f0f5f6c1b@i2se.com>
Hi Stefan,
Back from vacation...
On Sun 31-07-22 22:42:56, Stefan Wahren wrote:
> Hi Jan,
>
> Am 28.07.22 um 12:00 schrieb Jan Kara:
> >
> > Also can get filesystem metadata image of your card like:
> > e2image -r <fs-device> - | gzip >/tmp/ext4-image.gz
> >
> > and put it somewhere for download? The image will contain only fs metadata,
> > not data so it should be relatively small and we won't have access to your
> > secrets ;). With the image we'd be able to see how the free space looks
> > like and whether it perhaps does not trigger some pathological behavior.
> i've problems with this. If i try store uncompressed the metadata of the
> second SD card partition (/dev/sdb2 = rootfs) the generated image file is
> nearly big as the whole partition. In compressed state it's 25 MB. Is this
> expected?
Yes, that is expected. The resulting file is a sparse file that contains
only metadata blocks that is the reason why it compresses so well but looks
big.
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2022-08-15 10:35 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-18 13:29 [Regression] ext4: changes to mb_optimize_scan cause issues on Raspberry Pi Stefan Wahren
2022-07-18 13:46 ` [Regression] ext4: changes to mb_optimize_scan cause issues on Raspberry Pi #forregzbot Thorsten Leemhuis
2022-07-24 21:43 ` [Regression] ext4: changes to mb_optimize_scan cause issues on Raspberry Pi Stefan Wahren
2022-07-25 15:07 ` Ojaswin Mujoo
2022-07-25 19:09 ` Stefan Wahren
2022-07-26 6:43 ` Ojaswin Mujoo
2022-07-26 15:54 ` Stefan Wahren
2022-07-28 7:37 ` Thorsten Leemhuis
2022-07-28 10:00 ` Jan Kara
2022-07-29 5:30 ` Stefan Wahren
2022-07-31 20:42 ` Stefan Wahren
2022-08-06 15:23 ` Stefan Wahren
2022-08-14 10:07 ` Stefan Wahren
2022-08-15 10:34 ` Jan Kara [this message]
2022-08-15 11:03 ` Stefan Wahren
2022-08-06 9:50 ` Stefan Wahren
2022-08-16 9:34 ` Jan Kara
2022-08-16 11:25 ` Stefan Wahren
2022-08-16 20:45 ` Stefan Wahren
2022-08-17 5:24 ` Ojaswin Mujoo
2022-08-17 10:57 ` Jan Kara
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