Messages in this thread | | | Date | Sat, 6 Aug 2022 17:23:54 +0200 | Subject | Re: [Regression] ext4: changes to mb_optimize_scan cause issues on Raspberry Pi | From | Stefan Wahren <> |
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Hi,
Am 31.07.22 um 22:42 schrieb Stefan Wahren: > 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?
This performance regression is also reproducible with 5.19 kernel (arm64, defconfig) and 64-bit Raspberry Pi OS. Unfortunately the problem with metadata generation is the same, the generated uncompressed file is 15 GB.
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