Subject: `tests/store-deduplication.scm` fails on Asahi Linux

From: Lukas Navickas <[email-masked]>
Date: Fri, 13 Dec 2024 21:18:28 +0000

`copy-file/deduplicate, sparse files` tests fail on asahi linux.

i do not have adequate grounding on this topic, but i made a few empirical tests changing the inputs.

the original tests create a file in `/tmp`, and fail.
if instead the file is on disk, some(all?) tests pass.
if instead the inputs are changed from 2*4096 to 2*16834, some tests pass.

tmpfs on apple silicon has a block size of 16834. i'm guessing this corresponds to its RAM page size.

i'm inferring that this test has a hidden dependency: the block size of the underlying filesystem that contains the tested files. it may be desirable to account for this dependency.