gazagnaire.org
OCI-oriented build engine
builder: size the xattr shrink-race value to the inode xattr limit
The shrink-race test set a 16 KiB extended attribute, but ext4 keeps
an inode's xattrs in a single block, so the set failed with ENOSPC
on the container's overlay before the race ran -- it surfaced once
the idmap deadlock fix let the suite reach this test. A 2 KiB value
fits the per-inode capacity while still being large enough that a
torn read (the sized length returned with a stale tail) would be
caught, so the assertion is unchanged. Verified green in the Linux
container.
author
Thomas Gazagnaire
date
(Jun 10, 2026, 5:23 PM -0700)
commit
d853fef1
d853fef1bd959ad18de8e1e0e36947c89a16b1d2
parent
35bc68bb
35bc68bb481b8e6ef960833dd8b2fee40ddcaea3
+5
-1
+5
-1
test/test_xattr.ml
+5
-1
test/test_xattr.ml
···
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let shrink_race_returns_none () =
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let path = Filename.temp_file "xattr_race" ".bin" in
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let name = "user.merlint.race" in
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let large = String.make 16384 'L' in
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(* Large enough that a torn read -- the sized length returned with a stale
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tail -- would be caught, but within the per-inode xattr capacity of common
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filesystems: ext4 keeps an inode's extended attributes in a single block,
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so a multi-kilobyte value fails to set with ENOSPC. *)
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let large = String.make 2048 'L' in
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let small = "s" in
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Fun.protect
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~finally:(fun () -> try Sys.remove path with Sys_error _ -> ())