test_bitmap: loaded.
test_bitmap: [lib/test_bitmap.c:397] bitmaps contents differ: expected
"1,3-4,9", got "1,3-4,9,65-71,73-79,81-87,89-95,97-99"
test_bitmap: parselist('0-2047:128/256'): 912
test_bitmap: scnprintf("%*pbl", '0-32767'): 5977
test_bitmap: test_bitmap_read_perf: 1191082
test_bitmap: test_bitmap_write_perf: 1270153
test_bitmap: failed 1 out of 208655 tests
On QEMU (pmac32_defconfig) I get:
test_bitmap: loaded.
test_bitmap: parselist('0-2047:128/256'): 2200
test_bitmap: scnprintf("%*pbl", '0-32767'): 26440
test_bitmap: test_bitmap_read_perf: 1819760
test_bitmap: test_bitmap_write_perf: 18189840
test_bitmap: all 208655 tests passed
On QEMU with your confirm I get:
[ 1.162486] test_bitmap: loaded.
[ 1.177069] test_bitmap: [lib/test_bitmap.c:397] bitmaps contents
differ: expected "1,3-4,9", got "1,3-4,9,65-71,73-79,81-87,89-95,97-99"
[ 1.180599] test_bitmap: parselist('0-2047:128/256'): 2920
[ 1.190105] test_bitmap: scnprintf("%*pbl", '0-32767'): 65560
[ 1.427378] test_bitmap: test_bitmap_read_perf: 9546321
[ 1.438769] test_bitmap: test_bitmap_write_perf: 9344481
[ 1.457679] test_bitmap: failed 1 out of 208655 tests
So there is something with your config
Interesting! As I get the same test failure on my Talos II too.
Anyhow, I was able to bisect the issue. Offending commit is:
# git bisect bad
6b5a4b68736798df1031404a2fad06d031253ef7 is the first bad commit
commit 6b5a4b68736798df1031404a2fad06d031253ef7 (HEAD)
Author: Andy Shevchenko <[email protected]>
Date: Thu Feb 26 12:16:44 2026 +0100
bitmap: Add test for out-of-boundary modifications for scatter & gather
Make sure that bitmap_scatter() and bitmap_gather() do not modify
the bits outside of the given nbits span.
Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Yury Norov <[email protected]>
lib/test_bitmap.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
Reverting this commit on top of v7.2-rc2 lets the test pass:
test_bitmap: loaded.
test_bitmap: parselist('0-2047:128/256'): 888
test_bitmap: scnprintf("%*pbl", '0-32767'): 6074
test_bitmap: test_bitmap_read_perf: 1190938
test_bitmap: test_bitmap_write_perf: 1259471
test_bitmap: all 208655 tests passed
Your hint about my config made me check a few options and I found the
offending one, which is INIT_STACK_ALL_PATTERN=y. On a kernel built with
INIT_STACK_ALL_ZERO=y the issue does not show up.
Regards,
Erhard
