On 29/06/2021 19:20, Josef Bacik wrote:

On 6/29/21 1:00 PM, Krzysztof Kozlowski wrote:

quoted

Dear BTRFS folks,

I am hitting a potential regression of btrfs, visible only with
fallocate05 test from LTP (Linux Test Project) only on 32+ core Azure
instances (x86_64).

Tested:
v5.8 (Ubuntu with our stable patches): PASS
v5.11 (Ubuntu with our stable patches): FAIL
v5.13 mainline: FAIL

PASS means test passes on all instances
FAIL means test passes on other instance types (e.g. 4 or 16 core) but
fails on 32 and 64 core instances (did not test higher),
e.g.: Standard_F32s_v2, Standard_F64s_v2, Standard_D32s_v3,
Standard_E32s_v3

Reproduction steps:
git clone https://github.com/linux-test-project/ltp.git
cd ltp
./build.sh && make install -j8
cd ../ltp-install
sudo ./runltp -f syscalls -s fallocate05

This thing keeps trying to test ext2, how do I make it only test btrfs?  Thanks,

It tests all available file systems, just wait till it gets to btrfs. I
don't know how to limit it only to one file system.


Best regards,
Krzysztof