Re: [PATCH v2 2/3] iotests: Improve mirror-sparse on ext4

2025-05-28 Thread Markus Armbruster
Eric Blake writes: > On Wed, May 28, 2025 at 10:45:35AM -0500, Eric Blake wrote: >> On Fri, May 23, 2025 at 11:27:22AM -0500, Eric Blake wrote: >> > Fiona reported that an ext4 filesystem on top of LVM can sometimes >> > report over-allocation to du (based on the hueristics the filesystem >> > is

Re: [PATCH v2 2/3] iotests: Improve mirror-sparse on ext4

2025-05-28 Thread Eric Blake
On Wed, May 28, 2025 at 10:45:35AM -0500, Eric Blake wrote: > On Fri, May 23, 2025 at 11:27:22AM -0500, Eric Blake wrote: > > Fiona reported that an ext4 filesystem on top of LVM can sometimes > > report over-allocation to du (based on the hueristics the filesystem > > is making while observing the

Re: [PATCH v2 2/3] iotests: Improve mirror-sparse on ext4

2025-05-28 Thread Eric Blake
On Fri, May 23, 2025 at 11:27:22AM -0500, Eric Blake wrote: > Fiona reported that an ext4 filesystem on top of LVM can sometimes > report over-allocation to du (based on the hueristics the filesystem > is making while observing the contents being mirrored); even though > the contents and actual siz

Re: [PATCH v2 2/3] iotests: Improve mirror-sparse on ext4

2025-05-23 Thread Eric Blake
On Fri, May 23, 2025 at 11:27:22AM -0500, Eric Blake wrote: > Fiona reported that an ext4 filesystem on top of LVM can sometimes > report over-allocation to du (based on the hueristics the filesystem and despite my other edits, I still missed fixing my typo on heuristics > is making while observi

[PATCH v2 2/3] iotests: Improve mirror-sparse on ext4

2025-05-23 Thread Eric Blake
Fiona reported that an ext4 filesystem on top of LVM can sometimes report over-allocation to du (based on the hueristics the filesystem is making while observing the contents being mirrored); even though the contents and actual size matched, about 50% of the time the size reported by disk_usage was