Filipe Manana wrote on Thu, Jun 30, 2022 at 01:51:24PM +0100: > > Please ask if there's any infos I could get you. > > Ok, maybe it's page fault related or there's something else besides page faults > involved. > > Can you dump the subvolume tree like this: > > btrfs inspect-internal dump-tree -t 5 /dev/sda 2>&1 | xz -9 > dump.xz > > Here the 5 is the ID of the default subvolume. If the test file is on > a different subvolume, you'll need to replace 5 with the subvolume's ID. Sure thing. It's 2MB compressed: https://gaia.codewreck.org/local/tmp/dump-tree.xz > This is just to look at the file extent layout. > Also, then tell me what's the inode number of the file (or just its name, > and I'll find out its inode number), and an example file offset and read > length that triggers a short read, so that I know where to look at. There's just a single file in that subvolume, inode 257 > And btw, that dump-tree command will dump all file names, directory names > and xattr names and values (if they are human readable) - so if privacy is > a concern here, just pass --hide-names to the dump-tree command. (thanks for the warning) -- Dominique
