18 Dec
2023
18 Dec
'23
3:09 p.m.
On Mon 18-12-23 15:43:42, Jan Kara wrote:
On Mon 18-12-23 22:18:14, Baokun Li wrote:
When bb_free is not 0 but bb_fragments is 0, return directly to avoid system crash due to division by zero.
How could this possibly happen? bb_fragments is the number of free space extents and bb_free is the number of free blocks. No free space extents => no free blocks seems pretty obvious? You can see the logic in ext4_mb_generate_buddy()...
Oh, I see. This is probably about "bitmap corrupted case". But still both allocation and freeing of blocks shouldn't operate on bitmaps marked as corrupted so this should not happen?
Honza
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Jan Kara jack@suse.com
SUSE Labs, CR