Re: [PATCH 0/2] ext4: fix a infinite loop in do_writepages after online resizing

Theodore Ts'o
2022-11-29T21:13:25Z

On Wed, 17 Aug 2022 21:26:59 +0800, Baokun Li wrote:
> We got a issue: the ext4 writeback process was stuck in do_writepages and
> do_writepages kept retrying. However, '-ENOMEM' is returned each time, even
> if there is still free memory on the current machine.
>
> We find that the direct cause of this issue is that the bg_inode_table_hi
> in the group descriptor is written to an incorrect value, which causes the
> inode block found through the inode table to exceed the end_ block。Then,
> sb_getblk always returns null, __ext4_get_inode_loc returns `-ENOMEM`,
> and do_writepages keeps retrying.
>
> [...]

Applied, thanks!

[1/2] ext4: fix GDT corruption after online resizing with bigalloc enable and blocksize is 1024
commit: 496fb12f8e236f303de6bc73a0334dd50c4eb64a
[2/2] ext4: add inode table check in __ext4_get_inode_loc to aovid possible infinite loop
commit: bfb0625e8e86f8797264b1c7d10e146afe243d23

Best regards,
--
Theodore Ts'o <tytso@mit.edu>