Re: [PATCHv2 1/1] mm: fix unproperly folio_put by changing API in read_pages

[Matthew Wilcox]

On Mon, Apr 01, 2024 at 04:17:34PM +0800, zhaoyang.huang wrote:
> From: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx>
> 
> An VM_BUG_ON in step 9 of [1] could happen as the refcnt is dropped
> unproperly during the procedure of read_pages()->readahead_folio->folio_put.
> This is introduced by commit 9fd472af84ab ("mm: improve cleanup when
> ->readpages doesn't process all pages")'.

This patch is no less bullshit than the last time you posted it.
I explained why here:
https://lore.kernel.org/linux-mm/ZgQRtQ60mrvOUKXo@xxxxxxxxxxxxxxxxxxxx/