Re: [PATCH v2 1/5] mm/memory-failure: keep the folio, not the poisoned subpage, locked across split

From: Kiryl Shutsemau

Date: Tue Jul 14 2026 - 12:43:08 EST


On Tue, Jul 14, 2026 at 11:44:39AM -0400, Zi Yan wrote:
> There is an alternative, only igrab() when @lock_at is at or beyond the EOF,
> as I was bouncing ideas with Codex.

I saw this option too, but I wound rather not go this path.

iput() still can lead to inode eviction an bunch of random filesystem
complexity under us. I don't think we want to think about other
fs-related locking issues in split context.

--
Kiryl Shutsemau / Kirill A. Shutemov