linux-kernel - Re: [PATCH] mm: shmem: fallback to page size splice if large folio has poisoned subpages

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Message-ID: <ZxsRCyBSO-C27Uzn@casper.infradead.org>
Date: Fri, 25 Oct 2024 04:31:23 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc: akpm@...ux-foundation.org, hughd@...gle.com, david@...hat.com,
	wangkefeng.wang@...wei.com, shy828301@...il.com,
	dhowells@...hat.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: shmem: fallback to page size splice if large folio
 has poisoned subpages

On Fri, Oct 25, 2024 at 11:26:39AM +0800, Baolin Wang wrote:
> The tmpfs has already supported the PMD-sized large folios, and splice()
> can not read any subpages if the large folio has a poisoned subpage,
> which is not good as we discussed in previous mail[1].

folios do not have subpages.  folios have pages.  do not use the term
"subpage" anywhere.  ever.