From: Stefan Roesch <shr@devkernel.io>
To: Matthew Wilcox <willy@infradead.org>
Cc: kernel-team@fb.com, akpm@linux-foundation.org,
hannes@cmpxchg.org, riel@surriel.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
stable@vger.kernel.org
Subject: Re: [PATCH v2] mm: Fix for negative counter: nr_file_hugepages
Date: Wed, 08 Nov 2023 09:09:55 -0800 [thread overview]
Message-ID: <87leb8npcd.fsf@devkernel.io> (raw)
In-Reply-To: <ZUqRia1Ww0+wNfKr@casper.infradead.org>
Matthew Wilcox <willy@infradead.org> writes:
> On Tue, Nov 07, 2023 at 10:18:05AM -0800, Stefan Roesch wrote:
>> +++ b/mm/huge_memory.c
>> @@ -2740,7 +2740,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
>> if (folio_test_swapbacked(folio)) {
>> __lruvec_stat_mod_folio(folio, NR_SHMEM_THPS,
>> -nr);
>> - } else {
>> + } else if (folio_test_pmd_mappable(folio)) {
>> __lruvec_stat_mod_folio(folio, NR_FILE_THPS,
>> -nr);
>> filemap_nr_thps_dec(mapping);
>
> As I said, we also need the folio_test_pmd_mappable() for swapbacked.
> Not because there's currently a problem, but because we don't leave
> landmines for other people to trip over in future!
I'll add it in the next version.
prev parent reply other threads:[~2023-11-08 17:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-07 18:18 [PATCH v2] mm: Fix for negative counter: nr_file_hugepages Stefan Roesch
2023-11-07 19:35 ` Matthew Wilcox
2023-11-07 20:06 ` Johannes Weiner
2023-11-07 20:07 ` Matthew Wilcox
2023-11-07 20:20 ` Johannes Weiner
2023-11-08 17:09 ` Stefan Roesch [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87leb8npcd.fsf@devkernel.io \
--to=shr@devkernel.io \
--cc=akpm@linux-foundation.org \
--cc=hannes@cmpxchg.org \
--cc=kernel-team@fb.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=riel@surriel.com \
--cc=stable@vger.kernel.org \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).