From: Matthew Wilcox <willy@infradead.org>
To: Yosry Ahmed <yosryahmed@google.com>
Cc: kernel test robot <oliver.sang@intel.com>,
Usama Arif <usamaarif642@gmail.com>,
oe-lkp@lists.linux.dev, lkp@intel.com,
Linux Memory Management List <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Chengming Zhou <chengming.zhou@linux.dev>,
Nhat Pham <nphamcs@gmail.com>,
David Hildenbrand <david@redhat.com>,
"Huang, Ying" <ying.huang@intel.com>,
Hugh Dickins <hughd@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Shakeel Butt <shakeel.butt@linux.dev>,
Andi Kleen <ak@linux.intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [linux-next:master] [mm] 0fa2857d23: WARNING:at_mm/page_alloc.c:#__alloc_pages_noprof
Date: Mon, 24 Jun 2024 19:56:20 +0100 [thread overview]
Message-ID: <ZnnBVBItTNWZE42u@casper.infradead.org> (raw)
In-Reply-To: <CAJD7tkbF9NwKa4q5J0xq1oG6EkTDLz8UcbekSfP+DYfoDSqRhQ@mail.gmail.com>
On Mon, Jun 24, 2024 at 11:53:30AM -0700, Yosry Ahmed wrote:
> After a page is swapped out during reclaim, __remove_mapping() will
> call __delete_from_swap_cache() to replace the swap cache entry with a
> shadow entry (which is an xa_value).
Special entries are disjoint from shadow entries. Shadow entries have
the last two bits as 01 or 11 (are congruent to 1 or 3 modulo 4).
Special entries have values below 4096 which end in 10 (are congruent
to 2 modulo 4).
next prev parent reply other threads:[~2024-06-24 18:56 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-24 8:49 [linux-next:master] [mm] 0fa2857d23: WARNING:at_mm/page_alloc.c:#__alloc_pages_noprof kernel test robot
2024-06-24 12:05 ` Yosry Ahmed
2024-06-24 13:06 ` Usama Arif
2024-06-24 15:26 ` Hugh Dickins
2024-06-24 15:39 ` Usama Arif
2024-06-24 15:55 ` Hugh Dickins
2024-06-24 16:56 ` Yosry Ahmed
2024-06-24 17:26 ` Usama Arif
2024-06-24 17:31 ` Yosry Ahmed
2024-06-24 18:26 ` Usama Arif
2024-06-27 11:05 ` Usama Arif
2024-06-24 18:33 ` Matthew Wilcox
2024-06-24 18:50 ` Usama Arif
2024-06-24 18:53 ` Yosry Ahmed
2024-06-24 18:54 ` Matthew Wilcox
2024-06-24 18:53 ` Yosry Ahmed
2024-06-24 18:56 ` Matthew Wilcox [this message]
2024-06-24 18:57 ` Yosry Ahmed
2024-06-24 19:26 ` Matthew Wilcox
2024-06-24 19:34 ` Yosry Ahmed
2024-06-24 19:50 ` Matthew Wilcox
2024-06-24 20:39 ` Shakeel Butt
2024-06-24 20:51 ` Matthew Wilcox
2024-06-24 21:02 ` Shakeel Butt
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