From: Andrew Morton <akpm@linux-foundation.org>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: vbabka@suse.cz, surenb@google.com, mhocko@suse.com,
jackmanb@google.com, hannes@cmpxchg.org, bp@alien8.de,
tglx@linutronix.de, david@redhat.com, ast@kernel.org,
linux-mm@kvack.org, linux-coco@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] mm/page_alloc: Ensure try_alloc_pages() plays well with unaccepted memory
Date: Tue, 6 May 2025 17:00:34 -0700 [thread overview]
Message-ID: <20250506170034.2c6cb08808e60772c207233f@linux-foundation.org> (raw)
In-Reply-To: <20250506112509.905147-2-kirill.shutemov@linux.intel.com>
On Tue, 6 May 2025 14:25:08 +0300 "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
> try_alloc_pages() will not attempt to allocate memory if the system has
> *any* unaccepted memory. Memory is accepted as needed and can remain in
> the system indefinitely, causing the interface to always fail.
>
> Rather than immediately giving up, attempt to use already accepted
> memory on free lists.
>
> Pass 'alloc_flags' to cond_accept_memory() and do not accept new memory
> for ALLOC_TRYLOCK requests.
What are the userspace-visible effects, please?
Was the omission of cc:stable intentional? I cannot locally determine
this without the above info.
If the cc:stable omission was indeed intentional then it would be better
if this series was presented as two standalone patches.
next prev parent reply other threads:[~2025-05-07 0:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250506112509.905147-1-kirill.shutemov@linux.intel.com>
[not found] ` <20250506112509.905147-3-kirill.shutemov@linux.intel.com>
2025-05-06 12:43 ` [PATCH 2/2] mm/page_alloc: Fix race condition in unaccepted memory handling Borislav Petkov
[not found] ` <20250506112509.905147-2-kirill.shutemov@linux.intel.com>
2025-05-06 13:20 ` [PATCH 1/2] mm/page_alloc: Ensure try_alloc_pages() plays well with unaccepted memory Brendan Jackman
2025-05-06 13:34 ` Kirill A. Shutemov
2025-05-07 15:27 ` Brendan Jackman
2025-05-06 17:18 ` Alexei Starovoitov
2025-05-06 19:00 ` Kirill A. Shutemov
2025-05-06 22:05 ` Alexei Starovoitov
2025-05-07 11:13 ` Kirill A. Shutemov
2025-05-07 0:00 ` Andrew Morton [this message]
2025-05-07 11:31 ` Kirill A. Shutemov
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