From: Andreas Hindborg <a.hindborg@kernel.org>
To: Danilo Krummrich <dakr@kernel.org>
Cc: "Miguel Ojeda" <ojeda@kernel.org>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <lossin@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"Trevor Gross" <tmgross@umich.edu>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
"Uladzislau Rezki" <urezki@gmail.com>,
rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] rust: alloc: add GFP_NOIO flag
Date: Wed, 28 Jan 2026 21:33:27 +0100 [thread overview]
Message-ID: <87a4xxsciw.fsf@t14s.mail-host-address-is-not-set> (raw)
In-Reply-To: <DG0GX23ANI54.2PQM2BL2IKRLL@kernel.org>
"Danilo Krummrich" <dakr@kernel.org> writes:
> On Wed Jan 28, 2026 at 7:37 PM CET, Andreas Hindborg wrote:
>> + /// [`GFP_NOIO`] will use direct reclaim to discard clean pages or slab
>> + /// pages that do not require the starting of any physical IO.
>> + pub const GFP_NOIO: Flags = Flags(bindings::GFP_NOIO);
>
> How do you use this? What about abstractions for memalloc_noio_{save,restore}()
> instead?
I use it to allocate memory for backing storage in rust null block. The
allocation is done during processing of disk IO:
page: Page::alloc_page(GFP_NOIO | __GFP_ZERO)?,
Best regards,
Andreas Hindborg
prev parent reply other threads:[~2026-01-28 20:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-28 18:37 Andreas Hindborg
2026-01-28 19:26 ` Danilo Krummrich
2026-01-28 20:33 ` Andreas Hindborg [this message]
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