From: Gregory Price <gourry@gourry.net>
To: Brendan Jackman <jackmanb@google.com>
Cc: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>, Wei Xu <weixugc@google.com>,
Johannes Weiner <hannes@cmpxchg.org>, Zi Yan <ziy@nvidia.com>,
Lorenzo Stoakes <ljs@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org,
rppt@kernel.org, Sumit Garg <sumit.garg@oss.qualcomm.com>,
derkling@google.com, reijiw@google.com,
Will Deacon <will@kernel.org>,
rientjes@google.com, "Kalyazin, Nikita" <kalyazin@amazon.co.uk>,
patrick.roy@linux.dev, "Itazuri, Takahiro" <itazur@amazon.co.uk>,
Andy Lutomirski <luto@kernel.org>,
David Kaplan <david.kaplan@amd.com>,
Thomas Gleixner <tglx@kernel.org>, Yosry Ahmed <yosry@kernel.org>
Subject: Re: [PATCH v2 18/22] mm/page_alloc: introduce ALLOC_NOBLOCK
Date: Fri, 15 May 2026 11:52:00 -0400 [thread overview]
Message-ID: <agdBIDPhJGRpket2@gourry-fedora-PF4VCD3F> (raw)
In-Reply-To: <DIJAH8TVP33G.2YWJ4Z0KO0PZJ@google.com>
On Fri, May 15, 2026 at 01:36:43PM +0000, Brendan Jackman wrote:
> On Wed May 13, 2026 at 9:43 AM UTC, Vlastimil Babka (SUSE) wrote:
> >
> > Is it safe to just combine them? You come with ALLOC_WMARK_LOW and combine
> > with ALLOC_WMARK_MIN from gfp_to_alloc_flags() but these are not bit flags,
> > I think you end up with ALLOC_WMARK_LOW effectively.
>
> Ah, thanks, I do remember thinking about this and deciding that it was
> safe but I probably just misunderstood the watermark code.
>
> This makes me a bit more attracted to the idea of a struct like Gregory
> suggested in [1]. Then this could be captured in the type system.
>
This might actually be a good precursor before pulling alloc_context any
further out. Since there's multiple paths into the lower layers with
alloc_context, maybe there should already be a sanity check of the alloc
flags anyway.
~Gregory
next prev parent reply other threads:[~2026-05-15 15:52 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-20 18:23 [PATCH v2 00/22] mm: Add __GFP_UNMAPPED Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 01/22] x86/mm: split out preallocate_sub_pgd() Brendan Jackman
2026-03-20 19:42 ` Dave Hansen
2026-03-23 11:01 ` Brendan Jackman
2026-03-24 15:27 ` Borislav Petkov
2026-03-25 13:28 ` Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 02/22] x86/mm: Generalize LDT remap into "mm-local region" Brendan Jackman
2026-03-20 19:47 ` Dave Hansen
2026-03-23 12:01 ` Brendan Jackman
2026-03-23 12:57 ` Brendan Jackman
2026-03-25 14:23 ` Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 03/22] x86/tlb: Expose some flush function declarations to modules Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 04/22] mm: Create flags arg for __apply_to_page_range() Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 05/22] mm: Add more flags " Brendan Jackman
2026-03-26 16:14 ` Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 06/22] x86/mm: introduce the mermap Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 07/22] mm: KUnit tests for " Brendan Jackman
2026-03-24 8:00 ` kernel test robot
2026-03-20 18:23 ` [PATCH v2 08/22] mm: introduce for_each_free_list() Brendan Jackman
2026-05-11 13:46 ` Vlastimil Babka (SUSE)
2026-03-20 18:23 ` [PATCH v2 09/22] mm/page_alloc: don't overload migratetype in find_suitable_fallback() Brendan Jackman
2026-05-11 13:51 ` Vlastimil Babka (SUSE)
2026-05-11 16:44 ` Brendan Jackman
2026-05-11 16:53 ` Vlastimil Babka (SUSE)
2026-03-20 18:23 ` [PATCH v2 10/22] mm: introduce freetype_t Brendan Jackman
2026-05-11 15:34 ` Vlastimil Babka (SUSE)
2026-05-11 16:49 ` Brendan Jackman
2026-05-11 16:58 ` Vlastimil Babka (SUSE)
2026-05-11 18:17 ` Vlastimil Babka (SUSE)
2026-05-11 18:26 ` Vlastimil Babka (SUSE)
2026-03-20 18:23 ` [PATCH v2 11/22] mm: move migratetype definitions to freetype.h Brendan Jackman
2026-05-11 15:35 ` Vlastimil Babka (SUSE)
2026-03-20 18:23 ` [PATCH v2 12/22] mm: add definitions for allocating unmapped pages Brendan Jackman
2026-05-11 18:01 ` Vlastimil Babka (SUSE)
2026-03-20 18:23 ` [PATCH v2 13/22] mm: rejig pageblock mask definitions Brendan Jackman
2026-05-11 18:07 ` Vlastimil Babka (SUSE)
2026-03-20 18:23 ` [PATCH v2 14/22] mm: encode freetype flags in pageblock flags Brendan Jackman
2026-05-11 18:29 ` Vlastimil Babka (SUSE)
2026-03-20 18:23 ` [PATCH v2 15/22] mm/page_alloc: remove ifdefs from pindex helpers Brendan Jackman
2026-05-11 18:30 ` Vlastimil Babka (SUSE)
2026-05-12 9:49 ` Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 16/22] mm/page_alloc: separate pcplists by freetype flags Brendan Jackman
2026-05-13 8:46 ` Vlastimil Babka (SUSE)
2026-03-20 18:23 ` [PATCH v2 17/22] mm/page_alloc: rename ALLOC_NON_BLOCK back to _HARDER Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 18/22] mm/page_alloc: introduce ALLOC_NOBLOCK Brendan Jackman
2026-05-13 9:43 ` Vlastimil Babka (SUSE)
2026-05-15 13:36 ` Brendan Jackman
2026-05-15 15:52 ` Gregory Price [this message]
2026-03-20 18:23 ` [PATCH v2 19/22] mm/page_alloc: implement __GFP_UNMAPPED allocations Brendan Jackman
2026-05-13 15:43 ` Vlastimil Babka (SUSE)
2026-05-15 16:46 ` Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 20/22] mm/page_alloc: implement __GFP_UNMAPPED|__GFP_ZERO allocations Brendan Jackman
2026-05-13 17:00 ` Vlastimil Babka (SUSE)
2026-05-15 16:50 ` Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 21/22] mm: Minimal KUnit tests for some new page_alloc logic Brendan Jackman
2026-03-20 18:23 ` [PATCH v2 22/22] mm/secretmem: Use __GFP_UNMAPPED when available Brendan Jackman
2026-03-31 14:40 ` Brendan Jackman
2026-05-13 16:17 ` [PATCH v2 00/22] mm: Add __GFP_UNMAPPED Gregory Price
2026-05-13 17:14 ` Brendan Jackman
2026-05-13 17:28 ` Gregory Price
2026-05-13 17:38 ` Vlastimil Babka (SUSE)
2026-05-13 17:59 ` Gregory Price
2026-05-15 9:31 ` Brendan Jackman
2026-05-15 16:04 ` Gregory Price
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