From: "Brendan Jackman" <brendan.jackman@linux.dev>
To: "Gupta, Pankaj" <pankaj.gupta@amd.com>,
"Brendan Jackman" <jackmanb@google.com>,
"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>,
"Vlastimil Babka" <vbabka@kernel.org>,
"Wei Xu" <weixugc@google.com>,
"Johannes Weiner" <hannes@cmpxchg.org>, "Zi Yan" <ziy@nvidia.com>,
"Lorenzo Stoakes" <ljs@kernel.org>
Cc: <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 09/22] mm/page_alloc: don't overload migratetype in find_suitable_fallback()
Date: Fri, 12 Jun 2026 14:44:31 +0000 [thread overview]
Message-ID: <DJ75GER4WC9G.3PEDYJQ5T0EWL@linux.dev> (raw)
In-Reply-To: <646fd09b-0dfe-4646-997f-22e464bca024@amd.com>
On Fri Jun 12, 2026 at 1:24 PM UTC, Pankaj Gupta wrote:
>
>> This function currently returns a signed integer that encodes status
>> in-band, as negative numbers, along with a migratetype.
>>
>> This function is about to be updated to a mode where this in-band
>> signaling no longer makes sense. Therefore, switch to a more
>> explicit/verbose style that encodes the status and migratetype
>> separately.
>>
>> In the spirit of making things more explicit, also create an enum to
>> avoid using magic integer literals with special meanings. This enables
>> documenting the values at their definition instead of in one of the
>> callers.
>>
>> Signed-off-by: Brendan Jackman <jackmanb@google.com>
>
> Seems independent patch with no functional change.
>
> Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Thanks Pankaj - also BTW this and some other patches were already split
out into a separate series and they are now in mm-unstable:
https://lore.kernel.org/all/20260503-x86-init-cleanup-v2-0-bb690bd2477c@google.com/
next prev parent reply other threads:[~2026-06-12 14:44 UTC|newest]
Thread overview: 72+ 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)
2026-06-12 13:24 ` Gupta, Pankaj
2026-06-12 14:44 ` Brendan Jackman [this message]
2026-06-12 15:53 ` Gupta, Pankaj
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)
2026-05-18 0:00 ` Brendan Jackman
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
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
2026-05-29 15:02 ` Brendan Jackman
2026-06-01 8:50 ` Vlastimil Babka (SUSE)
2026-06-11 14:46 ` Brendan Jackman
2026-06-01 8:59 ` Vlastimil Babka (SUSE)
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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