From: Peter Xu <peterx@redhat.com>
To: David Hildenbrand <david@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org,
intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-trace-kernel@vger.kernel.org,
Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Tvrtko Ursulin <tursulin@ursulin.net>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
Andrew Morton <akpm@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>, Jann Horn <jannh@google.com>,
Pedro Falcato <pfalcato@suse.de>
Subject: Re: [PATCH v1 02/11] mm: convert track_pfn_insert() to pfnmap_sanitize_pgprot()
Date: Tue, 29 Apr 2025 12:36:31 -0400 [thread overview]
Message-ID: <aBEAD02B5CIzonwU@x1.local> (raw)
In-Reply-To: <4a57e772-51f5-4341-a249-dd1b8fcf23b0@redhat.com>
On Tue, Apr 29, 2025 at 06:25:06PM +0200, David Hildenbrand wrote:
> I do wonder why we even have to lookup the memtype again if the caller
> apparently reserved it (which implied checking it). All a bit weird.
Maybe it's because the memtype info isn't always visible to the upper
layers, e.g. default pci_iomap() for MMIOs doesn't need to specify anything
on cache mode. There's some pci_iomap_wc() variance, but still looks like
only the internal has full control..
--
Peter Xu
next prev parent reply other threads:[~2025-04-29 16:36 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-25 8:17 [PATCH v1 00/11] mm: rewrite pfnmap tracking and remove VM_PAT David Hildenbrand
2025-04-25 8:17 ` [PATCH v1 01/11] x86/mm/pat: factor out setting cachemode into pgprot_set_cachemode() David Hildenbrand
2025-04-28 16:16 ` Lorenzo Stoakes
2025-04-28 16:19 ` David Hildenbrand
2025-04-25 8:17 ` [PATCH v1 02/11] mm: convert track_pfn_insert() to pfnmap_sanitize_pgprot() David Hildenbrand
2025-04-25 19:31 ` Peter Xu
2025-04-25 19:48 ` David Hildenbrand
2025-04-25 23:59 ` Peter Xu
2025-04-28 14:58 ` David Hildenbrand
2025-04-28 16:21 ` Peter Xu
2025-04-28 20:37 ` David Hildenbrand
2025-04-29 13:44 ` Peter Xu
2025-04-29 16:25 ` David Hildenbrand
2025-04-29 16:36 ` Peter Xu [this message]
2025-04-25 19:56 ` David Hildenbrand
2025-04-25 8:17 ` [PATCH v1 03/11] x86/mm/pat: introduce pfnmap_track() and pfnmap_untrack() David Hildenbrand
2025-04-28 16:53 ` Lorenzo Stoakes
2025-04-28 17:12 ` David Hildenbrand
2025-04-28 18:58 ` Lorenzo Stoakes
2025-04-25 8:17 ` [PATCH v1 04/11] mm/memremap: convert to pfnmap_track() + pfnmap_untrack() David Hildenbrand
2025-04-25 20:00 ` Peter Xu
2025-04-25 20:14 ` David Hildenbrand
2025-04-28 16:54 ` Lorenzo Stoakes
2025-04-28 17:07 ` Lorenzo Stoakes
2025-04-25 8:17 ` [PATCH v1 05/11] mm: convert VM_PFNMAP tracking " David Hildenbrand
2025-04-25 20:23 ` Peter Xu
2025-04-25 20:36 ` David Hildenbrand
2025-04-28 16:08 ` Peter Xu
2025-04-28 16:16 ` David Hildenbrand
2025-04-28 16:24 ` Peter Xu
2025-04-28 17:23 ` David Hildenbrand
2025-04-28 19:37 ` Lorenzo Stoakes
2025-04-28 19:57 ` Suren Baghdasaryan
2025-04-28 20:23 ` David Hildenbrand
2025-04-28 20:19 ` David Hildenbrand
2025-04-28 19:38 ` Lorenzo Stoakes
2025-04-28 20:00 ` Suren Baghdasaryan
2025-04-28 20:21 ` David Hildenbrand
2025-04-28 20:10 ` Lorenzo Stoakes
2025-05-05 13:00 ` David Hildenbrand
2025-05-07 13:25 ` David Hildenbrand
2025-05-07 14:27 ` Lorenzo Stoakes
2025-04-25 8:17 ` [PATCH v1 06/11] x86/mm/pat: remove old pfnmap tracking interface David Hildenbrand
2025-04-28 20:12 ` Lorenzo Stoakes
2025-04-25 8:17 ` [PATCH v1 07/11] mm: remove VM_PAT David Hildenbrand
2025-04-28 20:16 ` Lorenzo Stoakes
2025-04-25 8:17 ` [PATCH v1 08/11] x86/mm/pat: remove strict_prot parameter from reserve_pfn_range() David Hildenbrand
2025-04-28 20:18 ` Lorenzo Stoakes
2025-04-25 8:17 ` [PATCH v1 09/11] x86/mm/pat: remove MEMTYPE_*_MATCH David Hildenbrand
2025-04-28 20:23 ` Lorenzo Stoakes
2025-05-05 12:10 ` David Hildenbrand
2025-05-06 9:30 ` Lorenzo Stoakes
2025-04-25 8:17 ` [PATCH v1 10/11] drm/i915: track_pfn() -> "pfnmap tracking" David Hildenbrand
2025-04-28 20:23 ` Lorenzo Stoakes
2025-04-25 8:17 ` [PATCH v1 11/11] mm/io-mapping: " David Hildenbrand
2025-04-28 16:06 ` Lorenzo Stoakes
2025-04-28 16:14 ` David Hildenbrand
2025-04-25 8:54 ` [PATCH v1 00/11] mm: rewrite pfnmap tracking and remove VM_PAT Ingo Molnar
2025-04-25 9:27 ` David Hildenbrand
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