From: David Laight <david.laight.linux@gmail.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>,
linux-arm-kernel@lists.infradead.org,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Ryan Roberts <ryan.roberts@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Linu Cherian <linu.cherian@arm.com>,
Usama Arif <usama.arif@linux.dev>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC V2 01/14] mm: Abstract printing of pxd_val()
Date: Thu, 21 May 2026 10:42:06 +0100 [thread overview]
Message-ID: <20260521104206.1c7d3fe0@pumpkin> (raw)
In-Reply-To: <74f66e30-ab3d-4352-89ef-1bccc7e9daeb@intel.com>
On Tue, 19 May 2026 07:28:17 -0700
Dave Hansen <dave.hansen@intel.com> wrote:
> On 5/12/26 21:45, Anshuman Khandual wrote:
> > if (!p4d_present(p4d) || p4d_leaf(p4d)) {
> > - pr_alert("pgd:%08llx p4d:%08llx\n", pgdv, p4dv);
> > + pr_alert("pgd:%" __PRIpxx " p4d:%" __PRIpxx "\n",
> > + __PRIpxx_args(pgdv), __PRIpxx_args(p4dv));
> > return;
> > }
>
> That's not the most readable result. Could a printk() format specifier
> make this nicer? Maybe use "%pT"?
>
> pr_alert("pgd:%pT p4d:%pT\n", &pgd, &p4d);
>
> I _think_ it could even get rid of the p??v variables.
>
Adding another %p variant that is only used in a few places just makes
it all harder to read.
Perhaps a local helper that lets you do:
char pdgv_buf[??]:
pr_alert("... %s ...", ... fmt_pdgv(pdgv_buf, pdgv) ...)
might be a reasonable compromise.
-- David
next prev parent reply other threads:[~2026-05-21 9:42 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-13 4:45 [RFC V2 00/14] arm64/mm: Enable 128 bit page table entries Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 01/14] mm: Abstract printing of pxd_val() Anshuman Khandual
2026-05-17 18:57 ` Mike Rapoport
2026-05-19 14:28 ` Dave Hansen
2026-05-20 10:41 ` David Hildenbrand (Arm)
2026-05-21 3:43 ` Anshuman Khandual
2026-05-21 9:42 ` David Laight [this message]
2026-05-13 4:45 ` [RFC V2 02/14] mm: Add read-write accessors for vm_page_prot Anshuman Khandual
2026-05-17 18:59 ` Mike Rapoport
2026-05-13 4:45 ` [RFC V2 03/14] arm64/mm: Convert READ_ONCE() as pmdp_get() while accessing PMD Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 04/14] arm64/mm: Convert READ_ONCE() as pudp_get() while accessing PUD Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 05/14] arm64/mm: Convert READ_ONCE() as p4dp_get() while accessing P4D Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 06/14] arm64/mm: Convert READ_ONCE() as pgdp_get() while accessing PGD Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 07/14] arm64/mm: Route all pgtable reads via pxxval_get() Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 08/14] arm64/mm: Route all pgtable writes via pxxval_set() Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 09/14] arm64/mm: Route all pgtable atomics to central helpers Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 10/14] arm64/mm: Abstract printing of pxd_val() Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 11/14] arm64/mm: Override read-write accessors for vm_page_prot Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 13/14] arm64/mm: Add an abstraction level for tlbi_op Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 14/14] arm64/mm: Add initial support for FEAT_D128 page tables Anshuman Khandual
2026-05-13 9:39 ` [RFC V2 00/14] arm64/mm: Enable 128 bit page table entries Lorenzo Stoakes
2026-05-18 4:20 ` Anshuman Khandual
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