From: David Hildenbrand <david@redhat.com>
To: Dave Hansen <dave.hansen@intel.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Ryan Roberts <ryan.roberts@arm.com>,
"Mike Rapoport (IBM)" <rppt@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
x86@kernel.org, linux-m68k@lists.linux-m68k.org,
linux-fsdevel@vger.kernel.org, kasan-dev@googlegroups.com,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: Re: [PATCH V2 2/7] x86/mm: Drop page table entry address output from pxd_ERROR()
Date: Tue, 17 Sep 2024 13:31:37 +0200 [thread overview]
Message-ID: <5af75d55-f65d-4c3d-be85-402386ece04d@redhat.com> (raw)
In-Reply-To: <be3a44a3-7f33-4d6b-8348-ed6b8c3e7b49@intel.com>
On 17.09.24 13:19, Dave Hansen wrote:
> On 9/17/24 03:22, David Hildenbrand wrote:
>> Not a big fan of all these "bad PTE" thingies ...
>
> In general?
In general, after I learned that pmd_bad() fires on perfectly fine
pmd_large() entries, which makes things like pmd_none_or_clear_bad()
absolutely dangerous to use in code where we could have THPs ...
Consequently, we stopped using them in THP code, so what's the whole
point of having them ...
>
> Or not a big fan of the fact that every architecture has their own
> (mostly) copied-and-pasted set?
Well, that most certainly as well :)
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2024-09-17 11:31 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-17 7:31 [PATCH V2 0/7] mm: Use pxdp_get() for accessing page table entries Anshuman Khandual
2024-09-17 7:31 ` [PATCH V2 1/7] m68k/mm: Change pmd_val() Anshuman Khandual
2024-09-17 8:40 ` Ryan Roberts
2024-09-17 10:20 ` David Hildenbrand
2024-09-17 10:27 ` Ryan Roberts
2024-09-17 10:30 ` David Hildenbrand
2024-09-17 7:31 ` [PATCH V2 2/7] x86/mm: Drop page table entry address output from pxd_ERROR() Anshuman Khandual
2024-09-17 10:22 ` David Hildenbrand
2024-09-17 11:19 ` Dave Hansen
2024-09-17 11:25 ` Anshuman Khandual
2024-09-17 11:31 ` David Hildenbrand [this message]
2024-09-17 7:31 ` [PATCH V2 3/7] mm: Use ptep_get() for accessing PTE entries Anshuman Khandual
2024-09-17 8:44 ` Ryan Roberts
2024-09-17 10:28 ` David Hildenbrand
2024-09-18 6:32 ` Anshuman Khandual
2024-09-19 8:04 ` David Hildenbrand
2024-09-19 9:20 ` Anshuman Khandual
2024-09-17 7:31 ` [PATCH V2 4/7] mm: Use pmdp_get() for accessing PMD entries Anshuman Khandual
2024-09-17 10:05 ` Ryan Roberts
2024-09-18 18:57 ` kernel test robot
2024-09-19 7:21 ` Anshuman Khandual
2024-09-18 19:07 ` kernel test robot
2024-09-19 7:12 ` Anshuman Khandual
2024-09-17 7:31 ` [PATCH V2 5/7] mm: Use pudp_get() for accessing PUD entries Anshuman Khandual
2024-09-17 7:31 ` [PATCH V2 6/7] mm: Use p4dp_get() for accessing P4D entries Anshuman Khandual
2024-09-17 7:31 ` [PATCH V2 7/7] mm: Use pgdp_get() for accessing PGD entries Anshuman Khandual
2024-09-18 20:30 ` kernel test robot
2024-09-19 7:55 ` Anshuman Khandual
2024-09-19 9:11 ` Russell King (Oracle)
2024-09-19 15:48 ` Ryan Roberts
2024-09-19 17:06 ` Russell King (Oracle)
2024-09-19 17:49 ` Ryan Roberts
2024-09-19 20:25 ` Russell King (Oracle)
2024-09-20 6:57 ` Ryan Roberts
2024-09-20 9:47 ` Russell King (Oracle)
2024-09-23 15:21 ` Ryan Roberts
2024-09-25 10:05 ` [PATCH V2 0/7] mm: Use pxdp_get() for accessing page table entries Christophe Leroy
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