From: Dave Hansen <dave.hansen@intel.com>
To: Mike Rapoport <rppt@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
"Denis V . Lunev" <den@openvz.org>,
Ingo Molnar <mingo@redhat.com>, Juergen Gross <jgross@suse.com>,
Kiryl Shutsemau <kas@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@kernel.org>,
linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH] x86/mm/pat: don't gate cpa_lock on debug_pagealloc_enabled()
Date: Wed, 15 Jul 2026 08:08:04 -0700 [thread overview]
Message-ID: <3e25cb36-6344-4853-ae1e-424df3f24f18@intel.com> (raw)
In-Reply-To: <20260715144519.934289-1-rppt@kernel.org>
On 7/15/26 07:45, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
>
> Dave Hansen says:
> My only question is *why*!?!? Why add extra locking complexity and rules
> to optimize debug_pagealloc, which is already horrendously slow.
>
> Stop gating cpa_lock on debug_pagealloc_enabled() to simplify the code.
Thanks for sending this, Mike! I munged the changelog a bit and applied it.
next prev parent reply other threads:[~2026-07-15 15:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-15 14:45 Mike Rapoport
2026-07-15 15:08 ` Dave Hansen [this message]
2026-07-15 15:10 ` [tip: x86/mm] x86/mm/pat: Don't " tip-bot2 for Mike Rapoport (Microsoft)
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