From: "Jürgen Groß" <jgross@suse.com>
To: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Arnd Bergmann <arnd@arndb.de>,
linux-kernel@vger.kernel.org, x86@kernel.org,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
kernel-team@meta.com
Subject: Re: [PATCH] x86,spinlock: make disabling virt_spin_lock_key contingent on CONFIG_PARAVIRT
Date: Tue, 16 Jul 2024 11:41:23 +0200 [thread overview]
Message-ID: <3e8f7fd6-72d1-41dd-a7d9-914d7f73c46c@suse.com> (raw)
In-Reply-To: <20240715131853.313c3bae@imladris.surriel.com>
On 15.07.24 19:18, Rik van Riel wrote:
> The existence of virt_spin_lock_key is contingent only on CONFIG_PARAVIRT, not
> on CONFIG_PARAVIRT_SPINLOCKS.
>
> As a result, a kernel with CONFIG_PARAVIRT enabled, but CONFIG_PARAVIRT_SPINLOCKS
> disabled will end up disabling queued spinlocks when running on bare metal.
>
> Making the disabling of virt_spin_lock_key contingent on CONFIG_PARAVIRT, which
> controls whether the key exists, results in queued spinlocks being enabled on
> bare metal again.
>
> Signed-off-by: Rik van Riel <riel@surriel.com>
> Cc: stable@vger.kernel.org
> Fixes: ce0a1b608bfc ("x86/paravirt: Silence unused native_pv_lock_init() function warning")
Reviewed-by: Juergen Gross <jgross@suse.com>
Juergen
prev parent reply other threads:[~2024-07-16 9:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-15 17:18 Rik van Riel
2024-07-16 9:41 ` Jürgen Groß [this message]
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