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Re: [PATCH v2] x86: Use 32-bit counter for TLB clock on debug builds
- To: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 13 Jan 2026 12:43:25 +0000
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Tue, 13 Jan 2026 12:43:40 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13/01/2026 12:09 pm, Alejandro Vallejo wrote:
> Debug builds traditionally ship with a 10-bit counter for the TLB
> clock. This forces global TLB shootdowns with high frequency, making
> debug builds unsuitable for any form of real time testing.
>
> Remove this quirk, unifying release and debug under a wide counter.
>
> Signed-off-by: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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