linux-kernel - Re: [PATCH v2] x86/xen/time: Reduce Xen timer tick

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Date: Mon, 1 Jul 2024 10:25:37 +0200
From: Jürgen Groß <jgross@...e.com>
To: Frediano Ziglio <frediano.ziglio@...ud.com>,
 xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Cc: "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
 Dave Hansen <dave.hansen@...ux.intel.com>, Borislav Petkov <bp@...en8.de>,
 Ingo Molnar <mingo@...hat.com>, Thomas Gleixner <tglx@...utronix.de>,
 Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [PATCH v2] x86/xen/time: Reduce Xen timer tick

On 19.06.24 12:40, Frediano Ziglio wrote:
> Current timer tick is causing some deadline to fail.
> The current high value constant was probably due to an old
> bug in the Xen timer implementation causing errors if the
> deadline was in the future.
> 
> This was fixed in Xen commit:
> 19c6cbd90965 xen/vcpu: ignore VCPU_SSHOTTMR_future
> 
> Usage of VCPU_SSHOTTMR_future in Linux kernel was removed by:
> c06b6d70feb3 xen/x86: don't lose event interrupts
> 
> Signed-off-by: Frediano Ziglio <frediano.ziglio@...ud.com>

Reviewed-by: Juergen Gross <jgross@...e.com>

Juergen