From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Michael Kelley <mhklinux@outlook.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
Long Li <longli@microsoft.com>, Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Florian Bezdeka <florian.bezdeka@siemens.com>,
RT <linux-rt-users@vger.kernel.org>,
Mitchell Levy <levymitchell0@gmail.com>,
Saurabh Singh Sengar <ssengar@linux.microsoft.com>,
Naman Jain <namjain@linux.microsoft.com>
Subject: Re: [PATCH v3] drivers: hv: vmbus: Use kthread for vmbus interrupts on PREEMPT_RT
Date: Wed, 18 Mar 2026 12:21:13 +0100 [thread overview]
Message-ID: <20260318112113.JDm06Hr-@linutronix.de> (raw)
In-Reply-To: <7f248f1f-a4ad-442d-bd85-23e57e58eeba@siemens.com>
On 2026-03-18 12:03:03 [+0100], Jan Kiszka wrote:
> > Either way, that add_interrupt_randomness() should be moved to
> > sysvec_hyperv_callback() like it has been done for
> > sysvec_hyperv_stimer0(). It should be invoked twice now if gets there
> > via vmbus_percpu_isr().
>
> No, this would degrade arm64.
Okay. So why does this needs to be done for _this_ per-CPU IRQ on ARM64
but not for the others? What does it make so special.
> Jan
Sebastian
next prev parent reply other threads:[~2026-03-18 11:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-16 16:24 [PATCH v3] drivers: hv: vmbus: Use kthread for vmbus interrupts on PREEMPT_RT Jan Kiszka
2026-02-17 6:42 ` Michael Kelley
2026-02-17 23:03 ` Bezdeka, Florian
2026-02-18 6:48 ` Jan Kiszka
2026-02-18 7:05 ` Wei Liu
2026-02-18 7:19 ` Saurabh Singh Sengar
2026-03-12 17:07 ` Sebastian Andrzej Siewior
2026-03-17 7:49 ` Jan Kiszka
2026-03-17 11:01 ` Sebastian Andrzej Siewior
2026-03-17 11:55 ` Jan Kiszka
2026-03-18 9:08 ` Sebastian Andrzej Siewior
2026-03-18 11:02 ` Jan Kiszka
2026-03-17 17:25 ` Michael Kelley
2026-03-18 5:52 ` Jan Kiszka
2026-03-18 10:01 ` Sebastian Andrzej Siewior
2026-03-18 11:03 ` Jan Kiszka
2026-03-18 11:21 ` Sebastian Andrzej Siewior [this message]
2026-03-18 12:12 ` Jan Kiszka
2026-03-19 3:43 ` Michael Kelley
2026-03-19 10:14 ` Sebastian Andrzej Siewior
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