Re: [RFC PATCH 11/13] x86/uintr: Introduce uintr_wait() syscall

To: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, <x86@xxxxxxxxxx>
Subject: Re: [RFC PATCH 11/13] x86/uintr: Introduce uintr_wait() syscall
From: Sohil Mehta <sohil.mehta@xxxxxxxxx>
Date: Tue, 28 Sep 2021 16:13:27 -0700
Cc: Tony Luck <tony.luck@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Christian Brauner <christian@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Shuah Khan <shuah@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Ashok Raj <ashok.raj@xxxxxxxxx>, Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>, "Gayatri Kammela" <gayatri.kammela@xxxxxxxxx>, Zeng Guang <guang.zeng@xxxxxxxxx>, "Dan Williams" <dan.j.williams@xxxxxxxxx>, Randy E Witt <randy.e.witt@xxxxxxxxx>, Ravi V Shankar <ravi.v.shankar@xxxxxxxxx>, Ramesh Thomas <ramesh.thomas@xxxxxxxxx>, <linux-api@xxxxxxxxxxxxxxx>, <linux-arch@xxxxxxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <linux-kselftest@xxxxxxxxxxxxxxx>
In-reply-to: <87czoweu2d.ffs@tglx>
References: <20210913200132.3396598-1-sohil.mehta@intel.com> <20210913200132.3396598-12-sohil.mehta@intel.com> <87r1dedykm.ffs@tglx> <87czoweu2d.ffs@tglx>
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On 9/25/2021 5:08 AM, Thomas Gleixner wrote:

Aisde of that this is completely broken vs. CPU hotplug.

Thank you for pointing this out. I hadn't even considered CPU hotplug.

Thanks,
Sohil

References:
- [RFC PATCH 00/13] x86 User Interrupts support
  - From: Sohil Mehta
- [RFC PATCH 11/13] x86/uintr: Introduce uintr_wait() syscall
  - From: Sohil Mehta
- Re: [RFC PATCH 11/13] x86/uintr: Introduce uintr_wait() syscall
  - From: Thomas Gleixner
- Re: [RFC PATCH 11/13] x86/uintr: Introduce uintr_wait() syscall
  - From: Thomas Gleixner