Re: Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released

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To: Jinjiang Tu <tujinjiang@xxxxxxxxxx>
Subject: Re: Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released
From: Peter Xu <peterx@xxxxxxxxxx>
Date: Wed, 12 Mar 2025 10:09:29 -0400
Cc: jimsiak <jimsiak@xxxxxxxxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, viro@xxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, wangkefeng.wang@xxxxxxxxxx
In-reply-to: <20a6b1c1-389e-b57a-7a5c-d1b0a7185412@huawei.com>

On Wed, Mar 12, 2025 at 05:18:26PM +0800, Jinjiang Tu wrote:
> Since this patch works, could you please send a formal patch to maillist?

Will do it later today, thanks.

-- 
Peter Xu

References:
- Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released
  - From: Dimitris Siakavaras
- Re: Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released
  - From: jimsiak
- Re: Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released
  - From: Peter Xu
- Re: Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released
  - From: Jinjiang Tu
- Re: Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released
  - From: Peter Xu
- Re: Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released
  - From: Jinjiang Tu
- Re: Using userfaultfd with KVM's async page fault handling causes processes to hung waiting for mmap_lock to be released
  - From: Jinjiang Tu

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