From: Sean Christopherson <seanjc@google.com>
To: Hao Peng <flyingpenghao@gmail.com>
Cc: pbonzini@redhat.com, kvm@vger.kernel.org, inux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] KVM: x86: Keep the lock order consistent
Date: Fri, 2 Dec 2022 19:23:12 +0000 [thread overview]
Message-ID: <Y4pQoHRWfxGsdOQd@google.com> (raw)
In-Reply-To: <CAPm50a++Cb=QfnjMZ2EnCj-Sb9Y4UM-=uOEtHAcjnNLCAAf-dQ@mail.gmail.com>
On Tue, Nov 08, 2022, Hao Peng wrote:
> From: Peng Hao <flyingpeng@tencent.com>
>
> Acquire SRCU before taking the gpc spinlock in wait_pending_event() so as
> to be consistent with all other functions that acquire both locks. It's
> not illegal to acquire SRCU inside a spinlock, nor is there deadlock
> potential, but in general it's preferable to order locks from least
> restrictive to most restrictive, e.g. if wait_pending_event() needed to
> sleep for whatever reason, it could do so while holding SRCU, but would
> need to drop the spinlock.
>
> Thanks Sean Christopherson for the comment.
>
> Signed-off-by: Peng Hao <flyingpeng@tencent.com>
> Reviewed-by: Sean Christopherson <seanjc@google.com>
> ---
Merged to kvm/queue, thanks!
https://lore.kernel.org/all/Y4lHxds8pvBhxXFX@google.com
prev parent reply other threads:[~2022-12-02 19:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-08 3:50 [PATCH v3] KVM: x86: Keep the lock order consistent Hao Peng
2022-12-02 19:23 ` Sean Christopherson [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Y4pQoHRWfxGsdOQd@google.com \
--to=seanjc@google.com \
--cc=flyingpenghao@gmail.com \
--cc=inux-kernel@vger.kernel.org \
--cc=kvm@vger.kernel.org \
--cc=pbonzini@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.