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Re: [Xen-devel] [PATCH v4 6/6] xen/rcu: add per-lock counter in debug builds

To: Juergen Gross <jgross@xxxxxxxx>
From: Jan Beulich <jbeulich@xxxxxxxx>
Date: Wed, 11 Mar 2020 13:14:44 +0100
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Wei Liu <wl@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
Delivery-date: Wed, 11 Mar 2020 12:15:06 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 10.03.2020 08:28, Juergen Gross wrote:
> Add a lock specific counter to rcu read locks in debug builds. This
> allows to test for matching lock/unlock calls.

Similar checking doesn't exist for e.g. spin locks iirc, and hence
I think you want to spend the word on the "why" here.

Jan

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Follow-Ups:
- Re: [Xen-devel] [PATCH v4 6/6] xen/rcu: add per-lock counter in debug builds
  - From: Jürgen Groß

References:
- [Xen-devel] [PATCH v4 0/6] xen/rcu: let rcu work better with core scheduling
  - From: Juergen Gross
- [Xen-devel] [PATCH v4 6/6] xen/rcu: add per-lock counter in debug builds
  - From: Juergen Gross

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