Re: [PATCH 3/5] xfs: Use rwsem_is_write_locked()

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To: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: Re: [PATCH 3/5] xfs: Use rwsem_is_write_locked()
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Fri, 8 Sep 2023 02:09:51 -0700
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Waiman Long <longman@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Chandan Babu R <chandan.babu@xxxxxxxxxx>, "Darrick J . Wong" <djwong@xxxxxxxxxx>, linux-xfs@xxxxxxxxxxxxxxx
In-reply-to: <20230907174705.2976191-4-willy@infradead.org>
References: <20230907174705.2976191-1-willy@infradead.org> <20230907174705.2976191-4-willy@infradead.org>

On Thu, Sep 07, 2023 at 06:47:03PM +0100, Matthew Wilcox (Oracle) wrote:
> This avoids using the mr_writer field to check the XFS ILOCK is held
> for write.  It also improves the checking we do when lockdep is disabled.

Hmm, is there any reason to keep the lockdep-based version of
__xfs_rwsem_islocked around now at all?

Follow-Ups:
- Re: [PATCH 3/5] xfs: Use rwsem_is_write_locked()
  - From: Christoph Hellwig

References:
- [PATCH 0/5] Remove the XFS mrlock
  - From: Matthew Wilcox (Oracle)
- [PATCH 3/5] xfs: Use rwsem_is_write_locked()
  - From: Matthew Wilcox (Oracle)

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