linux-kernel - Re: [PATCH v2 2/2] xfs: Fix false positive lockdep warning with sb_internal & fs

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Date:   Fri, 19 Jun 2020 11:08:17 -0400
From:   Waiman Long <longman@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     "Darrick J. Wong" <darrick.wong@...cle.com>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dave Chinner <david@...morbit.com>, Qian Cai <cai@....pw>,
        Eric Sandeen <sandeen@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 2/2] xfs: Fix false positive lockdep warning with
 sb_internal & fs_reclaim

On 6/19/20 9:21 AM, Christoph Hellwig wrote:
> I find it really confusing that we record this in current->flags.
> per-thread state makes total sense for not dipping into fs reclaim.
> But for annotating something related to memory allocation passing flags
> seems a lot more descriptive to me, as it is about particular locks.
>
I am dropping this patchset as just using PF_MEMALLOC_NOFS is good enough.

Cheers,
Longman