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From: Christoph Hellwig <hch@lst.de>
To: Jeff Layton <jlayton@kernel.org>
Cc: Dai Ngo <dai.ngo@oracle.com>,
	chuck.lever@oracle.com, neilb@ownmail.net, okorniev@redhat.com,
	tom@talpey.com, hch@lst.de, alex.aring@gmail.com,
	viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz,
	linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org
Subject: Re: [PATCH v4 2/3] locks: Threads with layout conflict must wait until client was fenced.
Date: Wed, 19 Nov 2025 10:53:30 +0100	[thread overview]
Message-ID: <20251119095330.GA25764@lst.de> (raw)
In-Reply-To: <5d19304ea493177c35d0ce13abe6dbf358240fa1.camel@kernel.org>

On Mon, Nov 17, 2025 at 01:21:32PM -0500, Jeff Layton wrote:
> > +	if (type == FL_LAYOUT && !ctx->flc_conflict) {
> > +		ctx->flc_conflict = true;
> > +		ctx->flc_wait_for_dispose = false;
> > +	}
> 
> I don't like special casing this for FL_LAYOUT leases. It seems like we
> ought to be able to set up a lm_breaker_timedout operation on any sort
> of lease.

Yes, this should check for a lm_breaker_timedout operation instead.

> > +
> > +	/* for FL_LAYOUT */
> > +	bool			flc_conflict;
> > +	bool			flc_wait_for_dispose;
> 
> I'm also not a fan of this particular bool. Waiting for any
> lm_breaker_timeout operations to complete seems like something we ought
> to just always do.

Yes.

> In the trivial case where we have no special fencing
> to do, that should just return quickly anyway.

Exactly.


  parent reply	other threads:[~2025-11-19  9:53 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-15 19:16 [Patch v4 0/3] NFSD: Fix server hang when there are multiple layout conflicts Dai Ngo
2025-11-15 19:16 ` [PATCH v4 1/3] locks: Introduce lm_breaker_timedout operation to lease_manager_operations Dai Ngo
2025-11-17 15:39   ` Chuck Lever
2025-11-17 19:17     ` Dai Ngo
2025-11-17 18:02   ` Jeff Layton
2025-11-17 19:41     ` Dai Ngo
2025-11-19 13:52       ` Jeff Layton
2025-11-19 16:32         ` Dai Ngo
2025-11-19  9:54   ` Christoph Hellwig
2025-11-19 14:04     ` Chuck Lever
2025-11-15 19:16 ` [PATCH v4 2/3] locks: Threads with layout conflict must wait until client was fenced Dai Ngo
2025-11-17 15:47   ` Chuck Lever
2025-11-17 19:21     ` Dai Ngo
2025-11-17 18:21   ` Jeff Layton
2025-11-17 19:49     ` Dai Ngo
2025-11-19  9:53     ` Christoph Hellwig [this message]
2025-11-15 19:16 ` [PATCH v4 3/3] FSD: Fix NFS server hang when there are multiple layout conflicts Dai Ngo
2025-11-15 19:44   ` Chuck Lever
2025-11-15 20:20     ` Dai Ngo
2025-11-19  9:56       ` Christoph Hellwig
2025-11-19 16:35         ` Dai Ngo
2025-11-17 15:55   ` Chuck Lever
2025-11-17 19:40     ` Dai Ngo
2025-11-17 21:13       ` Benjamin Coddington
2025-11-17 22:00         ` Dai Ngo
2025-11-19 10:08           ` Christoph Hellwig
2025-11-19 16:52             ` Dai Ngo
2025-11-20  6:50               ` Christoph Hellwig
2025-11-19 10:05       ` Christoph Hellwig
2025-11-19 14:04         ` Benjamin Coddington
2025-11-19 14:09         ` Chuck Lever
2025-11-19 14:12           ` Jeff Layton
2025-11-19 17:06           ` Dai Ngo
2025-11-20  6:52             ` Christoph Hellwig
2025-11-20  6:59           ` Christoph Hellwig
2025-11-19  9:57     ` Christoph Hellwig
2025-11-19 10:08   ` Christoph Hellwig

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