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Date: Wed, 12 Jun 2024 16:46:54 +0200
From: Greg KH <greg@kroah.com>
To: cel@kernel.org
Cc: stable@vger.kernel.org, linux-nfs@vger.kernel.org,
	NeilBrown <neilb@suse.de>, Jon Hunter <jonathanh@nvidia.com>
Subject: Re: [PATCH 5.15] sunrpc: exclude from freezer when waiting for
 requests:
Message-ID: <2024061245-climate-sedation-d03f@gregkh>
References: <20240607131048.8795-1-cel@kernel.org>
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In-Reply-To: <20240607131048.8795-1-cel@kernel.org>

On Fri, Jun 07, 2024 at 09:10:48AM -0400, cel@kernel.org wrote:
> From: NeilBrown <neilb@suse.de>
> 
> Prior to v6.1, the freezer will only wake a kernel thread from an
> uninterruptible sleep.  Since we changed svc_get_next_xprt() to use and
> IDLE sleep the freezer cannot wake it.  We need to tell the freezer to
> ignore it instead.
> 
> To make this work with only upstream commits, 5.15.y would need
> commit f5d39b020809 ("freezer,sched: Rewrite core freezer logic")
> which allows non-interruptible sleeps to be woken by the freezer.
> 
> Fixes: 9b8a8e5e8129 ("nfsd: don't allow nfsd threads to be signalled.")
> Tested-by: Jon Hunter <jonathanh@nvidia.com>
> Signed-off-by: NeilBrown <neilb@suse.de>
> ---
>  fs/nfs/callback.c     | 2 +-
>  fs/nfsd/nfs4proc.c    | 3 ++-
>  net/sunrpc/svc_xprt.c | 4 ++--
>  3 files changed, 5 insertions(+), 4 deletions(-)

Sorry for the delay, now queued up.

greg k-h