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Subject: Re: [PATCH] nfsd: fix race between cache_clean and cache_purge
From:   Chuck Lever <chuck.lever@oracle.com>
In-Reply-To: <20200325010158.81CD12074D@mail.kernel.org>
Date:   Wed, 25 Mar 2020 10:13:08 -0400
Cc:     Yihao Wu <wuyihao@linux.alibaba.com>,
        Bruce Fields <bfields@fieldses.org>,
        Linux NFS Mailing List <linux-nfs@vger.kernel.org>,
        stable@vger.kernel.org
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References: <5eed50660eb13326b0fbf537fb58481ea53c1acb.1585043174.git.wuyihao@linux.alibaba.com>
 <20200325010158.81CD12074D@mail.kernel.org>
To:     Sasha Levin <sashal@kernel.org>
Sender: linux-nfs-owner@vger.kernel.org
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> On Mar 24, 2020, at 9:01 PM, Sasha Levin <sashal@kernel.org> wrote:
>=20
> Hi
>=20
> [This is an automated email]
>=20
> The bot has tested the following trees: v5.5.11, v5.4.27, v4.19.112, =
v4.14.174, v4.9.217, v4.4.217.
>=20
> v5.5.11: Build OK!
> v5.4.27: Build OK!
> v4.19.112: Failed to apply! Possible dependencies:
>    1863d77f15da ("SUNRPC: Replace the cache_detail->hash_lock with a =
regular spinlock")
>=20
> v4.14.174: Failed to apply! Possible dependencies:
>    1863d77f15da ("SUNRPC: Replace the cache_detail->hash_lock with a =
regular spinlock")
>=20
> v4.9.217: Failed to apply! Possible dependencies:
>    1863d77f15da ("SUNRPC: Replace the cache_detail->hash_lock with a =
regular spinlock")
>    2b477c00f3bd ("svcrpc: free contexts immediately on PROC_DESTROY")
>    471a930ad7d1 ("SUNRPC: Drop all entries from cache_detail when =
cache_purge()")
>=20
> v4.4.217: Failed to apply! Possible dependencies:
>    1863d77f15da ("SUNRPC: Replace the cache_detail->hash_lock with a =
regular spinlock")
>    2b477c00f3bd ("svcrpc: free contexts immediately on PROC_DESTROY")
>    471a930ad7d1 ("SUNRPC: Drop all entries from cache_detail when =
cache_purge()")
>    d8d29138b17c ("sunrpc: remove 'inuse' flag from struct =
cache_detail.")
>=20
>=20
> NOTE: The patch will not be queued to stable trees until it is =
upstream.
>=20
> How should we proceed with this patch?

Please drop it. Thanks!


--
Chuck Lever