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bh=3EldsN3xTXJijYdTHFG7Y68THjF0o+jZi+JEiZxRG90=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=Ud6+Fvhod4odDRzr4NBTdqIh/K+6Y3uQQHTulssZiXo1NB0pZ8t7+ehJ/D3l9EdWq uA+QedpxGkEa9Sp+AMY+myeiioBjELsENnhoeXg35jHrtaWkI123GgCw6SyH3Ohp7T d01hhCALaz2MCAugGqMv55EUzOw4fuQ8KNuj6VBDzxg/b0FK8XcTrwmAKCI984Isgv tSf3fagWGzBUDVFJGyfpQdbpTlp1qHvGDlnpjO/gRh30pm7mvAUtJqnLytEIJabqvw 2E5QuiZbiYgKL8SGis+POuXqEClYPHsxqDT3+qOzrOdBXYwQjsKSseS52gjMetOmvo 0yubupr5z9+GA== Message-ID: <1179779e2f74e3e5cb2be30cf89e6362aaab706d.camel@kernel.org> Subject: Re: PROBLEM: NFS client IO fails with ERESTARTSYS when another mount point with the same export is unmounted with force [NFS] [SUNRPC] From: Jeff Layton To: Trond Myklebust , "chuck.lever@oracle.com" , "zhitao.li@smartx.com" , "tom@talpey.com" , "anna@kernel.org" , "Dai.Ngo@oracle.com" , "neilb@suse.de" , "kolga@netapp.com" Cc: "huangping@smartx.com" , "linux-nfs@vger.kernel.org" , "linux-kernel@vger.kernel.org" Date: Thu, 22 Feb 2024 06:05:02 -0500 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 kZWuOsJdJQdmwlWC5L5ln9xgfr/4mOY38B0U= Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.4 (3.50.4-1.fc39) Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2024-02-21 at 13:48 +0000, Trond Myklebust wrote: > On Wed, 2024-02-21 at 16:20 +0800, Zhitao Li wrote: > > [You don't often get email from zhitao.li@smartx.com. Learn why this > > is important at https://aka.ms/LearnAboutSenderIdentification=A0] > >=20 > > Hi, everyone, > >=20 > > - Facts: > > I have a remote NFS export and I mount the same export on two > > different directories in my OS with the same options. There is an > > inflight IO under one mounted directory. And then I unmount another > > mounted directory with force. The inflight IO ends up with "Unknown > > error 512", which is ERESTARTSYS. > >=20 >=20 > All of the above is well known. That's because forced umount affects > the entire filesystem. Why are you using it here in the first place? It > is not intended for casual use. >=20 While I agree Trond's above statement, the kernel is not supposed to leak error codes that high into userland. Are you seeing ERESTARTSYS being returned to system calls? If so, which ones? --=20 Jeff Layton