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Wong" Cc: "Rafael J. Wysocki" , Linux PM , Linux Memory Management List , linux-fsdevel@vger.kernel.org, mkleinsoft@gmail.com, Christoph Hellwig , Andrew Morton , "Rafael J. Wysocki" , Len Brown , Pavel Machek Subject: Re: [PATCH] hibernate: unlock swap bdev for writing when uswsusp is active Message-ID: <20200421183928.GA23758@dumbo> References: <20200229170825.GX8045@magnolia> <20200229180716.GA31323@dumbo> <20200229183820.GA8037@magnolia> <20200229200200.GA10970@dumbo> <20200420185255.GA20916@dumbo> <20200421154333.GG6749@magnolia> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="EVF5PPMfhYS0aIcm" Content-Disposition: inline In-Reply-To: <20200421154333.GG6749@magnolia> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --EVF5PPMfhYS0aIcm Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Apr 21, 2020 at 08:43:33AM -0700, Darrick J. Wong wrote: > On Mon, Apr 20, 2020 at 08:52:55PM +0200, Domenico Andreoli wrote: > > On Sun, Mar 01, 2020 at 10:35:36PM +0100, Rafael J. Wysocki wrote: > > > On Sat, Feb 29, 2020 at 9:02 PM Domenico Andreoli wrote: > > > > > > > > Maybe user-space hibernation should be a separate option. > > >=20 > > > That actually is not a bad idea at all in my view. > >=20 > > I prepared a patch for this: > > https://lore.kernel.org/linux-pm/20200413190843.044112674@gmail.com/ >=20 > If you succeed in making uswsusp a kconfig option, can you amend the > "!hibernation available()" test in blkdev_write_iter so that users of > in-kernel hibernate are protected against userspace swap device > scribbles, please? Yes, that's the plan. >=20 > --D Domenico --=20 rsa4096: 3B10 0CA1 8674 ACBA B4FE FCD2 CE5B CF17 9960 DE13 ed25519: FFB4 0CC3 7F2E 091D F7DA 356E CC79 2832 ED38 CB05 --EVF5PPMfhYS0aIcm Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEQ0d58WdvR3VfrFIt+pSrUd21xpcFAl6fPdsACgkQ+pSrUd21 xpdgzxAAzENdcM+tVdeJp7QwPwm0wea0IR10oKlhNdCrfL0n/EL2xJyXaWsKZQN6 tQN8O5rsM/FMagaY/askhRd0yv/nVcSxeWHlnlvDlVB8vK6jd4sJYekuReL1xA3c 4CD2y38JkX5m1BNkljm1Twg+kfgZSRv8g7rWQ31rOotF+joJvBkPUdd0cyiGWxrd zy9/r5MpAPk5O4ya6TjzVarGZvSmqzqJ92MMHCvCumGOC1lEHqOU1GzsTZvrYcYI R8OLNfeDcHKeSjg6NGjRBKHNeuYy3PanlNNabYBDY1eICCicSOTh9gw2iiKSyN7j MKboOazCUwH77IK+qimrx1WL1zhH1AeGvn4yxIZPIQGs48oYL4cJw4RaCDfNj2gY ynHGRZD5OcPWmHwsfmTV52uRWHRis7ziOE4ay09Pw/JYl0+q+54d2z//O6wy+EJg uImjyBxpza4ySqrZ1QLJoOlw/vaD9rQXlk7IBav39xHpXBoUs86t3KnrNyXWMthV AcN04jHhsjjebYzu9HvJO2DwxtobKhenkivHJcRGZH8c1p8VvsSeLWQqSTpz2bqx n47SGboLz518iSwGelnXe9RYxqaHyld4+eMwXXrOWhl6DA7ruGvMqIvZYqKJgb2P KnSbCPc6K8r/ImOgHvIOkcJ3hDyvaRIs3IArV8RpO/X78MZX7JI= =9bYt -----END PGP SIGNATURE----- --EVF5PPMfhYS0aIcm--