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Mon, 12 Oct 2020 02:30:19 +0000 From: Damien Le Moal To: "ira.weiny@intel.com" , Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra CC: Naohiro Aota , "x86@kernel.org" , Dave Hansen , Dan Williams , Fenghua Yu , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-nvdimm@lists.01.org" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-kselftest@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "kvm@vger.kernel.org" , "netdev@vger.kernel.org" , "bpf@vger.kernel.org" , "kexec@lists.infradead.org" , "linux-bcache@vger.kernel.org" , "linux-mtd@lists.infradead.org" , "devel@driverdev.osuosl.org" , "linux-efi@vger.kernel.org" , "linux-mmc@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "target-devel@vger.kernel.org" , "linux-nfs@vger.kernel.org" , "ceph-devel@vger.kernel.org" , "linux-ext4@vger.kernel.org" , "linux-aio@kvack.org" , "io-uring@vger.kernel.org" , "linux-erofs@lists.ozlabs.org" , "linux-um@lists.infradead.org" , "linux-ntfs-dev@lists.sourceforge.net" , "reiserfs-devel@vger.kernel.org" , "linux-f2fs-devel@lists.sourceforge.net" , "linux-nilfs@vger.kernel.org" , "cluster-devel@redhat.com" , "ecryptfs@vger.kernel.org" , "linux-cifs@vger.kernel.org" , "linux-btrfs@vger.kernel.org" , "linux-afs@lists.infradead.org" , "linux-rdma@vger.kernel.org" , "amd-gfx@lists.freedesktop.org" , "dri-devel@lists.freedesktop.org" , "intel-gfx@lists.freedesktop.org" , "drbd-dev@lists.linbit.com" , "linux-block@vger.kernel.org" , "xen-devel@lists.xenproject.org" , "linux-cachefs@redhat.com" , "samba-technical@lists.samba.org" , "intel-wired-lan@lists.osuosl.org" Subject: Re: [PATCH RFC PKS/PMEM 26/58] fs/zonefs: Utilize new kmap_thread() Thread-Topic: [PATCH RFC PKS/PMEM 26/58] fs/zonefs: Utilize new kmap_thread() Thread-Index: AQHWnnW5LYLzak05pEGSI1gzotA84w== Date: Mon, 12 Oct 2020 02:30:18 +0000 Message-ID: References: <20201009195033.3208459-1-ira.weiny@intel.com> <20201009195033.3208459-27-ira.weiny@intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: intel.com; 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x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BL0PR04MB6514.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2d8e38c9-c661-47b4-955c-08d86e56c300 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Oct 2020 02:30:18.8981 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: FtNVgLbLUqLnCuOwFgwFyh+Wo2k/+4LOuBCyiRJEYABushz8+FxnNx4RRBUxLG0y9/lhxKLevLpPI63mq8apww== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR04MB6928 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2020/10/10 4:52, ira.weiny@intel.com wrote:=0A= > From: Ira Weiny =0A= > =0A= > The kmap() calls in this FS are localized to a single thread. To avoid= =0A= > the over head of global PKRS updates use the new kmap_thread() call.=0A= > =0A= > Cc: Damien Le Moal =0A= > Cc: Naohiro Aota =0A= > Signed-off-by: Ira Weiny =0A= > ---=0A= > fs/zonefs/super.c | 4 ++--=0A= > 1 file changed, 2 insertions(+), 2 deletions(-)=0A= > =0A= > diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c=0A= > index 8ec7c8f109d7..2fd6c86beee1 100644=0A= > --- a/fs/zonefs/super.c=0A= > +++ b/fs/zonefs/super.c=0A= > @@ -1297,7 +1297,7 @@ static int zonefs_read_super(struct super_block *sb= )=0A= > if (ret)=0A= > goto free_page;=0A= > =0A= > - super =3D kmap(page);=0A= > + super =3D kmap_thread(page);=0A= > =0A= > ret =3D -EINVAL;=0A= > if (le32_to_cpu(super->s_magic) !=3D ZONEFS_MAGIC)=0A= > @@ -1349,7 +1349,7 @@ static int zonefs_read_super(struct super_block *sb= )=0A= > ret =3D 0;=0A= > =0A= > unmap:=0A= > - kunmap(page);=0A= > + kunmap_thread(page);=0A= > free_page:=0A= > __free_page(page);=0A= > =0A= > =0A= =0A= acked-by: Damien Le Moal =0A= =0A= -- =0A= Damien Le Moal=0A= Western Digital Research=0A=