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a="162068029" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162068029" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False IronPort-SDR: A7QVfEYpWd+zukvvJSzSDlmpc6UtcI1VTl49mnWle7o9+shZWHPb4ayBrZUheEhKcyM4kHv/QX ai2WmfcpOoFA== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="389237190" From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Jeff Dike , Richard Weinberger , Anton Ivanov , 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: [PATCH RFC PKS/PMEM 32/58] fs/hostfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:07 -0700 Message-Id: <20201009195033.3208459-33-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Jeff Dike Cc: Richard Weinberger Cc: Anton Ivanov Signed-off-by: Ira Weiny --- fs/hostfs/hostfs_kern.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index c070c0d8e3e9..608efd0f83cb 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -409,7 +409,7 @@ static int hostfs_writepage(struct page *page, struct w= riteback_control *wbc) if (page->index >=3D end_index) count =3D inode->i_size & (PAGE_SIZE-1); =20 - buffer =3D kmap(page); + buffer =3D kmap_thread(page); =20 err =3D write_file(HOSTFS_I(inode)->fd, &base, buffer, count); if (err !=3D count) { @@ -425,7 +425,7 @@ static int hostfs_writepage(struct page *page, struct w= riteback_control *wbc) err =3D 0; =20 out: - kunmap(page); + kunmap_thread(page); =20 unlock_page(page); return err; @@ -437,7 +437,7 @@ static int hostfs_readpage(struct file *file, struct pa= ge *page) loff_t start =3D page_offset(page); int bytes_read, ret =3D 0; =20 - buffer =3D kmap(page); + buffer =3D kmap_thread(page); bytes_read =3D read_file(FILE_HOSTFS_I(file)->fd, &start, buffer, PAGE_SIZE); if (bytes_read < 0) { @@ -454,7 +454,7 @@ static int hostfs_readpage(struct file *file, struct pa= ge *page) =20 out: flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); unlock_page(page); return ret; } @@ -480,9 +480,9 @@ static int hostfs_write_end(struct file *file, struct a= ddress_space *mapping, unsigned from =3D pos & (PAGE_SIZE - 1); int err; =20 - buffer =3D kmap(page); + buffer =3D kmap_thread(page); err =3D write_file(FILE_HOSTFS_I(file)->fd, &pos, buffer + from, copied); - kunmap(page); + kunmap_thread(page); =20 if (!PageUptodate(page) && err =3D=3D PAGE_SIZE) SetPageUptodate(page); --=20 2.28.0.rc0.12.gb6a658bd00c9