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Open Source and information security mailing list archives
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Date: Mon, 12 Oct 2020 02:30:18 +0000 From: Damien Le Moal <Damien.LeMoal@....com> To: "ira.weiny@...el.com" <ira.weiny@...el.com>, Andrew Morton <akpm@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Andy Lutomirski <luto@...nel.org>, Peter Zijlstra <peterz@...radead.org> CC: Naohiro Aota <Naohiro.Aota@....com>, "x86@...nel.org" <x86@...nel.org>, Dave Hansen <dave.hansen@...ux.intel.com>, Dan Williams <dan.j.williams@...el.com>, Fenghua Yu <fenghua.yu@...el.com>, "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>, "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>, "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "bpf@...r.kernel.org" <bpf@...r.kernel.org>, "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>, "linux-bcache@...r.kernel.org" <linux-bcache@...r.kernel.org>, "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>, "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>, "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>, "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>, "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>, "target-devel@...r.kernel.org" <target-devel@...r.kernel.org>, "linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>, "ceph-devel@...r.kernel.org" <ceph-devel@...r.kernel.org>, "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>, "linux-aio@...ck.org" <linux-aio@...ck.org>, "io-uring@...r.kernel.org" <io-uring@...r.kernel.org>, "linux-erofs@...ts.ozlabs.org" <linux-erofs@...ts.ozlabs.org>, "linux-um@...ts.infradead.org" <linux-um@...ts.infradead.org>, "linux-ntfs-dev@...ts.sourceforge.net" <linux-ntfs-dev@...ts.sourceforge.net>, "reiserfs-devel@...r.kernel.org" <reiserfs-devel@...r.kernel.org>, "linux-f2fs-devel@...ts.sourceforge.net" <linux-f2fs-devel@...ts.sourceforge.net>, "linux-nilfs@...r.kernel.org" <linux-nilfs@...r.kernel.org>, "cluster-devel@...hat.com" <cluster-devel@...hat.com>, "ecryptfs@...r.kernel.org" <ecryptfs@...r.kernel.org>, "linux-cifs@...r.kernel.org" <linux-cifs@...r.kernel.org>, "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>, "linux-afs@...ts.infradead.org" <linux-afs@...ts.infradead.org>, "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>, "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>, "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>, "drbd-dev@...ts.linbit.com" <drbd-dev@...ts.linbit.com>, "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>, "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>, "linux-cachefs@...hat.com" <linux-cachefs@...hat.com>, "samba-technical@...ts.samba.org" <samba-technical@...ts.samba.org>, "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org> Subject: Re: [PATCH RFC PKS/PMEM 26/58] fs/zonefs: Utilize new kmap_thread() On 2020/10/10 4:52, ira.weiny@...el.com wrote: > From: Ira Weiny <ira.weiny@...el.com> > > 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: Damien Le Moal <damien.lemoal@....com> > Cc: Naohiro Aota <naohiro.aota@....com> > Signed-off-by: Ira Weiny <ira.weiny@...el.com> > --- > fs/zonefs/super.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c > index 8ec7c8f109d7..2fd6c86beee1 100644 > --- a/fs/zonefs/super.c > +++ b/fs/zonefs/super.c > @@ -1297,7 +1297,7 @@ static int zonefs_read_super(struct super_block *sb) > if (ret) > goto free_page; > > - super = kmap(page); > + super = kmap_thread(page); > > ret = -EINVAL; > if (le32_to_cpu(super->s_magic) != ZONEFS_MAGIC) > @@ -1349,7 +1349,7 @@ static int zonefs_read_super(struct super_block *sb) > ret = 0; > > unmap: > - kunmap(page); > + kunmap_thread(page); > free_page: > __free_page(page); > > acked-by: Damien Le Moal <damien.lemoal@....com> -- Damien Le Moal Western Digital Research
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