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[PATCH RFC PKS/PMEM 24/58] fs/freevxfs: Utilize new kmap_thread()
- To: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>
- From: ira.weiny@xxxxxxxxx
- Date: Fri, 9 Oct 2020 12:49:59 -0700
- Cc: Ira Weiny <ira.weiny@xxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, x86@xxxxxxxxxx, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-nvdimm@xxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kselftest@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, kexec@xxxxxxxxxxxxxxxxxxx, linux-bcache@xxxxxxxxxxxxxxx, linux-mtd@xxxxxxxxxxxxxxxxxxx, devel@xxxxxxxxxxxxxxxxxxxx, linux-efi@xxxxxxxxxxxxxxx, linux-mmc@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, target-devel@xxxxxxxxxxxxxxx, linux-nfs@xxxxxxxxxxxxxxx, ceph-devel@xxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-aio@xxxxxxxxx, io-uring@xxxxxxxxxxxxxxx, linux-erofs@xxxxxxxxxxxxxxxx, linux-um@xxxxxxxxxxxxxxxxxxx, linux-ntfs-dev@xxxxxxxxxxxxxxxxxxxxx, reiserfs-devel@xxxxxxxxxxxxxxx, linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx, linux-nilfs@xxxxxxxxxxxxxxx, cluster-devel@xxxxxxxxxx, ecryptfs@xxxxxxxxxxxxxxx, linux-cifs@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, linux-afs@xxxxxxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, amd-gfx@xxxxxxxxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, intel-gfx@xxxxxxxxxxxxxxxxxxxxx, drbd-dev@xxxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-cachefs@xxxxxxxxxx, samba-technical@xxxxxxxxxxxxxxx, intel-wired-lan@xxxxxxxxxxxxxxxx
- Delivery-date: Fri, 09 Oct 2020 19:52:23 +0000
- Ironport-sdr: v5b9Q8Z2GSzBmZpclLi79CDcBclwnaLDng+afkWHJyp8MtfG51HJ/dnMv79JJlXETxnoSQaMLm BTw3tczoCwBA==
- Ironport-sdr: 3JX06O44Su5jMQA8yIL2WSzzn7vN3G6TESZobv60VERxc/1W/c4pPVNWJf815mQW07ftkYqATa 1m7LiUgK4+Rg==
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
From: Ira Weiny <ira.weiny@xxxxxxxxx>
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: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
fs/freevxfs/vxfs_immed.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/freevxfs/vxfs_immed.c b/fs/freevxfs/vxfs_immed.c
index bfc780c682fb..9c42fec4cd85 100644
--- a/fs/freevxfs/vxfs_immed.c
+++ b/fs/freevxfs/vxfs_immed.c
@@ -69,9 +69,9 @@ vxfs_immed_readpage(struct file *fp, struct page *pp)
u_int64_t offset = (u_int64_t)pp->index << PAGE_SHIFT;
caddr_t kaddr;
- kaddr = kmap(pp);
+ kaddr = kmap_thread(pp);
memcpy(kaddr, vip->vii_immed.vi_immed + offset, PAGE_SIZE);
- kunmap(pp);
+ kunmap_thread(pp);
flush_dcache_page(pp);
SetPageUptodate(pp);
--
2.28.0.rc0.12.gb6a658bd00c9
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