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[PATCH RFC PKS/PMEM 23/58] fs/fuse: 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 12:49:58 -0700
- Cc: Ira Weiny <ira.weiny@xxxxxxxxx>, Miklos Szeredi <miklos@xxxxxxxxxx>, 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 19:52:13 +0000
- Ironport-sdr: AVSKZFwlV1ldgQIvgIgp+VNk1rb9F997DQAB5T/JQHKkrwSWqMMgm3DTpbU3qi5SJJPXOhr8iA DoV7+m7jZIoQ==
- Ironport-sdr: zRSzmM1HZFGhzQcGhWxIWUdt7PON477D2ysFpCnQTUxdw9Z8VdaNQXVN+6ixBePqleDwfFxfgw K58aOn7YePQQ==
- 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: Miklos Szeredi <miklos@xxxxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
fs/fuse/readdir.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/fuse/readdir.c b/fs/fuse/readdir.c
index 90e3f01bd796..953ffe6f56e3 100644
--- a/fs/fuse/readdir.c
+++ b/fs/fuse/readdir.c
@@ -536,9 +536,9 @@ static int fuse_readdir_cached(struct file *file, struct
dir_context *ctx)
* Contents of the page are now protected against changing by holding
* the page lock.
*/
- addr = kmap(page);
+ addr = kmap_thread(page);
res = fuse_parse_cache(ff, addr, size, ctx);
- kunmap(page);
+ kunmap_thread(page);
unlock_page(page);
put_page(page);
--
2.28.0.rc0.12.gb6a658bd00c9
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