| [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
 [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@xxxxxxxxxDate: Fri,  9 Oct 2020 12:49:58 -0700Cc: 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@xxxxxxxxxxxxxxxxDelivery-date: Fri, 09 Oct 2020 19:52:13 +0000Ironport-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
 |