Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
IronPort-SDR: zq5dvuFd6jXpbgXHXDd3kanr7kGVYAspkSVx4KqGtzBddQtGcPnRKRjJwx5QrQv4TFmaka5zeS
 Gu84SEdAGvPQ==
IronPort-SDR: +9tLMQNrOc9ZmtQe+NKSSXZyhjRooFfxfongQijBj4blQjg4c6+fJ/ZHkl3bUeAx7HZ0qDTuwd
 uW08H1SVCXkg==
From:   ira.weiny@intel.com
To:     Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>
Cc:     Ira Weiny <ira.weiny@intel.com>, x86@kernel.org,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Fenghua Yu <fenghua.yu@intel.com>, 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 38/58] fs/isofs: Utilize new kmap_thread()
Date:   Fri,  9 Oct 2020 12:50:13 -0700
Message-Id: <20201009195033.3208459-39-ira.weiny@intel.com>
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: 8bit
Precedence: bulk

From: Ira Weiny <ira.weiny@intel.com>

These kmap() calls are localized to a single thread.  To avoid the over head of
global PKRS updates use the new kmap_thread() call.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 fs/isofs/compress.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
index bc12ac7e2312..ddd3fd99d2e1 100644
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -344,7 +344,7 @@ static int zisofs_readpage(struct file *file, struct page *page)
 			pages[i] = grab_cache_page_nowait(mapping, index);
 		if (pages[i]) {
 			ClearPageError(pages[i]);
-			kmap(pages[i]);
+			kmap_thread(pages[i]);
 		}
 	}
 
@@ -356,7 +356,7 @@ static int zisofs_readpage(struct file *file, struct page *page)
 			flush_dcache_page(pages[i]);
 			if (i == full_page && err)
 				SetPageError(pages[i]);
-			kunmap(pages[i]);
+			kunmap_thread(pages[i]);
 			unlock_page(pages[i]);
 			if (i != full_page)
 				put_page(pages[i]);
-- 
2.28.0.rc0.12.gb6a658bd00c9