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Date: Fri, 9 Oct 2020 12:50:07 -0700 From: ira.weiny@...el.com To: 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: Ira Weiny <ira.weiny@...el.com>, Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>, Anton Ivanov <anton.ivanov@...bridgegreys.com>, 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-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, linux-kselftest@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, kvm@...r.kernel.org, netdev@...r.kernel.org, bpf@...r.kernel.org, kexec@...ts.infradead.org, linux-bcache@...r.kernel.org, linux-mtd@...ts.infradead.org, devel@...verdev.osuosl.org, linux-efi@...r.kernel.org, linux-mmc@...r.kernel.org, linux-scsi@...r.kernel.org, target-devel@...r.kernel.org, linux-nfs@...r.kernel.org, ceph-devel@...r.kernel.org, linux-ext4@...r.kernel.org, linux-aio@...ck.org, io-uring@...r.kernel.org, linux-erofs@...ts.ozlabs.org, linux-um@...ts.infradead.org, linux-ntfs-dev@...ts.sourceforge.net, reiserfs-devel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, linux-nilfs@...r.kernel.org, cluster-devel@...hat.com, ecryptfs@...r.kernel.org, linux-cifs@...r.kernel.org, linux-btrfs@...r.kernel.org, linux-afs@...ts.infradead.org, linux-rdma@...r.kernel.org, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org, drbd-dev@...ts.linbit.com, linux-block@...r.kernel.org, xen-devel@...ts.xenproject.org, linux-cachefs@...hat.com, samba-technical@...ts.samba.org, intel-wired-lan@...ts.osuosl.org Subject: [PATCH RFC PKS/PMEM 32/58] fs/hostfs: Utilize new kmap_thread() 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: Jeff Dike <jdike@...toit.com> Cc: Richard Weinberger <richard@....at> Cc: Anton Ivanov <anton.ivanov@...bridgegreys.com> Signed-off-by: Ira Weiny <ira.weiny@...el.com> --- fs/hostfs/hostfs_kern.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index c070c0d8e3e9..608efd0f83cb 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -409,7 +409,7 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc) if (page->index >= end_index) count = inode->i_size & (PAGE_SIZE-1); - buffer = kmap(page); + buffer = kmap_thread(page); err = write_file(HOSTFS_I(inode)->fd, &base, buffer, count); if (err != count) { @@ -425,7 +425,7 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc) err = 0; out: - kunmap(page); + kunmap_thread(page); unlock_page(page); return err; @@ -437,7 +437,7 @@ static int hostfs_readpage(struct file *file, struct page *page) loff_t start = page_offset(page); int bytes_read, ret = 0; - buffer = kmap(page); + buffer = kmap_thread(page); bytes_read = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer, PAGE_SIZE); if (bytes_read < 0) { @@ -454,7 +454,7 @@ static int hostfs_readpage(struct file *file, struct page *page) out: flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); unlock_page(page); return ret; } @@ -480,9 +480,9 @@ static int hostfs_write_end(struct file *file, struct address_space *mapping, unsigned from = pos & (PAGE_SIZE - 1); int err; - buffer = kmap(page); + buffer = kmap_thread(page); err = write_file(FILE_HOSTFS_I(file)->fd, &pos, buffer + from, copied); - kunmap(page); + kunmap_thread(page); if (!PageUptodate(page) && err == PAGE_SIZE) SetPageUptodate(page); -- 2.28.0.rc0.12.gb6a658bd00c9
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