Hi, This patch series enables DAX support for virtio-fs filesystem. Patches are based on 5.3-rc5 kernel and need first patch series posted for virtio-fs support with subject "virtio-fs: shared file system for virtual machines". https://www.redhat.com/archives/virtio-fs/2019-August/msg00281.html Enabling DAX seems to improve performance for most of the operations in general a great deal. I have reported performance numbers in first patch series so I am not repeating these here. Any comments or feedback is welcome. Thanks Vivek Sebastien Boeuf (3): virtio: Add get_shm_region method virtio: Implement get_shm_region for PCI transport virtio: Implement get_shm_region for MMIO transport Stefan Hajnoczi (4): dax: remove block device dependencies fuse, dax: add fuse_conn->dax_dev field virtio_fs, dax: Set up virtio_fs dax_device fuse, dax: add DAX mmap support Vivek Goyal (12): dax: Pass dax_dev to dax_writeback_mapping_range() fuse: Keep a list of free dax memory ranges fuse: implement FUSE_INIT map_alignment field fuse: Introduce setupmapping/removemapping commands fuse, dax: Implement dax read/write operations fuse: Define dax address space operations fuse, dax: Take ->i_mmap_sem lock during dax page fault fuse: Maintain a list of busy elements dax: Create a range version of dax_layout_busy_page() fuse: Add logic to free up a memory range fuse: Release file in process context fuse: Take inode lock for dax inode truncation drivers/dax/super.c | 3 +- drivers/virtio/virtio_mmio.c | 32 + drivers/virtio/virtio_pci_modern.c | 108 +++ fs/dax.c | 89 +- fs/ext2/inode.c | 2 +- fs/ext4/inode.c | 2 +- fs/fuse/cuse.c | 3 +- fs/fuse/dir.c | 2 + fs/fuse/file.c | 1206 +++++++++++++++++++++++++++- fs/fuse/fuse_i.h | 99 ++- fs/fuse/inode.c | 138 +++- fs/fuse/virtio_fs.c | 134 +++- fs/xfs/xfs_aops.c | 2 +- include/linux/dax.h | 12 +- include/linux/virtio_config.h | 17 + include/uapi/linux/fuse.h | 47 +- include/uapi/linux/virtio_fs.h | 3 + include/uapi/linux/virtio_mmio.h | 11 + include/uapi/linux/virtio_pci.h | 11 +- 19 files changed, 1868 insertions(+), 53 deletions(-) -- 2.20.1
