Hi Stephen, I've pushed a new libnvdimm-for-next branch that includes the libnvdimm update for 4.15 as well as the MAP_SYNC patch set for -next exposure. It has some collisions with code already pending in -next. My proposed merge resolution is here:
https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git/log/?h= libnvdimm-vs-next-20171102 --- commit 2adeca04276acb4e747dbe7a5668efe03b164566 Merge: fa8785e862ef c29c91a9daa3 Author: Dan Williams <dan.j.willi...@intel.com> Date: Thu Nov 2 19:20:59 2017 -0700 Merge branch 'libnvdimm-for-next' into test diff --cc fs/dax.c index 3652b26a0048,78233c716757..f3a7fb804a50 --- a/fs/dax.c +++ b/fs/dax.c @@@ -825,38 -820,42 +825,42 @@@ out } EXPORT_SYMBOL_GPL(dax_writeback_mapping_range); - static int dax_insert_mapping(struct address_space *mapping, - struct block_device *bdev, struct dax_device *dax_dev, - sector_t sector, size_t size, void *entry, - struct vm_area_struct *vma, struct vm_fault *vmf) + static sector_t dax_iomap_sector(struct iomap *iomap, loff_t pos) { - unsigned long vaddr = vmf->address; - void *ret, *kaddr; - return iomap->blkno + (((pos & PAGE_MASK) - iomap->offset) >> 9); ++ return (iomap->addr + (pos & PAGE_MASK) - iomap->offset) >> 9; + } + + static int dax_iomap_pfn(struct iomap *iomap, loff_t pos, size_t size, + pfn_t *pfnp) + { + const sector_t sector = dax_iomap_sector(iomap, pos); pgoff_t pgoff; + void *kaddr; int id, rc; - pfn_t pfn; + long length; - rc = bdev_dax_pgoff(bdev, sector, size, &pgoff); + rc = bdev_dax_pgoff(iomap->bdev, sector, size, &pgoff); if (rc) return rc; - id = dax_read_lock(); - rc = dax_direct_access(dax_dev, pgoff, PHYS_PFN(size), &kaddr, &pfn); - if (rc < 0) { - dax_read_unlock(id); - return rc; + length = dax_direct_access(iomap->dax_dev, pgoff, PHYS_PFN(size), + &kaddr, pfnp); + if (length < 0) { + rc = length; + goto out; } + rc = -EINVAL; + if (PFN_PHYS(length) < size) + goto out; + if (pfn_t_to_pfn(*pfnp) & (PHYS_PFN(size)-1)) + goto out; + /* For larger pages we need devmap */ + if (length > 1 && !pfn_t_devmap(*pfnp)) + goto out; + rc = 0; + out: dax_read_unlock(id); - - ret = dax_insert_mapping_entry(mapping, vmf, entry, sector, 0); - if (IS_ERR(ret)) - return PTR_ERR(ret); - - trace_dax_insert_mapping(mapping->host, vmf, ret); - if (vmf->flags & FAULT_FLAG_WRITE) - return vm_insert_mixed_mkwrite(vma, vaddr, pfn); - else - return vm_insert_mixed(vma, vaddr, pfn); + return rc; } /* diff --cc fs/ext4/inode.c index 59d31fec67ae,13a198924a0f..7250861f0f7b --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@@ -3383,6 -3393,20 +3383,19 @@@ static int ext4_releasepage(struct pag return try_to_free_buffers(page); } -#ifdef CONFIG_FS_DAX + static bool ext4_inode_datasync_dirty(struct inode *inode) + { + journal_t *journal = EXT4_SB(inode->i_sb)->s_journal; + + if (journal) + return !jbd2_transaction_committed(journal, + EXT4_I(inode)->i_datasync_tid); + /* Any metadata buffers to write? */ + if (!list_empty(&inode->i_mapping->private_list)) + return true; + return inode->i_state & I_DIRTY_DATASYNC; + } + static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length, unsigned flags, struct iomap *iomap) { diff --cc include/linux/iomap.h index a61be86710b5,73e3b7085dbe..a309d611d380 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@@ -21,8 -21,12 +21,13 @@@ struct vm_fault /* * Flags for all iomap mappings: */ -#define IOMAP_F_NEW 0x01 /* blocks have been newly allocated */ +#define IOMAP_F_NEW 0x01 /* blocks have been newly allocated */ +#define IOMAP_F_BOUNDARY 0x02 /* mapping ends at metadata boundary */ + /* + * IOMAP_F_DIRTY indicates the inode has uncommitted metadata needed to access + * written data and requires fdatasync to commit them to persistent storage. + */ -#define IOMAP_F_DIRTY 0x02 ++#define IOMAP_F_DIRTY 0x04 /* * Flags that only need to be reported for IOMAP_REPORT requests:
