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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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e1fb4a0864
This patch is reworked from an earlier patch that Dan has posted: https://patchwork.kernel.org/patch/10131727/ VM_MIXEDMAP is used by dax to direct mm paths like vm_normal_page() that the memory page it is dealing with is not typical memory from the linear map. The get_user_pages_fast() path, since it does not resolve the vma, is already using {pte,pmd}_devmap() as a stand-in for VM_MIXEDMAP, so we use that as a VM_MIXEDMAP replacement in some locations. In the cases where there is no pte to consult we fallback to using vma_is_dax() to detect the VM_MIXEDMAP special case. Now that we have explicit driver pfn_t-flag opt-in/opt-out for get_user_pages() support for DAX we can stop setting VM_MIXEDMAP. This also means we no longer need to worry about safely manipulating vm_flags in a future where we support dynamically changing the dax mode of a file. DAX should also now be supported with madvise_behavior(), vma_merge(), and copy_page_range(). This patch has been tested against ndctl unit test. It has also been tested against xfstests commit: 625515d using fake pmem created by memmap and no additional issues have been observed. Link: http://lkml.kernel.org/r/152847720311.55924.16999195879201817653.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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acl.c | ||
acl.h | ||
balloc.c | ||
bitmap.c | ||
block_validity.c | ||
dir.c | ||
ext4_extents.h | ||
ext4_jbd2.c | ||
ext4_jbd2.h | ||
ext4.h | ||
extents_status.c | ||
extents_status.h | ||
extents.c | ||
file.c | ||
fsmap.c | ||
fsmap.h | ||
fsync.c | ||
hash.c | ||
ialloc.c | ||
indirect.c | ||
inline.c | ||
inode.c | ||
ioctl.c | ||
Kconfig | ||
Makefile | ||
mballoc.c | ||
mballoc.h | ||
migrate.c | ||
mmp.c | ||
move_extent.c | ||
namei.c | ||
page-io.c | ||
readpage.c | ||
resize.c | ||
super.c | ||
symlink.c | ||
sysfs.c | ||
truncate.h | ||
xattr_security.c | ||
xattr_trusted.c | ||
xattr_user.c | ||
xattr.c | ||
xattr.h |