https://github.com/torvalds/linux
Revision 31383c6865a578834dd953d9dbc88e6b19fe3997 authored by Dan Williams on 30 November 2017, 00:10:28 UTC, committed by Linus Torvalds on 30 November 2017, 02:40:42 UTC
Patch series "device-dax: fix unaligned munmap handling"
When device-dax is operating in huge-page mode we want it to behave like
hugetlbfs and fail attempts to split vmas into unaligned ranges. It
would be messy to teach the munmap path about device-dax alignment
constraints in the same (hstate) way that hugetlbfs communicates this
constraint. Instead, these patches introduce a new ->split() vm
operation.
This patch (of 2):
The device-dax interface has similar constraints as hugetlbfs in that it
requires the munmap path to unmap in huge page aligned units. Rather
than add more custom vma handling code in __split_vma() introduce a new
vm operation to perform this vma specific check.
Link: http://lkml.kernel.org/r/151130418135.4029.6783191281930729710.stgit@dwillia2-desk3.amr.corp.intel.com
Fixes: dee410792419 ("/dev/dax, core: file operations and dax-mmap")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 95a8798
Tip revision: 31383c6865a578834dd953d9dbc88e6b19fe3997 authored by Dan Williams on 30 November 2017, 00:10:28 UTC
mm, hugetlbfs: introduce ->split() to vm_operations_struct
mm, hugetlbfs: introduce ->split() to vm_operations_struct
Tip revision: 31383c6
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| README | -rw-r--r-- | 722 bytes |
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