forked from luck/tmp_suning_uos_patched
3a27203102
* Fix a livelock in dax_layout_busy_page() present since v4.18. The lockup triggers when truncating an actively mapped huge page out of a mapping pinned for direct-I/O. * Fix mprotect() clobbers of _PAGE_DEVMAP. Broken since v4.5 mprotect() clears this flag that is needed to communicate the liveness of device pages to the get_user_pages() path. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJbwiZhAAoJEB7SkWpmfYgCYFoQAL8ED6c1bfGUPRsWSrTRChU0 ungVZ/Vf1+2ERd3ivUXPQzahNtqH5EWvEVp0aboVpyJUoVllrztInVS2hxaGJE+e w7WnzaXh36MY0kvLpK+Ny1Cxk7qg2rXnmzOAPRVdSUoSvh0TXOn5HFX1i/OdI7WK wgJwXraCoyKP9aTItw7oHQy9S36bi1RJVUakOAoEpEx4Vn+fwFxLNIt34G5CRJ+k iflicM7CPngxlFzwfoiX9v3DhV7toexk1A4LAzzwypG0Aiqd5tW2FG1lwLMPncNk 8FezBm9VjkMwzv6hj7nD9UfU2lbh3GqqGDW0cPX1DPSgDxr/4pOLtKcbYWHh6yas NtCXk37q90ey3GtD2wYBRkBNly6UWvHJ0d3srtO6ZSl1VN6JQu8rhVhQ6KnON24B NcWlEVf2brqf0uaW4byCVbdVfIDp96/qgEvCo1pq3olXwCdDyOBJjYxaBcnu5JDV YsItMCJ49AxS/qoCt3vam7vC5TGhfYHL5xJPaF06cdjYvgfqOIV3VQT1ujBx4cvh MBFRBKDc6oDiJFgkrdYqHwJfn5fCQVS180Oy5S0AFGsVAzsJalKBZBLx2f2RQn8c r+kczvvPjpczEeEqzaqsxTgjowo/75Q8PRXc2PbwQzNxfkHuKf+xxQpnUg0mN6Hf w8zPSaCcCs2Wo21Kd/ua =VXnU -----END PGP SIGNATURE----- Merge tag 'libnvdimm-fixes-4.19-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Dan writes: "libnvdimm/dax 4.19-rc8 * Fix a livelock in dax_layout_busy_page() present since v4.18. The lockup triggers when truncating an actively mapped huge page out of a mapping pinned for direct-I/O. * Fix mprotect() clobbers of _PAGE_DEVMAP. Broken since v4.5 mprotect() clears this flag that is needed to communicate the liveness of device pages to the get_user_pages() path." * tag 'libnvdimm-fixes-4.19-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: mm: Preserve _PAGE_DEVMAP across mprotect() calls filesystem-dax: Fix dax_layout_busy_page() livelock |
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