Hi, On Tue, Aug 28, 2018 at 09:20:34PM +1000, Nicholas Piggin wrote: > Similarly to the previous patch, this tries to optimise dirty/accessed > bits in ptes to avoid access costs of hardware setting them. > This patch results in silent nios2 boot failures, silent meaning that the boot stalls. ... Unpacking initramfs... Freeing initrd memory: 2168K workingset: timestamp_bits=30 max_order=15 bucket_order=0 jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc. random: fast init done random: crng init done [no further activity until the qemu session is aborted] Reverting the patch fixes the problem. Bisect log is attached. Guenter --- # bad: [387ac6229ecf6e012649d4fc409c5352655a4cf0] Add linux-next specific files for 20180905 # good: [57361846b52bc686112da6ca5368d11210796804] Linux 4.19-rc2 git bisect start 'HEAD' 'v4.19-rc2' # good: [668570e8389bb076bea9b7531553e1362f5abd11] Merge remote-tracking branch 'net-next/master' git bisect good 668570e8389bb076bea9b7531553e1362f5abd11 # good: [7f2f69ebf0bcf3e9bcff7d560ba92cee960a66a6] Merge remote-tracking branch 'battery/for-next' git bisect good 7f2f69ebf0bcf3e9bcff7d560ba92cee960a66a6 # good: [c31458d3e03e3a2edeaab225a22eaf68c07c8290] Merge remote-tracking branch 'rpmsg/for-next' git bisect good c31458d3e03e3a2edeaab225a22eaf68c07c8290 # good: [e0f43dcbe9af8ac72f39fe92c5d0ee1883546427] Merge remote-tracking branch 'nvdimm/libnvdimm-for-next' git bisect good e0f43dcbe9af8ac72f39fe92c5d0ee1883546427 # bad: [f509e2c0f3cd11df238f0f1b5ba013fe726decdf] of: ignore sub-page memory regions git bisect bad f509e2c0f3cd11df238f0f1b5ba013fe726decdf # good: [2f7eebf30b87534f7e4c3982307579d9adc782a5] ocfs2: fix clusters leak in ocfs2_defrag_extent() git bisect good 2f7eebf30b87534f7e4c3982307579d9adc782a5 # good: [119eb88c9dd23e305939ad748237100078e304a8] mm/swapfile.c: call free_swap_slot() in __swap_entry_free() git bisect good 119eb88c9dd23e305939ad748237100078e304a8 # good: [21d64d37adf3ab20b4c3a1951018e84bf815c887] mm: remove vm_insert_pfn() git bisect good 21d64d37adf3ab20b4c3a1951018e84bf815c887 # good: [90cd1a69010844e9dbfc43279d681d798812b962] cramfs: convert to use vmf_insert_mixed git bisect good 90cd1a69010844e9dbfc43279d681d798812b962 # good: [c7dd91289b4bb4c400a8a71953511991815f8e6f] mm/cow: optimise pte dirty/accessed bits handling in fork git bisect good c7dd91289b4bb4c400a8a71953511991815f8e6f # bad: [87d74ae75700a39effcb8c9ed8a8445e719ac369] hexagon: switch to NO_BOOTMEM git bisect bad 87d74ae75700a39effcb8c9ed8a8445e719ac369 # bad: [3d1d5b26ac5b4d4193dc618a50cd88de1fb0d360] mm: optimise pte dirty/accessed bit setting by demand based pte insertion git bisect bad 3d1d5b26ac5b4d4193dc618a50cd88de1fb0d360 # first bad commit: [3d1d5b26ac5b4d4193dc618a50cd88de1fb0d360] mm: optimise pte dirty/accessed bit setting by demand based pte insertion
