Hello, The patch "x86/mm/cpa: Add debug mechanism" (https://lore.kernel.org/lkml/20180917143546.078998...@linutronix.de/) caused a thousands of messages during boot on my machine.
They look like below: kernel: CPA protect Text RO: 0xffffffff8affc000 - 0xffffffff8affcfff PFN 12cffc req 0000000000000063 prevent 0000000000000002 kernel: CPA protect Text RO: 0xffffffff8affd000 - 0xffffffff8affdfff PFN 12cffd req 0000000000000063 prevent 0000000000000002 kernel: CPA protect Text RO: 0xffffffff8affe000 - 0xffffffff8affefff PFN 12cffe req 0000000000000063 prevent 0000000000000002 kernel: CPA protect Text RO: 0xffffffff8afff000 - 0xffffffff8affffff PFN 12cfff req 0000000000000063 prevent 0000000000000002 kernel: CPA conflict Rodata RO: 0xffffa2fbece00000 - 0xffffa2fbecffffff PFN 12ce00 req 80000000000000e3 prevent 0000000000000002 kernel: CPA protect Rodata RO: 0xffffa2fbece00000 - 0xffffa2fbece00fff PFN 12ce00 req 8000000000000063 prevent 0000000000000002 kernel: CPA protect Rodata RO: 0xffffa2fbece01000 - 0xffffa2fbece01fff PFN 12ce01 req 8000000000000063 prevent 0000000000000002 kernel: CPA protect Rodata RO: 0xffffa2fbece02000 - 0xffffa2fbece02fff PFN 12ce02 req 8000000000000063 prevent 0000000000000002 The exact reason for those may be related to some out-of-tree patches which I use: https://github.com/anthraxx/linux-hardened/commit/c492687efa253c32972115a5e110e51614af445e#diff-e1f7e9a10ed7feb8c32493438cff8456 https://github.com/anthraxx/linux-hardened/commit/266d16fc47257b2548e6fcbfafebcc5d84d46389#diff-e1f7e9a10ed7feb8c32493438cff8456 but I wonder if those messages shouldn't be rate-limited or hidden behind 'CONFIG_CPA_DEBUG' in general as there may be a chance that someone will trigger something like that with vanillia kernel. Jordan
