Le 17/05/2022 à 14:37, Michael Ellerman a écrit : > Christophe Leroy <christophe.le...@csgroup.eu> writes: >> Le 15/05/2022 à 12:28, Michael Ellerman a écrit : >>> On Tue, 22 Mar 2022 16:40:17 +0100, Christophe Leroy wrote: >>>> This series reduces by 70% the time required to activate >>>> ftrace on an 8xx with CONFIG_STRICT_KERNEL_RWX. >>>> >>>> Measure is performed in function ftrace_replace_code() using mftb() >>>> around the loop. >>>> >>>> With the series, >>>> - Without CONFIG_STRICT_KERNEL_RWX, 416000 TB ticks are measured. >>>> - With CONFIG_STRICT_KERNEL_RWX, 546000 TB ticks are measured. >>>> >>>> [...] >>> >>> Patches 1, 3 and 4 applied to powerpc/next. >>> >>> [1/4] powerpc/code-patching: Don't call is_vmalloc_or_module_addr() without >>> CONFIG_MODULES >>> >>> https://git.kernel.org/powerpc/c/cb3ac45214c03852430979a43180371a44b74596 >>> [3/4] powerpc/code-patching: Use jump_label for testing freed initmem >>> >>> https://git.kernel.org/powerpc/c/b033767848c4115e486b1a51946de3bee2ac0fa6 >>> [4/4] powerpc/code-patching: Use jump_label to check if poking_init() is >>> done >>> >>> https://git.kernel.org/powerpc/c/1751289268ef959db68b0b6f798d904d6403309a >>> >> >> Patch 2 was the keystone of this series. What happened to it ? > > It broke on 64-bit. I think I know why but I haven't had time to test > it. Will try and get it fixed in the next day or two. >
You didn't find any solution at the end, or didn't have time ? What was the problem exactly ? I made a quick try on QEMU and it was working as expected. Christophe
