Re: [PATCH v5 2/3] mm: init: report memory auto-initialization features at boot time
From: Andrew Morton <akpm@linux-foundation.org>
Date: 2019-06-01 01:18:36
Also in:
linux-mm
On Wed, 29 May 2019 14:38:11 +0200 Alexander Potapenko [off-list ref] wrote:
Print the currently enabled stack and heap initialization modes. The possible options for stack are: - "all" for CONFIG_INIT_STACK_ALL; - "byref_all" for CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL; - "byref" for CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF; - "__user" for CONFIG_GCC_PLUGIN_STRUCTLEAK_USER; - "off" otherwise. Depending on the values of init_on_alloc and init_on_free boottime options we also report "heap alloc" and "heap free" as "on"/"off".
Why? Please fully describe the benefit to users so that others can judge the desirability of the patch. And so they can review it effectively, etc. Always!
In the init_on_free mode initializing pages at boot time may take some time, so print a notice about that as well.
How much time?