Messages in this thread | | | Date | Mon, 24 Nov 2014 14:55:42 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH v3 3/8] mm/debug-pagealloc: make debug-pagealloc boottime configurable |
| |
On Mon, 24 Nov 2014 17:15:21 +0900 Joonsoo Kim <iamjoonsoo.kim@lge.com> wrote:
> Now, we have prepared to avoid using debug-pagealloc in boottime. So > introduce new kernel-parameter to disable debug-pagealloc in boottime, > and makes related functions to be disabled in this case. > > Only non-intuitive part is change of guard page functions. Because > guard page is effective only if debug-pagealloc is enabled, turning off > according to debug-pagealloc is reasonable thing to do. > > ... > > --- a/Documentation/kernel-parameters.txt > +++ b/Documentation/kernel-parameters.txt > @@ -858,6 +858,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted. > causing system reset or hang due to sending > INIT from AP to BSP. > > + disable_debug_pagealloc > + [KNL] When CONFIG_DEBUG_PAGEALLOC is set, this > + parameter allows user to disable it at boot time. > + With this parameter, we can avoid allocating huge > + chunk of memory for debug pagealloc and then > + the system will work mostly same with the kernel > + built without CONFIG_DEBUG_PAGEALLOC. > +
Weren't we going to make this default to "off", require a boot option to turn debug_pagealloc on?
| |