Messages in this thread | | | Date | Thu, 8 May 2014 15:34:33 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 2/2] mm/page_alloc: DEBUG_VM checks for free_list placement of CMA and RESERVE pages |
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On Thu, 8 May 2014 15:19:37 +0900 Minchan Kim <minchan@kernel.org> wrote:
> > I also think that VM_DEBUG overhead isn't problem because of same > > reason from Vlastimil. > > Guys, please read this. > > https://lkml.org/lkml/2013/7/17/591 > > If you guys really want it, we could separate it with > CONFIG_DEBUG_CMA or CONFIG_DEBUG_RESERVE like stuff. > Otherwise, just remain in mmotm.
Wise words, those.
Yes, these checks are in a pretty hot path. I'm inclined to make the patch -mm (and -next) only.
Unless there's a really good reason, such as "nobody who uses CMA is likely to be testing -next", which sounds likely :(
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