Messages in this thread |  | | | Date | Mon, 20 Jun 2011 13:50:00 -0400 | | From | Rik van Riel <> | | Subject | Re: [PATCH 1/3] mm: completely disable THP by transparent_hugepage=never |
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On 06/20/2011 01:34 PM, Cong Wang wrote:
> Even if it is really 10K, why not save it since it doesn't > much effort to make this. ;) Not only memory, but also time, > this could also save a little time to initialize the kernel. > > For me, the more serious thing is the logic, there is > no way to totally disable it as long as I have THP in .config > currently. This is why I said the design is broken.
There are many things you cannot totally disable as long as they are enabled in the .config. Think about things like swap, or tmpfs - neither of which you are going to use in the crashdump kernel.
I believe we need to keep the kernel optimized for common use and convenience.
Crashdump is very much a corner case. Yes, using less memory in crashdump is worthwhile, but lets face it - the big memory user there is likely to be the struct page array, with everything else down in the noise...
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