Messages in this thread | | | Subject | Re: [RFC v2 PATCH 4/4] mm: pre zero out free pages to speed up page allocation for __GFP_ZERO | From | Dave Hansen <> | Date | Mon, 4 Jan 2021 11:19:13 -0800 |
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On 12/21/20 8:30 AM, Liang Li wrote: > --- a/include/linux/page-flags.h > +++ b/include/linux/page-flags.h > @@ -137,6 +137,9 @@ enum pageflags { > #endif > #ifdef CONFIG_64BIT > PG_arch_2, > +#endif > +#ifdef CONFIG_PREZERO_PAGE > + PG_zero, > #endif > __NR_PAGEFLAGS,
I don't think this is worth a generic page->flags bit.
There's a ton of space in 'struct page' for pages that are in the allocator. Can't we use some of that space?
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