Messages in this thread | | | Subject | Re: [PATCH v5 0/8] huge vmalloc mappings | From | Christophe Leroy <> | Date | Fri, 21 Aug 2020 07:47:57 +0200 |
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Le 21/08/2020 à 06:44, Nicholas Piggin a écrit : > I made this powerpc-only for the time being. It shouldn't be too hard to > add support for other archs that define HUGE_VMAP. I have booted x86 > with it enabled, just may not have audited everything.
I like this series, but if I understand correctly it enables huge vmalloc mappings only for hugepages sizes matching a page directory levels, ie on a PPC32 it would work only for 4M hugepages.
On the 8xx, we only have 8M and 512k hugepages. Any change that it can support these as well one day ?
Christophe
> > Hi Andrew, would you care to put this in your tree? > > Thanks, > Nick > > Since v4: > - Fixed an off-by-page-order bug in v4 > - Several minor cleanups. > - Added page order to /proc/vmallocinfo > - Added hugepage to alloc_large_system_hage output. > - Made an architecture config option, powerpc only for now. > > Since v3: > - Fixed an off-by-one bug in a loop > - Fix !CONFIG_HAVE_ARCH_HUGE_VMAP build fail > - Hopefully this time fix the arm64 vmap stack bug, thanks Jonathan > Cameron for debugging the cause of this (hopefully). > > Since v2: > - Rebased on vmalloc cleanups, split series into simpler pieces. > - Fixed several compile errors and warnings > - Keep the page array and accounting in small page units because > struct vm_struct is an interface (this should fix x86 vmap stack debug > assert). [Thanks Zefan] > > Nicholas Piggin (8): > mm/vmalloc: fix vmalloc_to_page for huge vmap mappings > mm: apply_to_pte_range warn and fail if a large pte is encountered > mm/vmalloc: rename vmap_*_range vmap_pages_*_range > lib/ioremap: rename ioremap_*_range to vmap_*_range > mm: HUGE_VMAP arch support cleanup > mm: Move vmap_range from lib/ioremap.c to mm/vmalloc.c > mm/vmalloc: add vmap_range_noflush variant > mm/vmalloc: Hugepage vmalloc mappings > > .../admin-guide/kernel-parameters.txt | 2 + > arch/Kconfig | 4 + > arch/arm64/mm/mmu.c | 12 +- > arch/powerpc/Kconfig | 1 + > arch/powerpc/mm/book3s64/radix_pgtable.c | 10 +- > arch/x86/mm/ioremap.c | 12 +- > include/linux/io.h | 9 - > include/linux/vmalloc.h | 13 + > init/main.c | 1 - > mm/ioremap.c | 231 +-------- > mm/memory.c | 60 ++- > mm/page_alloc.c | 4 +- > mm/vmalloc.c | 456 +++++++++++++++--- > 13 files changed, 476 insertions(+), 339 deletions(-) >
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