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Miller" , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , John Paul Adrian Glaubitz , "Kirill A. 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U2FsdGVkX19w1SB5BG901zWvIkrGlWNdERQRj1fUW/HVDpDqKTmj8tQcrSIod60d7BCj/eDkhfca0SNzof1sbkLip1H8D3wfGpylBntT27vLKlSIQAjtBZ0RWLcoWOa0EeaEyMg0t3kFWnuodcwJG62Gue2wsZ6HDCZGWL5PM9kUVtzb+Htvwua++wjDbC352KApQaSMU3mU4AyyWI55grRQ354kVx5NeSkBsNxUZ81jch7aVj0zuLR48CnbkhgXEUqpkJaleMqN4zlYrLwLqifH+4zPyLn+rmUUgF8iKKslh1fj/VO0BWVlfZSAAdQxz6m8yZsjB2UIR6/obFgsgzNHv9G6MxboFp8UoQL0QCiXt+R6YuAq0CCllKXcbiPecGsarO1qi7cgCvWhgxTYvDr7g4GpPR7A9o3SfIUJTn0n+ByzIIBmY8vd2NH21wvskMoN5aioneus1JUlZjCkx92D19EgdVM3gfp2P/emTqjRCUKfLgiKm4LhhMCsy9cKjXNvqO46iQBWJrmz9dsRFgJDWV4lVcd9MRj8aQyv/1lgGLexJB+rkWlA0wVI1O5sVawTQvZts4kT8pRmXZIa8V/GXBEEOY2aDBG/qxBDMOsAfNzpqgdIK58W4GoMcjoHkGz+/O5G+5qsihmh/2FPtvxbaITcW2nAuJEZSaE8bTO0cHDBSadC4I2mDM84tSYrv9wn1P3GafLCZr8ZydsT7CJddZvsn+aTQurC0BibhjFx013qKPFDm0U8ODHgT73nMIE4kT7mxHDaVjuzfw+MXAsXGBrx6wlexGyW/EqRH+sCyMGKb+OriO9atgJ94/LbnCaEqnSKNlv9fGU3BCYGj37hcr+2cL4M5fFkHQwGPeCDhhIoj/z8WY6KD5LSJGlg/XyW0U0cS9Bwo2DjA8HezCTa3RBw7tJjpWQvY5aa6mSh0pgsF4pilcLgwewoC2GePYs7GbRncmMi09St+Sk S/k/qGKg 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option. > > Update both to actually describe what this option does. > > Signed-off-by: Mike Rapoport (IBM) > Acked-by: Kirill A. Shutemov > --- > arch/arm64/Kconfig | 24 ++++++++++++------------ > 1 file changed, 12 insertions(+), 12 deletions(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 7324032af859..cdaf52ac4018 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -1487,24 +1487,24 @@ config XEN > # 16K | 27 | 14 | 13 | 1= 1 | > # 64K | 29 | 16 | 13 | 1= 3 | > config ARCH_FORCE_MAX_ORDER > - int "Maximum zone order" if EXPERT && (ARM64_4K_PAGES || ARM64_16K_PA= GES) > + int "Order of maximal physically contiguous allocations" if ARM64_4K_= PAGES || ARM64_16K_PAGES It seems that "if EXPERT" was dropped by accident here. > default "13" if ARM64_64K_PAGES > default "11" if ARM64_16K_PAGES > default "10" > help > - The kernel memory allocator divides physically contiguous memory > - blocks into "zones", where each zone is a power of two number of > - pages. This option selects the largest power of two that the kerne= l > - keeps in the memory allocator. If you need to allocate very large > - blocks of physically contiguous memory, then you may need to > - increase this value. > + The kernel page allocator limits the size of maximal physically > + contiguous allocations. The limit is called MAX_ORDER and it > + defines the maximal power of two of number of pages that can be > + allocated as a single contiguous block. This option allows > + overriding the default setting when ability to allocate very > + large blocks of physically contiguous memory is required. > > - We make sure that we can allocate up to a HugePage size for each co= nfiguration. > - Hence we have : > - MAX_ORDER =3D PMD_SHIFT - PAGE_SHIFT =3D> PAGE_SHIFT - 3 > + The maximal size of allocation cannot exceed the size of the > + section, so the value of MAX_ORDER should satisfy > > - However for 4K, we choose a higher default value, 10 as opposed to = 9, giving us > - 4M allocations matching the default size used by generic code. > + MAX_ORDER + PAGE_SHIFT <=3D SECTION_SIZE_BITS > + > + Don't change if unsure. > > config UNMAP_KERNEL_AT_EL0 > bool "Unmap kernel when running in userspace (aka \"KAISER\")" if EXP= ERT > -- = > 2.35.1 -- Best Regards, Yan, Zi --=_MailMate_C127E265-4DDB-40BB-87AD-DB2006154019_= Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQJDBAEBCgAtFiEE6rR4j8RuQ2XmaZol4n+egRQHKFQFAmQdqkEPHHppeUBudmlk aWEuY29tAAoJEOJ/noEUByhUwaIP/RG0bciGb3wj5HWQeRaRqWKWcktYcPQ7w4Dh 2pGQeKuSL51RphMV2eO9lDSw0fmEyRTvCWVHKaMCD/9leDkY5chAmu7jpb1IUPTp 3jK8kg56Iepg13Gx3EWW1KDE2y/3GarCF6JcVvSuVb0yVsP70XPbMHoS7qgI6WjN vs14YoCZRPSA5OaCRDmrh7bc4UXkU7Biwsg8DiOsZcnjMFm3HJgafOhLQ57UWtQF f6g/uls+c+s1BtCGgZ48iygBq1oJeVn30IkXU/+LeEPGj6qLUXJAcXqTHEXmaW8h tbzaHVog1hMjOYuUoCfH+YAgKQ833P19IST6L2CsGh+LQZC3oPUBA7N2HGVa1RtL YNkHl4nKsh3yX5TxNadzMdfldoW3oBho0GnxaL93gFknFl+sEudEf7ExRJeXaFjo rCVelBEyVCfr0k6pngXCCfs/lw4SYqTb+k+ZbxA+WIgaTqOMUe62wThNnfHrENy6 OKX6UltE6o5l5XbF3T12cmWemZzBWwOVGpWSUxoImM1isuYl+6DmAbZdcDBImY80 lLTKlsK7uc9GfQfOmTCicDT9yTR16alIuxP262DfQryqYcwmHqjDwLLyk1JmdRYp /o94M++puGJfVSMk/3fBkmvVjH/4+J18ZQ/hW4F1pCWz9OSik+y1bOfSovihFeyB 46TBIGnB =WRnA -----END PGP SIGNATURE----- --=_MailMate_C127E265-4DDB-40BB-87AD-DB2006154019_=--