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Shutemov" To: Andrew Morton , Mel Gorman , Vlastimil Babka , David Hildenbrand Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" , Richard Weinberger , Anton Ivanov , Johannes Berg Subject: [PATCH 02/10] um: Fix MAX_ORDER usage in linux_main() Date: Wed, 15 Mar 2023 14:31:25 +0300 Message-Id: <20230315113133.11326-3-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230315113133.11326-1-kirill.shutemov@linux.intel.com> References: <20230315113133.11326-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 6940E4001D X-Stat-Signature: or5me4wn78hpupwhgnafcbydoicgmtgj X-Rspam-User: X-HE-Tag: 1678879904-85497 X-HE-Meta: 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 ou48sG3R Bb6+TW99KfOTxLw2CpRY8oockfAdCcnk58W807Xh9Ra4IpMa6v7/C1nDv80RBKt6VxXlkbh3rLatxR7Mx2pOXOOO89Ipou/ssLjIzS37vEx8QU5DcqSTfyI/8eVuHMviZCQkX7yh17gy3HR4aUOaxFmeWTA95xNmx83y78T7+mzhix8A27oeQ4wj+IbxwdFpwUyECqUT6fyBuNchsC4Nq4RWIE7hhjYUd025p4u+94MfFbCmn75MI4ZJ38UyyKZmN+Fdz1gWnPeRk0OnMompuz2N9taOchc4lD8jprZjWC+NZKNaO1LY3emgb6W2CBRqamE13 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: MAX_ORDER is not inclusive: the maximum allocation order buddy allocator can deliver is MAX_ORDER-1. Fix MAX_ORDER usage in linux_main(). Signed-off-by: Kirill A. Shutemov Cc: Richard Weinberger Cc: Anton Ivanov Cc: Johannes Berg Acked-by: Mike Rapoport (IBM) Acked-by: Vlastimil Babka --- arch/um/kernel/um_arch.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 8dcda617b8bf..5e5a9c8e0e5d 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -368,10 +368,10 @@ int __init linux_main(int argc, char **argv) max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC; /* - * Zones have to begin on a 1 << MAX_ORDER page boundary, + * Zones have to begin on a 1 << MAX_ORDER-1 page boundary, * so this makes sure that's true for highmem */ - max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1); + max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER - 1)) - 1); if (physmem_size + iomem_size > max_physmem) { highmem = physmem_size + iomem_size - max_physmem; physmem_size -= highmem;