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Shutemov" To: Naresh Kamboju Cc: Andrew Morton , linux- stable , linux-mm , "Joel Fernandes (Google)" , William Kucharski , Julia Lawall , Michal Hocko , Will Deacon , Greg Kroah-Hartman , lkft-triage@lists.linaro.org, Mike Kravetz , LTP List Subject: Re: mm/mremap.c : WARNING: at mm/mremap.c:211 move_page_tables+0x5b0/0x5d0 Message-ID: <20200404160631.7eny3swsqn665m2p@box> References: <20200402133849.mmkvekzx37kw4nsj@box> <20200403133252.ivdqoppxhc6w5b47@box> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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: On Sat, Apr 04, 2020 at 08:10:42PM +0530, Naresh Kamboju wrote: > On Fri, 3 Apr 2020 at 19:02, Kirill A. Shutemov wrote: > > > > On Fri, Apr 03, 2020 at 12:56:57AM +0530, Naresh Kamboju wrote: > > > [ 734.876355] old_addr: 0xbfe00000, new_addr: 0xbfc00000, old_end: 0xc0000000 > > > > The ranges are overlapping. We don't expect it. mremap(2) never does this. > > > > shift_arg_pages() only moves range downwards. It should be safe. > > > > Could you try this: > > Applied the patch and tested and still getting kernel warning. > CONFIG_HIGHMEM64G=y is still enabled. > > [ 790.041040] ------------[ cut here ]------------ > [ 790.045664] WARNING: CPU: 3 PID: 3195 at mm/mremap.c:212 > move_page_tables+0x7a7/0x840 Are you sure the patch is applied? The line number in the warning supposed to change. -- Kirill A. Shutemov