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[209.85.220.65]) by mx.google.com with SMTPS id m78sor17457116lfa.53.2019.07.30.15.34.12 for (Google Transport Security); Tue, 30 Jul 2019 15:34:12 -0700 (PDT) Received-SPF: pass (google.com: domain of urezki@gmail.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=bujwWf5J; spf=pass (google.com: domain of urezki@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=urezki@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:date:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=W9OGjlOiuGBttY9lHWx9LPxLd92PhSuHcIdfhpDpvoE=; b=bujwWf5JLRuD+uv5Vrf6d7xtiko4y6kxVh+VdzTzfqqt+SpAWjyUJCBjcOb2/0YUhT mtAWzoMhWMY5VROhMuCppQSSfaS05+Tl5kLPPrrWb4TrtPSMiGS8mLATh0hjQFkTYBPL IjyMsioCx8axzjOVtU00KN38V+wSg+lHhEbWgHiqSn/OwYRZSY+PieKWShFOOmps33ie cWMNRxIzZ7FX+rqRhqtIP7gIy4/YLO8q1jIyJvVAWoD4aosRFdFHuia/fAIx4NEibCFU rF8A9HhEKJkPTx0fQb9KudSvs8iSSyxmfEkqBMtVzYg4HhSqUTNHwwHUmoetDzxi7o3R vEOw== X-Google-Smtp-Source: APXvYqylT1lor/fMtz/TfmJWdVozDsoadnNBs90hKZzNMn/xJ08p79neC6t1NdK546O9Gk3EmXgArA== X-Received: by 2002:a19:f711:: with SMTP id z17mr55960460lfe.4.1564526051873; Tue, 30 Jul 2019 15:34:11 -0700 (PDT) Received: from pc636 ([37.212.215.48]) by smtp.gmail.com with ESMTPSA id v4sm13656948lji.103.2019.07.30.15.34.09 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 30 Jul 2019 15:34:10 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Wed, 31 Jul 2019 00:34:00 +0200 To: sathyanarayanan kuppuswamy Cc: Dave Hansen , Uladzislau Rezki , akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1 1/1] mm/vmalloc.c: Fix percpu free VM area search criteria Message-ID: <20190730223400.hzsyjrxng2s5gk4u@pc636> References: <20190729232139.91131-1-sathyanarayanan.kuppuswamy@linux.intel.com> <20190730204643.tsxgc3n4adb63rlc@pc636> <9fdd44c2-a10e-23f0-a71c-bf8f3e6fc384@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9fdd44c2-a10e-23f0-a71c-bf8f3e6fc384@linux.intel.com> User-Agent: NeoMutt/20170113 (1.7.2) 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: Hello, Sathyanarayanan. > > I agree with Dave. I don't think this issue is related to NUMA. The problem > here is about the logic we use to find appropriate vm_area that satisfies > the offset and size requirements of pcpu memory allocator. > > In my test case, I can reproduce this issue if we make request with offset > (ffff000000) and size (600000). > Just to clarify, does it mean that on your setup you have only one area with the 600000 size and 0xffff000000 offset? Thank you. -- Vlad Rezki