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[209.132.180.67]) by mx.google.com with ESMTP id 142-v6si9391123pga.694.2018.06.29.20.05.40; Fri, 29 Jun 2018 20:05:54 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linux-foundation.org header.s=google header.b=AU5yijqm; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936028AbeF3CWR (ORCPT + 99 others); Fri, 29 Jun 2018 22:22:17 -0400 Received: from mail-it0-f49.google.com ([209.85.214.49]:52341 "EHLO mail-it0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935515AbeF3CWN (ORCPT ); Fri, 29 Jun 2018 22:22:13 -0400 Received: by mail-it0-f49.google.com with SMTP id p4-v6so5375815itf.2 for ; Fri, 29 Jun 2018 19:22:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=JcyxqYYcay/Qsr52+haYXlxp2B0gkYov29mUd/11po8=; b=AU5yijqmW/ZaRQlKskFG6uFzFrK/RSpbOpkmevd5USL2Ee6mvT0QTldhSyTEJxBGc+ h2IY/pQcDef3SbQwRExsqNMB9jDSG+rKh3bwdA21L/hO6J42qH8uyjrc25udQJd8wjgL qftqCxy+xpO7Smk5R4MbyFHONZzen9s9jdFcM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=JcyxqYYcay/Qsr52+haYXlxp2B0gkYov29mUd/11po8=; b=l628ikpvfpFCETO9qNNymOvNA4DkiCrcOo4yncV3bWDNLFbnDL8/n01b2uUHxEBryP 3cOjAq7u0VD9mTJP4Lf/izf5gLpKeB9haXVl5E76lDRLf6uQ/dRBPYD2ksZZKwd7SxLG 6bxxhqvzAaEmuM6HoFEG0oZPugwPnpPEXtZlKOrGYBBA9q1gcA9Z74XweGEUdx395Z7m zVrUAgk5nP3PBfDC28LVUKbVwyw6nDwrWOVCwwdWXIrFn9r1eeO7qn24Z3z6OecIegN/ DaqvYR8lHt4fcvEbG+bi2TTjIiKJ2mN4UR9OAHo82vGQxpPdDtt2Om/j/M7SPNGsu24Y jaLA== X-Gm-Message-State: APt69E0643afmT9IwhUyai79Stvalm/0cZ28OL5F2RpPi050OxslhefM 6TLDPa2PZDh3WvKGdZ2HR0fRNsR9mr/pDHdQupU= X-Received: by 2002:a02:664b:: with SMTP id l11-v6mr14520665jaf.70.1530325332255; Fri, 29 Jun 2018 19:22:12 -0700 (PDT) MIME-Version: 1.0 References: <99169786-61dd-b19c-ac81-84bcd0a67de4@lwfinger.net> <20180629214647.mkgpni6hxj7aore4@kshutemo-mobl1> In-Reply-To: <20180629214647.mkgpni6hxj7aore4@kshutemo-mobl1> From: Linus Torvalds Date: Fri, 29 Jun 2018 19:22:01 -0700 Message-ID: Subject: Re: [Update] Regression in 4.18 - 32-bit PowerPC crashes on boot - bisected to commit 1d40a5ea01d5 To: "Kirill A. Shutemov" Cc: aneesh.kumar@linux.ibm.com, Larry Finger , Matthew Wilcox , "Kirill A. Shutemov" , Vlastimil Babka , Christoph Lameter , Dave Hansen , Jerome Glisse , Lai Jiangshan , Martin Schwidefsky , Pekka Enberg , Randy Dunlap , Andrey Ryabinin , Andrew Morton , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , ppc-dev , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 29, 2018 at 2:46 PM Kirill A. Shutemov wrote: > > Looks like pgtable_page_dtor() gets called in __pte_free_tlb() path twice. > Once in __pte_free_tlb() itself and the second time in pgtable_free(). Ahh, that would certainly do it,. and explains why this hits ppc32 but not x86, for example. Linus