From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 577F6C4332F for ; Mon, 12 Dec 2022 14:27:26 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 43BB93CBE6B for ; Mon, 12 Dec 2022 15:27:24 +0100 (CET) Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [IPv6:2001:4b78:1:20::6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 2482E3CA4DD for ; Mon, 12 Dec 2022 15:27:15 +0100 (CET) Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-6.smtp.seeweb.it (Postfix) with ESMTPS id ABB881400532 for ; Mon, 12 Dec 2022 15:27:14 +0100 (CET) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id C765D337DC; Mon, 12 Dec 2022 14:27:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1670855233; h=from:from:reply-to:reply-to:date:date:message-id:message-id:to:to: cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ua/5/FVHTVBJVbYXNz/l2byh+C4aJ9gDatMOSbMz6bo=; b=QBnOTnw7Yu5uhFS2rHJ/y1PClxL4rWdkghyI2MJQs5nUr2hyiHkvxwPu5e2BCGiKXwwzUS 2+gXcMS/gbdy1S/pWeHKUrguVsR0bFaW0ok1dIAhGwFrEnH2m+Sj+WOQnFUmwyHO4+j1MC EZqaf7RfPHzX7XqWB0yNK1iLsfL6Mu0= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1670855233; h=from:from:reply-to:reply-to:date:date:message-id:message-id:to:to: cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ua/5/FVHTVBJVbYXNz/l2byh+C4aJ9gDatMOSbMz6bo=; b=shtlK8bHr+JKMV+GjljlgPfZJW1DyTfyXd9p8nkSL5sKJefEFYRfjsfnxSQuF/H7wClue3 3SJcBhsoRMuCd5BA== Received: from g78 (unknown [10.163.28.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by relay2.suse.de (Postfix) with ESMTPS id 79F842C141; Mon, 12 Dec 2022 14:27:13 +0000 (UTC) References: <20221201122844.142062-1-tsahu@linux.ibm.com> <20221201122844.142062-7-tsahu@linux.ibm.com> User-agent: mu4e 1.8.11; emacs 28.2 From: Richard Palethorpe To: Tarun Sahu Date: Mon, 12 Dec 2022 14:26:56 +0000 Organization: Linux Private Site In-reply-to: <20221201122844.142062-7-tsahu@linux.ibm.com> Message-ID: <87zgbsu27z.fsf@suse.de> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.102.4 at in-6.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [PATCH 6/8] Hugetlb: Migrating libhugetlbfs map_high_truncate_2 X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: rpalethorpe@suse.de Cc: aneesh.kumar@linux.ibm.com, ltp@lists.linux.it, sbhat@linux.ibm.com, geetika@linux.ibm.com, vaibhav@linux.ibm.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Hello, Tarun Sahu writes: > Migrating the libhugetlbfs/testcases/map_high_truncate_2.c test > > Test Description: At one stage, a misconversion of hugetlb_vmtruncate_list > to a prio_tree meant that on 32-bit machines, certain combinations of > mapping and truncations could truncate incorrect pages, or > overwrite pmds from other VMAs, triggering BUG_ON()s or other > wierdness. > > Test adapted from an example by Kenneth Chen > > WARNING: The offsets and addresses used within are specifically > calculated to trigger the bug as it existed. Don't mess with them > unless you *really* know what you're doing. > > The kernel bug in question was fixed with > 'commit 856fc2950555 ("[PATCH] hugetlb: fix prio_tree unit")'. > > Signed-off-by: Tarun Sahu Reviewed-by: Richard Palethorpe -- Thank you, Richard. -- Mailing list info: https://lists.linux.it/listinfo/ltp