From patchwork Mon Nov 7 19:11:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Petr Vorel X-Patchwork-Id: 623200 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6905FC43217 for ; Mon, 7 Nov 2022 19:12:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232051AbiKGTMM (ORCPT ); Mon, 7 Nov 2022 14:12:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232699AbiKGTL7 (ORCPT ); Mon, 7 Nov 2022 14:11:59 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D199029811; Mon, 7 Nov 2022 11:11:58 -0800 (PST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 92C0F223FD; Mon, 7 Nov 2022 19:11:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1667848317; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=/62V3PSII9/iNCFnoE48lld+IK4eTx+SC7hHh8nq23o=; b=WgtVkftIc2Z3wPesdsvxe6ZknBvfsbSDbMkXt41WvmzyR9nDYcMrmlnsRmlCqVj9XOI6jj 815iC6cDmRIFJsoh7Ul5KdV5PgV3sMJcMh+ql19V4V/TnNTnt3Tqp4uvrWsf30b6EcpSTV cDDpOUup+YflXg3JL5rYUlsLg9EqCjg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1667848317; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=/62V3PSII9/iNCFnoE48lld+IK4eTx+SC7hHh8nq23o=; b=DUL0MFhVynRThScBibdNyfr+9SEf8qDO6U+7QMRcLQuucFCaRLKlr1Omej/8E0MJk0MgGQ Lmwhc/EiygcZGCBg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 711B013AC7; Mon, 7 Nov 2022 19:11:56 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id PaIuGHxYaWMjJgAAMHmgww (envelope-from ); Mon, 07 Nov 2022 19:11:56 +0000 From: Petr Vorel To: ltp@lists.linux.it Cc: Petr Vorel , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Minchan Kim , Nitin Gupta , Sergey Senozhatsky , Jens Axboe , OGAWA Hirofumi , Martin Doucha , Yang Xu Subject: [PATCH 0/1] Possible bug in zram on ppc64le on vfat Date: Mon, 7 Nov 2022 20:11:35 +0100 Message-Id: <20221107191136.18048-1-pvorel@suse.cz> X-Mailer: git-send-email 2.38.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Hi all, following bug is trying to workaround an error on ppc64le, where zram01.sh LTP test (there is also kernel selftest tools/testing/selftests/zram/zram01.sh, but LTP test got further updates) has often mem_used_total 0 although zram is already filled. Patch tries to repeatedly read /sys/block/zram*/mm_stat for 1 sec, waiting for mem_used_total > 0. The question if this is expected and should be workarounded or a bug which should be fixed. REPRODUCE THE ISSUE Quickest way to install only zram tests and their dependencies: make autotools && ./configure && for i in testcases/lib/ testcases/kernel/device-drivers/zram/; do cd $i && make -j$(getconf _NPROCESSORS_ONLN) && make install && cd -; done Run the test (only on vfat) PATH="/opt/ltp/testcases/bin:$PATH" LTP_SINGLE_FS_TYPE=vfat zram01.sh Petr Vorel (1): zram01.sh: Workaround division by 0 on vfat on ppc64le .../kernel/device-drivers/zram/zram01.sh | 27 +++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-)