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 X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05ED9C169C4 for ; Tue, 29 Jan 2019 08:47:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4A3D214DA for ; Tue, 29 Jan 2019 08:47:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=owltronix-com.20150623.gappssmtp.com header.i=@owltronix-com.20150623.gappssmtp.com header.b="rty9DMSz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727402AbfA2Irz (ORCPT ); Tue, 29 Jan 2019 03:47:55 -0500 Received: from mail-lj1-f194.google.com ([209.85.208.194]:37989 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725601AbfA2Irz (ORCPT ); Tue, 29 Jan 2019 03:47:55 -0500 Received: by mail-lj1-f194.google.com with SMTP id c19-v6so16745342lja.5 for ; Tue, 29 Jan 2019 00:47:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=owltronix-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id; bh=C9svzEiZr9kw6t/LWZbdbQcKNuVhxD7bJthkMm/s6+Q=; b=rty9DMSzVoHo9A4/ZNJh8dP09HnUvRgCvzk9VgMduV++IT2+Knm/uvF3WiZoZcDcEV RdJ6fcF4W+HkOMXqBMedqQw0TgqFhCi1oDf/9PLngQNcTyUqNcJdPK2JnIZETjkOtc9g 9Plow6seFCj+sHY+WVVWZUzBATtt1eiJAuXjj6m8zoA66DJpnM8wqzZfR3BJDI1NHf1i oHJ2r9g5TTzTJ+Q0ywrhON7FzRiAhhoc5ZhF5H06jyT8GSh6dhlj2UXZRaDG3aVi9kFJ tGK76c664XER/Rpwwigjb8iyimKyaShFkmr9F44/xZKYJeMmdB09i6fK6pbJDNaMzoXk /AFA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=C9svzEiZr9kw6t/LWZbdbQcKNuVhxD7bJthkMm/s6+Q=; b=aA9/xsywsnpPLeZYBxmGs1bT/FGge2Tj/15YF2mPSAjk2QSgBEssd9FKQLXvwM5HfJ e6qPPl8Zgzd1KS0AaVdcfqEbm4/BnCH4r+o2IZueACek0lbt4yB/MIxUJ0csAnWZNCV9 t5Ea8XF2Ygd8Do0X5LECktH4+58Imt8TlKMEPxyhCpzcfleRfi3q0LZbEyH8L8Vi6CuX QoTnazrHfx7F5bwUImYWe1l7j3W2sjdColSWCcACPRMOP97ZqVfPboBJv8AUT5lsQJAW ZbFhKOYx86bkv2psOXor0qC5trkqQSNXfadoVVYrQkRS/IdIyQO1ORb+C1Pj/IjPQgx3 c4zg== X-Gm-Message-State: AJcUukfc0PlaHgY0Iq8eAQidCE7DqL5yPZMt5P2H01dbLAz5ll6TrCi6 Mp/doIKWwcsM1WyDz+5PGqMgrQ== X-Google-Smtp-Source: ALg8bN7qYnhugcn+cuKakkGqvuRe79CiOo9sM1YfkFbZdQSef8htQXHUcwSUQwVHfiBuae6G7Z7BQg== X-Received: by 2002:a2e:6109:: with SMTP id v9-v6mr19353883ljb.126.1548751672483; Tue, 29 Jan 2019 00:47:52 -0800 (PST) Received: from ch-lap-hans.bredbandsbolaget.se (c-0bf2e055.03-91-6d6c6d4.bbcust.telenor.se. [85.224.242.11]) by smtp.gmail.com with ESMTPSA id c22sm3418800lfd.88.2019.01.29.00.47.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Jan 2019 00:47:51 -0800 (PST) From: hans@owltronix.com To: Matias Bjorling Cc: javier@javigon.com, Zhoujie Wu , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Hans Holmberg Subject: [PATCH] lightnvm: pblk: extend line wp balance check Date: Tue, 29 Jan 2019 09:47:37 +0100 Message-Id: <20190129084737.718-1-hans@owltronix.com> X-Mailer: git-send-email 2.17.1 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Hans Holmberg pblk stripes writes of minimal write size across all non-offline chunks in a line, which means that the maximum write pointer delta should not exceed the minimal write size. Extend the line write pointer balance check to cover this case. Signed-off-by: Hans Holmberg --- This patch applies on top of Zhoujie's V3 of "lightnvm: pblk: ignore bad block wp for pblk_line_wp_is_unbalanced drivers/lightnvm/pblk-recovery.c | 60 ++++++++++++++++++++------------ 1 file changed, 37 insertions(+), 23 deletions(-) diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c index 02d466e6925e..d86f580036d3 100644 --- a/drivers/lightnvm/pblk-recovery.c +++ b/drivers/lightnvm/pblk-recovery.c @@ -302,41 +302,55 @@ static int pblk_pad_distance(struct pblk *pblk, struct pblk_line *line) return (distance > line->left_msecs) ? line->left_msecs : distance; } -static int pblk_line_wp_is_unbalanced(struct pblk *pblk, - struct pblk_line *line) +/* Return a chunk belonging to a line by stripe(write order) index */ +static struct nvm_chk_meta *pblk_get_stripe_chunk(struct pblk *pblk, + struct pblk_line *line, + int index) { struct nvm_tgt_dev *dev = pblk->dev; struct nvm_geo *geo = &dev->geo; - struct pblk_line_meta *lm = &pblk->lm; struct pblk_lun *rlun; - struct nvm_chk_meta *chunk; struct ppa_addr ppa; - u64 line_wp; - int pos, i, bit; + int pos; - bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); - if (bit >= lm->blk_per_line) - return 0; - rlun = &pblk->luns[bit]; + rlun = &pblk->luns[index]; ppa = rlun->bppa; pos = pblk_ppa_to_pos(geo, ppa); - chunk = &line->chks[pos]; - line_wp = chunk->wp; + return &line->chks[pos]; +} - for (i = bit + 1; i < lm->blk_per_line; i++) { - rlun = &pblk->luns[i]; - ppa = rlun->bppa; - pos = pblk_ppa_to_pos(geo, ppa); - chunk = &line->chks[pos]; +static int pblk_line_wps_are_unbalanced(struct pblk *pblk, + struct pblk_line *line) +{ + struct pblk_line_meta *lm = &pblk->lm; + int blk_in_line = lm->blk_per_line; + struct nvm_chk_meta *chunk; + u64 max_wp, min_wp; + int i; - if (chunk->state & NVM_CHK_ST_OFFLINE) - continue; + i = find_first_zero_bit(line->blk_bitmap, blk_in_line); + + /* If there is one or zero good chunks in the line, + * the write pointers can't be unbalanced. + */ + if (i >= (blk_in_line - 1)) + return 0; - if (chunk->wp > line_wp) + chunk = pblk_get_stripe_chunk(pblk, line, i); + max_wp = chunk->wp; + if (max_wp > pblk->max_write_pgs) + min_wp = max_wp - pblk->max_write_pgs; + else + min_wp = 0; + + i = find_next_zero_bit(line->blk_bitmap, blk_in_line, i + 1); + while (i < blk_in_line) { + chunk = pblk_get_stripe_chunk(pblk, line, i); + if (chunk->wp > max_wp || chunk->wp < min_wp) return 1; - else if (chunk->wp < line_wp) - line_wp = chunk->wp; + + i = find_next_zero_bit(line->blk_bitmap, blk_in_line, i + 1); } return 0; @@ -362,7 +376,7 @@ static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line, int ret; u64 left_ppas = pblk_sec_in_open_line(pblk, line) - lm->smeta_sec; - if (pblk_line_wp_is_unbalanced(pblk, line)) + if (pblk_line_wps_are_unbalanced(pblk, line)) pblk_warn(pblk, "recovering unbalanced line (%d)\n", line->id); ppa_list = p.ppa_list; -- 2.17.1