Received: by 2002:ac0:aed5:0:0:0:0:0 with SMTP id t21csp4697010imb; Wed, 6 Mar 2019 21:21:16 -0800 (PST) X-Google-Smtp-Source: APXvYqz44H8fF28dwrQgamPRnfNnkUAzB63hcv3uCJJF7D5RT67RbsqkUF8NfB48ZtgekTqZnto/ X-Received: by 2002:a17:902:6b47:: with SMTP id g7mr11220652plt.100.1551936075978; Wed, 06 Mar 2019 21:21:15 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1551936075; cv=none; d=google.com; s=arc-20160816; b=V+F7C8OFnr7S+h3e+ToO5X9jZLpg+pZ0WkYOWk1blON2TBzoHSZmd20wZF8ZlKCR7s 8HH+VBOk6WwNup77D5csdGwrGqQuTYJc2LSktUcehaPUZgS1z6Jf+paS4n/lf0ou11UH Ju61ABuhvmhKd8bB/lG2j/893iaD6YeHe1KtNMW6jZsAgkD+JXNRQcU7r1gpPZY9/5lY AJNyO2tSgJJPHBZkoVH9/41WqacYNfrbNFku+9RezkftaRrUnqGHtjL7g+LASYAqUIIx A0wjwTQsdY+O6xa53RWh6fJ7LpaD5DOxivvkWkRCejqO4/LkQ+pKo0LMdK+4gnXJJVQG kYDg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from; bh=bq6ovzR0ptmGjKmWVZbnEhTY1oXXndK+QmnWVct5eM0=; b=AvHisWoC+61aw1vdUVqXLI2jV1N8Md0cjDZxU4IvkWZgvtHPjdjSnDlJ8b8vS/WRhD mrs5WJNNrhg5gNE9C/xS8sDf3TSOeZxgIICsb5gYm5rn8aIegeFcz2SKScByIG0u9bP6 he/AHsw1ILnj3r1vvcPgxGZyXPeuqt6deH3H8nSWWrpTBTbSGjB5XofP58avHKGa42SW 8Byzm9P9h2nBTNHCjGftO1YUuBkaNG6/OIGBcEfO+O1qr1oW09tNSx+xsE2muAAuWiWV j3YnEFArOIUhMyRrqOrmWAYFMt5OVbdStuQ2+LevBgNRsG/EFLXI4cxiDliV7gHtESte OZkQ== ARC-Authentication-Results: i=1; mx.google.com; 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; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q5si3068997pgc.425.2019.03.06.21.21.00; Wed, 06 Mar 2019 21:21:15 -0800 (PST) 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; 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; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726264AbfCGFUk (ORCPT + 99 others); Thu, 7 Mar 2019 00:20:40 -0500 Received: from out30-44.freemail.mail.aliyun.com ([115.124.30.44]:37160 "EHLO out30-44.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725799AbfCGFUk (ORCPT ); Thu, 7 Mar 2019 00:20:40 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R231e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e07487;MF=shile.zhang@linux.alibaba.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_---0TM9p0ws_1551935730; Received: from e18g09479.et15sqa.tbsite.net(mailfrom:shile.zhang@linux.alibaba.com fp:SMTPD_---0TM9p0ws_1551935730) by smtp.aliyun-inc.com(127.0.0.1); Thu, 07 Mar 2019 13:15:41 +0800 From: shile.zhang@linux.alibaba.com To: Coly Li , Kent Overstreet Cc: linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, Shile Zhang Subject: [PATCH] bcache: add cond_resched() in __bch_cache_cmp() Date: Thu, 7 Mar 2019 13:15:28 +0800 Message-Id: <1551935728-243664-1-git-send-email-shile.zhang@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shile Zhang Read /sys/fs/bcache//cacheN/priority_stats can take very long time with huge cache after long run. Signed-off-by: Shile Zhang --- drivers/md/bcache/sysfs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 557a8a3..028fea1 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -897,6 +897,7 @@ static void bch_cache_set_internal_release(struct kobject *k) static int __bch_cache_cmp(const void *l, const void *r) { + cond_resched(); return *((uint16_t *)r) - *((uint16_t *)l); } -- 1.8.3.1