From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cn.fujitsu.com ([59.151.112.132]:55652 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753789AbaKMDIK (ORCPT ); Wed, 12 Nov 2014 22:08:10 -0500 Message-ID: <5464200D.1010600@cn.fujitsu.com> Date: Thu, 13 Nov 2014 11:05:49 +0800 From: Dongsheng Yang MIME-Version: 1.0 To: Cyril Scetbon , Duncan <1i5t5.duncan@cox.net> CC: Subject: Re: Quota question References: <23550138-C487-44E1-AA4A-B3B951D778D1@free.fr> <967D58C4-46E1-4508-A5A9-A0835C18E87D@free.fr> <928A4C3A-2CE4-48E5-8831-BE6C1685ED8B@free.fr> In-Reply-To: <928A4C3A-2CE4-48E5-8831-BE6C1685ED8B@free.fr> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 11/12/2014 10:04 PM, Cyril Scetbon wrote: > Anyone on this ? There is an issue with quotas depending on the write rate. The more we can write before a sync, the more we can exceed quotas limits Hi Cyril, I attempted to reproduce the problem you reported in Linux.3.17, but failed. It seems that the issue in this thread was fixed already. Could you test on Linux.3.17 or later version? Below is my log: [root@atest-guest linux_btrfs]# uname -a Linux atest-guest 3.17.0+ #60 SMP Thu Nov 13 06:51:55 EST 2014 x86_64 x86_64 x86_64 GNU/Linux [root@atest-guest linux_btrfs]# btrfs qgroup show -e /mnt qgroupid rfer excl max_excl -------- ---- ---- -------- 0/5 16384 16384 0 [root@atest-guest linux_btrfs]# btrfs sub create /mnt/sub Create subvolume '/mnt/sub' [root@atest-guest linux_btrfs]# sync [root@atest-guest linux_btrfs]# btrfs qgroup show -e /mnt qgroupid rfer excl max_excl -------- ---- ---- -------- 0/5 16384 16384 0 0/257 16384 16384 0 [root@atest-guest linux_btrfs]# btrfs qgroup limit -e 300M /mnt/sub [root@atest-guest linux_btrfs]# btrfs qgroup show -e /mnt qgroupid rfer excl max_excl -------- ---- ---- -------- 0/5 16384 16384 0 0/257 16384 16384 314572800 [root@atest-guest linux_btrfs]# for((i=0;i<10;i++));do dd if=/dev/zero of=/mnt/sub/data$i bs=6M count=10; done 10+0 records in 10+0 records out 62914560 bytes (63 MB) copied, 0.0401096 s, 1.6 GB/s 10+0 records in 10+0 records out 62914560 bytes (63 MB) copied, 0.0431105 s, 1.5 GB/s 10+0 records in 10+0 records out 62914560 bytes (63 MB) copied, 0.0407304 s, 1.5 GB/s 10+0 records in 10+0 records out 62914560 bytes (63 MB) copied, 0.041441 s, 1.5 GB/s dd: error writing \u2018/mnt/sub/data4\u2019: Disk quota exceeded 10+0 records in 9+0 records out 60817408 bytes (61 MB) copied, 0.0398122 s, 1.5 GB/s dd: error writing \u2018/mnt/sub/data5\u2019: Disk quota exceeded 1+0 records in 0+0 records out 1703936 bytes (1.7 MB) copied, 0.00318793 s, 534 MB/s dd: error writing \u2018/mnt/sub/data6\u2019: Disk quota exceeded 1+0 records in 0+0 records out 0 bytes (0 B) copied, 0.00239674 s, 0.0 kB/s dd: error writing \u2018/mnt/sub/data7\u2019: Disk quota exceeded 1+0 records in 0+0 records out 0 bytes (0 B) copied, 0.002271 s, 0.0 kB/s dd: error writing \u2018/mnt/sub/data8\u2019: Disk quota exceeded 1+0 records in 0+0 records out 0 bytes (0 B) copied, 0.00232063 s, 0.0 kB/s dd: error writing \u2018/mnt/sub/data9\u2019: Disk quota exceeded 1+0 records in 0+0 records out 0 bytes (0 B) copied, 0.00185336 s, 0.0 kB/s [root@atest-guest linux_btrfs]# sync [root@atest-guest linux_btrfs]# btrfs qgroup show -e /mnt qgroupid rfer excl max_excl -------- ---- ---- -------- 0/5 16384 16384 0 0/257 314195968 314195968 314572800