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NFS Hanging Under Heavy Load
by Aaron Blew 02 Apr '12

02 Apr '12

Hello all, I'm currently experiencing an issue with an NFS server I've built (a Dell R710 with a Dell PERC H800/LSI 2108 and four external disk trays). It's a backup target for Solaris 10, CentOS 5.5 and CentOS 6.2 servers that mount it's data volume via NFS. It has two 10gig NICs set up in a layer2+3 bond for one network, and two more 10gig NICs set up in the same way in another network. The host has a 99T XFS filesystem for the backups. RPCNFSDCOUNT is set to 256. During backups from clients the system exhibits odd hangs that interfere with some of our sensitive system's backup windows. On the NFS server side we see the following in dmesg. Originally I thought it was related to dirty writeback cache, but I adjusted dirty_writeback_centisecs and am still seeing the issue. dmesg during the problem window: Mar 16 07:01:21 *****store01 kernel: __ratelimit: 11 callbacks suppressed Mar 16 07:01:21 *****store01 kernel: nfsd: page allocation failure. order:2, mode:0x20 Mar 16 07:01:21 *****store01 kernel: Pid: 6041, comm: nfsd Not tainted 2.6.32-220.4.2.el6.x86_64 #1 Mar 16 07:01:21 *****store01 kernel: Call Trace: Mar 16 07:01:21 *****store01 kernel: <IRQ> [<ffffffff81123daf>] ? __alloc_pages_nodemask+0x77f/0x940 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8115dc62>] ? kmem_getpages+0x62/0x170 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8115e87a>] ? fallback_alloc+0x1ba/0x270 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8115e2cf>] ? cache_grow+0x2cf/0x320 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8115e5f9>] ? ____cache_alloc_node+0x99/0x160 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8142186a>] ? __alloc_skb+0x7a/0x180 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8115f4bf>] ? kmem_cache_alloc_node_notrace+0x6f/0x130 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8115f6fb>] ? __kmalloc_node+0x7b/0x100 Mar 16 07:01:21 *****store01 kernel: [<ffffffff81461e65>] ? ip_rcv+0x275/0x350 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8142186a>] ? __alloc_skb+0x7a/0x180 Mar 16 07:01:21 *****store01 kernel: [<ffffffff814219e6>] ? __netdev_alloc_skb+0x36/0x60 Mar 16 07:01:21 *****store01 kernel: [<ffffffffa0188104>] ? ixgbe_alloc_rx_buffers+0x2c4/0x380 [ixgbe] Mar 16 07:01:21 *****store01 kernel: [<ffffffff8127f980>] ? swiotlb_map_page+0x0/0x100 Mar 16 07:01:21 *****store01 kernel: [<ffffffffa0189158>] ? ixgbe_clean_rx_irq+0x818/0x8b0 [ixgbe] Mar 16 07:01:21 *****store01 kernel: [<ffffffffa01895ff>] ? ixgbe_clean_rxtx_many+0x10f/0x220 [ixgbe] Mar 16 07:01:21 *****store01 kernel: [<ffffffff814307c3>] ? net_rx_action+0x103/0x2f0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff81072001>] ? __do_softirq+0xc1/0x1d0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff810d9390>] ? handle_IRQ_event+0x60/0x170 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8107205a>] ? __do_softirq+0x11a/0x1d0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8100c24c>] ? call_softirq+0x1c/0x30 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8100de85>] ? do_softirq+0x65/0xa0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff81071de5>] ? irq_exit+0x85/0x90 Mar 16 07:01:21 *****store01 kernel: [<ffffffff814f4c85>] ? do_IRQ+0x75/0xf0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8100ba53>] ? ret_from_intr+0x0/0x11 Mar 16 07:01:21 *****store01 kernel: <EOI> [<ffffffff8105673f>] ? finish_task_switch+0x4f/0xe0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff814ec9ce>] ? thread_return+0x4e/0x760 Mar 16 07:01:21 *****store01 kernel: [<ffffffff81123741>] ? __alloc_pages_nodemask+0x111/0x940 Mar 16 07:01:21 *****store01 kernel: [<ffffffff814ed7b2>] ? schedule_timeout+0x192/0x2e0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8107c0a0>] ? process_timeout+0x0/0x10 Mar 16 07:01:21 *****store01 kernel: [<ffffffffa0319415>] ? svc_recv+0x5a5/0x850 [sunrpc] Mar 16 07:01:21 *****store01 kernel: [<ffffffff8105e7f0>] ? default_wake_function+0x0/0x20 Mar 16 07:01:21 *****store01 kernel: [<ffffffffa03fcb45>] ? nfsd+0xa5/0x160 [nfsd] Mar 16 07:01:21 *****store01 kernel: [<ffffffffa03fcaa0>] ? nfsd+0x0/0x160 [nfsd] Mar 16 07:01:21 *****store01 kernel: [<ffffffff81090726>] ? kthread+0x96/0xa0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8100c14a>] ? child_rip+0xa/0x20 Mar 16 07:01:21 *****store01 kernel: [<ffffffff81090690>] ? kthread+0x0/0xa0 Mar 16 07:01:21 *****store01 kernel: [<ffffffff8100c140>] ? child_rip+0x0/0x20 xfs_info: # xfs_info /data meta-data=/dev/sdb1 isize=256 agcount=99, agsize=268435200 blks = sectsz=512 attr=2 data = bsize=4096 blocks=26367491584, imaxpct=1 = sunit=256 swidth=9216 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal bsize=4096 blocks=521728, version=2 = sectsz=512 sunit=8 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 cat /etc/centos-release: CentOS release 6.2 (Final) uname -a: Linux *****store01 2.6.32-220.4.2.el6.x86_64 #1 SMP Tue Feb 14 04:00:16 GMT 2012 x86_64 x86_64 x86_64 GNU/Linux lspci output: 00:00.0 Host bridge: Intel Corporation 5520 I/O Hub to ESI Port (rev 13) 00:01.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 1 (rev 13) 00:03.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 3 (rev 13) 00:04.0 PCI bridge: Intel Corporation 5520/X58 I/O Hub PCI Express Root Port 4 (rev 13) 00:05.0 PCI bridge: Intel Corporation 5520/X58 I/O Hub PCI Express Root Port 5 (rev 13) 00:06.0 PCI bridge: Intel Corporation 5520/X58 I/O Hub PCI Express Root Port 6 (rev 13) 00:07.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 7 (rev 13) 00:09.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 9 (rev 13) 00:14.0 PIC: Intel Corporation 5520/5500/X58 I/O Hub System Management Registers (rev 13) 00:14.1 PIC: Intel Corporation 5520/5500/X58 I/O Hub GPIO and Scratch Pad Registers (rev 13) 00:14.2 PIC: Intel Corporation 5520/5500/X58 I/O Hub Control Status and RAS Registers (rev 13) 00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02) 00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02) 00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02) 00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02) 00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02) 00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) 00:1f.0 ISA bridge: Intel Corporation 82801IB (ICH9) LPC Interface Controller (rev 02) 00:1f.2 IDE interface: Intel Corporation 82801IB (ICH9) 2 port SATA Controller [IDE mode] (rev 02) 01:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20) 01:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20) 02:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20) 02:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20) 03:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08) 04:00.0 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01) 04:00.1 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01) 05:00.0 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01) 05:00.1 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01) 06:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05) 08:03.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200eW WPCM450 (rev 0a) /etc/sysctl.conf changes: net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 2621440 16777216 net.ipv4.tcp_wmem = 4096 2621440 16777216 net.core.netdev_max_backlog = 250000 net.ipv4.route.flush = 1 net.ipv4.tcp_window_scaling = 1 vm.dirty_writeback_centisecs = 50 Has anyone else seem similar issues? I can provide additional details about the server/configuration if anybody needs anything else. The issue only seems to occur under high write load as we've restored some of these backups and didn't seem to have an issue reading the data. Thanks all, -Aaron

2 4

CentOS-announce Digest, Vol 86, Issue 1
by centos-announce-request＠centos.org 02 Apr '12

02 Apr '12

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CEBA-2012:0437 CentOS 5 device-mapper-multipath Update (Johnny Hughes) 2. CEBA-2012:0438 CentOS 5 wget Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Mon, 2 Apr 2012 10:07:19 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:0437 CentOS 5 device-mapper-multipath Update To: centos-announce(a)centos.org Message-ID: <20120402100719.GA31412(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:0437 Upstream details at : https://rhn.redhat.com/errata/RHBA-2012-0437.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: c3582da63aa309fe94d47999728557129a20e9f8a4ab6162a2eac8af073e5b7d device-mapper-multipath-0.4.7-48.el5_8.1.i386.rpm 468adaa8336a85d21ccefb88a08b38c2d411f0266676205f7fcfc6d6d946fdc5 kpartx-0.4.7-48.el5_8.1.i386.rpm x86_64: 9a51f3a313b84b021dfae9da9356da939f0d98c88bc6bb22f7ddba5f2f465b6c device-mapper-multipath-0.4.7-48.el5_8.1.x86_64.rpm d6ba1caaf305ec296475d9455ed63104319d523757937da72c4334cd282a0ef0 kpartx-0.4.7-48.el5_8.1.x86_64.rpm Source: d11883b6398301cc006afcc013f51a4cc335919145618a100f4921e8ab28d9d7 device-mapper-multipath-0.4.7-48.el5_8.1.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Mon, 2 Apr 2012 10:08:10 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:0438 CentOS 5 wget Update To: centos-announce(a)centos.org Message-ID: <20120402100810.GA31520(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:0438 Upstream details at : https://rhn.redhat.com/errata/RHBA-2012-0438.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 29cc5f23ca9efa0bf4ad70af470a03bcdc251af5703c130c34d097b82a6454fb wget-1.11.4-3.el5_8.1.i386.rpm x86_64: 625142aae0c51fb0641e09c061acaf94bec686448284fcf3374118e5b189b740 wget-1.11.4-3.el5_8.1.x86_64.rpm Source: 19a2f7dc5a3f3a2fc71debae96c86f0605171006c769a0a1023e1c289fdd1b96 wget-1.11.4-3.el5_8.1.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 86, Issue 1 **********************************************

1 0

Grails 1.3.x (S)RPM for CentOS 6?
by Patrick Lists 02 Apr '12

02 Apr '12

Hi, My Google foo came up empty. Does anyone know where I can find a Grails 1.3.x (S)RPM? Thanks! Patrick

2 2

SPF Setup CentOS 6.3 x86_64
by Prabhpal S. Mavi 02 Apr '12

02 Apr '12

Dear Friends Greetings, i wish to setup SPF look up f0r Postfix on CentOS 6.2. I could not find any document on the net describing the procedure. is anyone have documentation i can follow to setup the SPF please? Thanks / Regards Prabhpal S. Mavi

3 3

Postfix problems with maximum messages size
by James B. Byrne 01 Apr '12

01 Apr '12

CentOS-6.2 I am confused. I need to accept messages somewhat larger than the default 10M allowed by Postfix. However, changing the message_size_limit in /etc/postfix/main.cf is having no effect. Squirrelmail is configured to accept and transmit messages up to 24M and this identical configuration is working on a Sendmail installation. So the problem appears to me to be strictly at Postfix matter. # grep message_size_limit /etc/postfix/* /etc/postfix/main.cf:message_size_limit = 20480000 # postfix reload postfix/postfix-script: refreshing the Postfix mail system # postconf -n | grep size_limit message_size_limit = 20480000 smtp message generated to squirrelmail client Message not sent. Server replied: Requested mail action aborted: exceeding storage allocation 552 5.2.3 Message exceeds maximum fixed size (12000000) What is going on? Why am I unable to have configured limit of 20M take effect? -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

3 2

SMTP Port 465 - Postfix
by Prabhpal S. Mavi 31 Mar '12

31 Mar '12

Greetings Dear Friends ! i have Postfix Running On CentOS 6.2 x86_64, TLS/SASL is already configured and working. Can anyone please assist me how to configure Postfix to listen and accept TLS connections on smtp:465? Thanks / Regards Prabhpal S. Mavi

7 14

nfslock
by m.roth＠5-cent.us 31 Mar '12

31 Mar '12

I just updated one of our servers to 5.8, and rebooted. In the logs, I saw a bunch of Mar 21 16:29:02 <server> rpc.statd[9783]: recv_rply: can't decode RPC message! Mar 21 16:29:33 <server> last message repeated 442 times Mar 21 16:30:34 <server> last message repeated 835 times Mar 21 16:31:36 <server> last message repeated 884 times Mar 21 16:32:38 <server> last message repeated 856 times Mar 21 16:32:44 <server> last message repeated 111 times I tried restarting nfslock, and that *appears* to have fixed it. Googling, I found a thread about that at <http://nerdbynature.de/s9y/archives/2009/08.html>, which suggests that it's starting too early, possibly before portmap is running. Anyone else see this? Has an old bug snuck back in? mark

10 18

About Postfix mail server using dovecot and courier imap configuration
by jiten jha 31 Mar '12

31 Mar '12

Dear Friends, I am new in server side so i want to configure new Postfix mail server using dovecot or courier imap configuration . But I want courier for configure server . I do not want any database for store mails and users information. It just like create users then all mail goes to users home folder. Like useradd /home/jiten/ then all mail store in my jiten folders. Please help me it is urgent for me. -- Regards Jitendra Jha

3 3

Problem with PHP / Postgresql on CentOS6.2
by Rudinei Dias 31 Mar '12

31 Mar '12

HI. I have instaled a WEB server with Postgresql on CentOS 6.2. PostgreSQL, versin 9.1.3 x64 from EntrrpriseDB base *.run*. PHP with PDO from YUM using reposity versions. On start apache does not get error. PHP LOG under, with PDO error. *PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/pdo_pgsql.so' - libpq.so.5: failed to map segment from shared object: Permission denied in Unknown on line 0 *PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/pdo_pgsql.so' - libpq.so.5: failed to map segment from shared object: Permission denied in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/xsl.so' - libxslt.so.1: failed to map segment from shared object: Permission denied in Unknown on line 0 [Tue Mar 27 09:35:17 2012] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.0-fips configured -- resuming normal operations I try to reinstall all PHP modules and get this messages Installing : php-xml-5.3.3-3.el6_2.6.x86_64 14/24 Installing : php-intl-5.3.3-3.el6_2.6.x86_64 15/24 Installing : php-embedded-5.3.3-3.el6_2.6.x86_64 16/24 */sbin/ldconfig: /opt/PostgreSQL/psqlODBC/lib/libpq.so.5 is not a symbolic link* Installing : php-soap-5.3.3-3.el6_2.6.x86_64 17/24 Installing : php-mbstring-5.3.3-3.el6_2.6.x86_64 18/24 Installing : php-snmp-5.3.3-3.el6_2.6.x86_64 19/24 PostgreSQL an APACHE runs normal and PHP does not recognize php_pgsql/pdo_pgsql. How i fix this mess? Thanks. -------------------------------------- Rudinei Dias

7 10

Linux on touch screen device
by Nataraj 30 Mar '12

30 Mar '12

I have poked around in google and have seen a number of youtube videos, but my question is whether anyone really has linux running on any kind of tablet or tablet PC device in such a way that the touch screen can be used productively and it won't take a month to get it running? Initially the two applications that are of most interest to me would be a good web browser (maybe chromium) and thunderbird. I would also like to have a decent on screen keyboard which could be used to ssh to servers in an emergency. I've seen instructions for booting linux on various devices, but many people doing this are using keyboards and not touchscreens. Do applications like thunderbird have to be modified in order to work well with a touch screen or is just getting a working driver for the touchpad sufficient? If anyone has any experience with this I would appreciate knowing what hardware your running on and what linux distro/desktop environment you use. I've been interested in devices like the ASUS EP121 which is a dual core I5, so it wouldn't be necessary to have an ARM distribution. Also the newest Asus transformer prime (arm) which I think is about 2 months away sounds interesting. Nataraj

5 6

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