[CentOS-devel] Back-port md raid1/10 BIO_RW_SYNC patch for DRBD

-----Original Message----- · Thu Mar 1 05:42:54 UTC 2007

> -----Original Message-----
> From: centos-devel-bounces at centos.org 
> [mailto:centos-devel-bounces at centos.org] On Behalf Of Ross S. 
> W. Walker
> Sent: Thursday, March 01, 2007 12:24 AM
> To: The CentOS developers mailing list.
> Subject: RE: [CentOS-devel] Back-port md raid1/10 BIO_RW_SYNC 
> patch for DRBD
> 
> > -----Original Message-----
> > From: centos-devel-bounces at centos.org 
> > [mailto:centos-devel-bounces at centos.org] On Behalf Of Ross S. 
> > W. Walker
> > Sent: Thursday, March 01, 2007 12:17 AM
> > To: The CentOS developers mailing list.
> > Subject: RE: [CentOS-devel] Back-port md raid1/10 BIO_RW_SYNC 
> > patch for DRBD
> > 
> > > -----Original Message-----
> > > From: centos-devel-bounces at centos.org 
> > > [mailto:centos-devel-bounces at centos.org] On Behalf Of Ross S. 
> > > W. Walker
> > > Sent: Thursday, March 01, 2007 12:03 AM
> > > To: The CentOS developers mailing list.
> > > Subject: RE: [CentOS-devel] Back-port md raid1/10 BIO_RW_SYNC 
> > > patch for DRBD
> > > 
> > > > -----Original Message-----
> > > > From: centos-devel-bounces at centos.org 
> > > > [mailto:centos-devel-bounces at centos.org] On Behalf Of Ross S. 
> > > > W. Walker
> > > > Sent: Wednesday, February 28, 2007 11:32 AM
> > > > To: The CentOS developers mailing list.
> > > > Subject: RE: [CentOS-devel] Back-port md raid1/10 BIO_RW_SYNC 
> > > > patch for DRBD
> > > > 
> > > > > -----Original Message-----
> > > > > From: centos-devel-bounces at centos.org
> > > > > [mailto:centos-devel-bounces at centos.org] On Behalf Of 
> > > Johnny Hughes
> > > > > Sent: Wednesday, February 28, 2007 10:08 AM
> > > > > To: CentOS-Devel
> > > > > Subject: RE: [CentOS-devel] Back-port md raid1/10 BIO_RW_SYNC
> > > > > patch for DRBD
> > > > >
> > > > > On Wed, 2007-02-28 at 02:08 -0600, Johnny Hughes wrote:
> > > > > > On Tue, 2007-02-27 at 21:10 -0500, Ross S. W. Walker wrote:
> > > > > > > > -----Original Message-----
> > > > > > > > From: centos-devel-bounces at centos.org
> > > > > > > > [mailto:centos-devel-bounces at centos.org] On Behalf 
> > > Of Ross S.
> > > > > > > > W. Walker
> > > > > > > > Sent: Sunday, February 25, 2007 12:24 PM
> > > > > > > > To: centos-devel at centos.org
> > > > > > > > Subject: [CentOS-devel] Back-port md raid1/10 
> BIO_RW_SYNC
> > > > > > > > patch for DRBD
> > > > > > > >
> > > > > > > >
> > > > > > > > Attention CentOS Developers,
> > > > > > > >
> > > > > > > > Here is a back-port of Lars Ellenberg's md raid1/10
> > > > > patch from 2.6.19+
> > > > > > > > to 2.6.9. It seems the md raid1 and raid10 drivers were
> > > > > stripping the
> > > > > > > > BIO_RW_SYNC flags on requests which caused a severe
> > > > > > > > performance penalty
> > > > > > > > for DRBD when writing it's meta-data to these volumes.
> > > > > > > >
> > > > > > > > The patch is attached as well as inlined:
> > > > > > >
> > > > > > > No comments?
> > > > > >
> > > > > > I just put it in the new CentOSPlus kernel (that I am 
> > currently
> > > > > > testing).
> > > > > >
> > > > > > Should be out later today (if it works).
> > > > >
> > > > >
> > > > > OK ... the released CentOS-Plus kernel
> > > > > (2.6.9-42.0.10.plus.c4) has that
> > > > > patch installed on x86_64 and i386 ... and I did install 
> > > it and test
> > > > > with DRBD.  The systems it is on are running OK.
> > > > 
> > > > Excellect, I am currently running the patch on my x86_64 plus 
> > > > kernel here 
> > > > with no problems, and I have the OS booting off of RAID1, I 
> > > have the 
> > > > meta-data as a LVM on the OS vg and no problems and a 
> significant 
> > > > improvement with my large DRBD volumes.
> > > > 
> > > > Lars did review the fixes too and gave them the ok, so 
> it wasn't 
> > > > completely without review.
> > > > 
> > > 
> > > Ok, I just updated to that kernel, 
> > > kernel-2.6.9-42.0.10.plus.c4, and I do not see the patch in there?
> > > 
> > > Did it miss the final cut?
> > 
> > My bad I spoke too soon, it is in there as 
> > linux-2.6.9-raid-bio-rw-sync.patch.
> > 
> > Sorry,
> 
> Again, I don't want to be alarmist but... I think there might 
> be a build
> problem with the latest plus kernel:
> 
> [root at mfg-nyc-iscsi2 make]# rpm -qa | grep kernel | sort
> iscsitarget-kernel-smp-0.4.14-98_2.6.9_42.0.8.plus.c4
> kernel-doc-2.6.9-42.0.10.plus.c4
> kernel-ib-1.0-1
> kernel-module-drbd-2.6.9-42.0.3.plus.c4smp-0.7.21-1.c4
> kernel-module-drbd-2.6.9-42.0.8.plus.c4smp-0.7.23-1.c4
> kernel-smp-2.6.9-42.0.10.EL
> kernel-smp-2.6.9-42.0.8.plus.c4
> kernel-smp-devel-2.6.9-42.0.10.EL
> kernel-utils-2.4-13.1.83
> 
> Looks like the plus kernel dependencies got mixed up...
> 
> [root at mfg-nyc-iscsi2 make]# ls -l /lib/modules/
> total 32
> drwxr-xr-x  3 root root 4096 Feb 28 23:45 2.6.9-42.0.10.ELsmp
> drwxr-xr-x  2 root root 4096 Dec 22 23:13 2.6.9-42.0.3.EL
> drwxr-xr-x  3 root root 4096 Feb  2 17:31 2.6.9-42.0.3.ELsmp
> drwxr-xr-x  4 root root 4096 Feb 24 11:13 2.6.9-42.0.3.plus.c4smp
> drwxr-xr-x  4 root root 4096 Feb 28 23:45 2.6.9-42.0.8.plus.c4smp
> drwxr-xr-x  2 root root 4096 Dec 22 23:12 2.6.9-42.EL
> drwxr-xr-x  2 root root 4096 Feb 27 09:53 kabi-4.0-0smp
> 
> And it's gone and installed the standard kernel.

Some more bad, drbd kernel modules naming convention off:

[root at mfg-nyc-iscsi2 noarch]# yum list available '*kernel*'
Setting up repositories
Reading repository metadata in from local files
Available Packages
kernel.x86_64                            2.6.9-42.0.10.EL       update
kernel-devel.x86_64                      2.6.9-42.0.10.EL       update
kernel-doc.noarch                        2.6.9-42.0.10.plus.c4  centosplus
kernel-largesmp.x86_64                   2.6.9-42.0.10.EL       update
kernel-largesmp-devel.x86_64             2.6.9-42.0.10.EL       update
kernel-module-drbd-2.6.9-42.0.10.EL.x86_ 0.7.23-1.el4.centos    extras
kernel-module-drbd-2.6.9-42.0.10.ELlarge 0.7.23-1.el4.centos    extras
kernel-module-drbd-2.6.9-42.0.10.ELsmp.x 0.7.23-1.el4.centos    extras
kernel-module-drbd-2.6.9-42.0.10.plus.c4 0.7.23-1.el4.centos    extras
kernel-module-drbd-2.6.9-42.0.10.plus.c4 0.7.23-1.el4.centos    extras
kernel-module-drbd-2.6.9-42.0.10.plus.c4 0.7.23-1.el4.centos    extras
kernel-module-drbd-2.6.9-42.0.2.EL.x86_6 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.2.ELlarges 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.2.ELsmp.x8 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.3.EL.x86_6 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.3.ELlarges 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.3.ELsmp.x8 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.3.plus.c4. 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.3.plus.c4l 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.3.plus.c4s 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.0.8.EL.x86_6 0.7.23-1.c4            extras
kernel-module-drbd-2.6.9-42.0.8.ELlarges 0.7.23-1.c4            extras
kernel-module-drbd-2.6.9-42.0.8.ELsmp.x8 0.7.23-1.c4            extras
kernel-module-drbd-2.6.9-42.0.8.plus.c4. 0.7.23-1.c4            extras
kernel-module-drbd-2.6.9-42.0.8.plus.c4l 0.7.23-1.c4            extras
kernel-module-drbd-2.6.9-42.EL.x86_64    0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.ELlargesmp.x 0.7.21-1.c4            extras
kernel-module-drbd-2.6.9-42.ELsmp.x86_64 0.7.21-1.c4            extras
kernel-module-xfs-2.6.9-42.0.10.EL.x86_6 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.10.ELlarges 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.10.ELsmp.x8 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.10.plus.c4. 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.10.plus.c4l 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.10.plus.c4s 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.2.EL.x86_64 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.2.ELlargesm 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.2.ELsmp.x86 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.2.plus.c4.x 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.2.plus.c4la 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.2.plus.c4sm 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.3.EL.x86_64 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.3.ELlargesm 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.3.ELsmp.x86 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.3.plus.c4.x 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.3.plus.c4la 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.3.plus.c4sm 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.8.EL.x86_64 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.8.ELlargesm 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.8.ELsmp.x86 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.8.plus.c4.x 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.8.plus.c4la 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.0.8.plus.c4sm 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.EL.x86_64     0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.ELlargesmp.x8 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.ELsmp.x86_64  0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.plus.c4.x86_6 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.plus.c4larges 0.2-1                  centosplus
kernel-module-xfs-2.6.9-42.plus.c4smp.x8 0.2-1                  centosplus
kernel-smp.x86_64                        2.6.9-42.0.10.EL       update
kernel-smp-devel.x86_64                  2.6.9-42.0.10.EL       update

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