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. Thanks, Johnny Hughes -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: This is a digitally signed message part URL: <http://lists.centos.org/pipermail/centos-devel/attachments/20070228/e11bb638/attachment-0007.sig>