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

Ross S. W. Walker

rwalker at medallion.com
Wed Feb 28 02:10:04 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: 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?


______________________________________________________________________
This e-mail, and any attachments thereto, is intended only for use by
the addressee(s) named herein and may contain legally privileged
and/or confidential information. If you are not the intended recipient
of this e-mail, you are hereby notified that any dissemination,
distribution or copying of this e-mail, and any attachments thereto,
is strictly prohibited. If you have received this e-mail in error,
please immediately notify the sender and permanently delete the
original and any copy or printout thereof.




More information about the CentOS-devel mailing list