Re: [dm-devel] Re: device mapper not reporting no-barrier-support?

2008-02-26 Thread Jens Axboe
On Tue, Feb 26 2008, Anders Henke wrote: > On Tue, Feb 26 2008 Jens Axboe wrote: > > On Tue, Feb 26 2008, Alasdair G Kergon wrote: > > > On Mon, Feb 25, 2008 at 03:20:50PM -0800, Andrew Morton wrote: > > > > On Mon, 25 Feb 2008 14:26:15 +0100 Anders Henke <[EMAIL PROTECTED]> > > > > wrote: > > > >

Re: [dm-devel] Re: device mapper not reporting no-barrier-support?

2008-02-26 Thread Anders Henke
On Tue, Feb 26 2008 Jens Axboe wrote: > On Tue, Feb 26 2008, Alasdair G Kergon wrote: > > On Mon, Feb 25, 2008 at 03:20:50PM -0800, Andrew Morton wrote: > > > On Mon, 25 Feb 2008 14:26:15 +0100 Anders Henke <[EMAIL PROTECTED]> wrote: > > > > I'm currently stuck between Kernel LVM and DRBD, as I'm u

Re: [dm-devel] Re: device mapper not reporting no-barrier-support?

2008-02-26 Thread Jens Axboe
On Tue, Feb 26 2008, Alasdair G Kergon wrote: > On Mon, Feb 25, 2008 at 03:20:50PM -0800, Andrew Morton wrote: > > On Mon, 25 Feb 2008 14:26:15 +0100 Anders Henke <[EMAIL PROTECTED]> wrote: > > > I'm currently stuck between Kernel LVM and DRBD, as I'm using Kernel > > > 2.6.24.2 with DRBD 8.2.5 on

Re: [dm-devel] Re: device mapper not reporting no-barrier-support?

2008-02-25 Thread Alasdair G Kergon
On Mon, Feb 25, 2008 at 03:20:50PM -0800, Andrew Morton wrote: > On Mon, 25 Feb 2008 14:26:15 +0100 Anders Henke <[EMAIL PROTECTED]> wrote: > > I'm currently stuck between Kernel LVM and DRBD, as I'm using Kernel > > 2.6.24.2 with DRBD 8.2.5 on top of an LVM2 device (LV). > > -LVM2/device mapper do

Re: device mapper not reporting no-barrier-support?

2008-02-25 Thread Andrew Morton
On Mon, 25 Feb 2008 14:26:15 +0100 Anders Henke <[EMAIL PROTECTED]> wrote: > Hi, > > I'm currently stuck between Kernel LVM and DRBD, as I'm using Kernel > 2.6.24.2 with DRBD 8.2.5 on top of an LVM2 device (LV). > > -LVM2/device mapper doesn't support write barriers > -DRBD uses blkdev_issue_flu

device mapper not reporting no-barrier-support?

2008-02-25 Thread Anders Henke
Hi, I'm currently stuck between Kernel LVM and DRBD, as I'm using Kernel 2.6.24.2 with DRBD 8.2.5 on top of an LVM2 device (LV). -LVM2/device mapper doesn't support write barriers -DRBD uses blkdev_issue_flush() to flush its metadata to disk. On a no-barrier-device, DRBD should receive EOPNOTSUP