lkml.org 
[lkml]   [2009]   [Mar]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Linux 2.6.29
On Thu, 26 Mar 2009, Jens Axboe wrote:
> On Thu, Mar 26 2009, Hugh Dickins wrote:
> >
> > So, directing a barrier (WRITE_BARRIER or DISCARD_BARRIER) to a range
> > of sectors in one partition interposes a barrier into the queue of I/O
> > across (all partitions of) that whole device.
>
> Correct
>
> > I think that's not how filesystems really want barriers to behave,
> > and might tend to discourage us from using barriers more freely.
> > But I have zero appreciation of whether it's a significant issue
> > worth non-trivial change - just wanted to get it out into the open.
>
> Per-partition definitely makes sense. The problem is that we do sorting
> on a per-device basis right now. But it's a good point, I'll try and
> take a look at how much work it would be to make it per-partition
> instead. It wont be trivial :-)

Thanks, that would be interesting.
Trivial bores you anyway, doesn't it?

Hugh


\
 
 \ /
  Last update: 2009-03-26 20:09    [W:0.405 / U:0.208 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site