On Thu, 2011-01-20 at 10:46 +0800, Andrew Morton wrote:
> On Thu, 20 Jan 2011 10:34:18 +0800 Shaohua Li wrote:
>
> > > > Under a harddisk based netbook with Meego, the metadata readahead
> > > > reduced about 3.5s boot time in average from total 16s.
> > >
> > > That's a respectable speedup.
On Thu, 20 Jan 2011 10:34:18 +0800 Shaohua Li wrote:
> > > Under a harddisk based netbook with Meego, the metadata readahead
> > > reduced about 3.5s boot time in average from total 16s.
> >
> > That's a respectable speedup. And it *needs* to be a good speedup,
> > given how hacky all of this
On Thu, 2011-01-20 at 04:34 +0800, Andrew Morton wrote:
> On Wed, 19 Jan 2011 09:15:15 +0800
> Shaohua Li wrote:
>
> > We have file readahead to do asyn file read, but has no metadata
> > readahead. For a list of files, their metadata is stored in fragmented
> > disk space and metadata read is
On Thu, 2011-01-20 at 05:33 +0800, David Nicol wrote:
> On Wed, Jan 19, 2011 at 2:34 PM, Andrew Morton
> wrote:
>
> > It would be much more valuable if those 3.5 seconds were available to
> > devices which really really care about bootup times, but very few of
> > those devices use rotating disks
On Wed, Jan 19, 2011 at 2:34 PM, Andrew Morton
wrote:
> It would be much more valuable if those 3.5 seconds were available to
> devices which really really care about bootup times, but very few of
> those devices use rotating disks nowadays, I expect?
And don't rotating disk modules read and buf
On Wed, 19 Jan 2011 09:15:15 +0800
Shaohua Li wrote:
> We have file readahead to do asyn file read, but has no metadata
> readahead. For a list of files, their metadata is stored in fragmented
> disk space and metadata read is a sync operation, which impacts the
> efficiency of readahead much.
Hi,
We have file readahead to do asyn file read, but has no metadata
readahead. For a list of files, their metadata is stored in fragmented
disk space and metadata read is a sync operation, which impacts the
efficiency of readahead much. The patches try to add meatadata readahead
for btrfs. It ha
