Re: very low performance on SCSI disks if device node is in tmpfs

[Olaf Hering]

 On Tue, May 25, Andrew Morton wrote:

> Andrew Morton <akpm@xxxxxxxx> wrote:
> >
> > Everything there is consistent with "not doing readahead".
> >
> 
> 
> 
> We need to set file->f_ra _after_ calling blkdev_open(), when inode->i_mapping
> points at the right thing.  And we need to get it from
> inode->i_mapping->host->i_mapping too, which represents the underlying device.

That fixed it, thanks for the patch and the award!
I will take the patch and pass the award to the guy who found the bug.

-- 
USB is for mice, FireWire is for men!

sUse lINUX ag, nÃRNBERG
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