Re: xfs vs. jfs results: why?

[Jens Axboe <axboe@suse.de>]

On Mon, Jan 20 2003, Seth Mos wrote:
> At 19:20 19-1-2003 -0800, LA Walsh wrote:
> >CONCLUSION:
> >We are not able to reproduce the excellent numbers described at:
> >http://home.fnal.gov/~yocum/storageServerTechnicalNote.html
> >It appears that the best performance for read-orientated and mixed
> >workloads is obtained with JFS, for write-orientated XFS.
> >---
> >From page: http://pcbunn.cacr.caltech.edu/gae/3ware_raid_tests.htm
> 
> Since you are using 2.4.19. Did you compile this kernel with HIGMEM and 
> HIGHMEM IO?
> 
> There have been some performance problems in 2.4.19 if you did not have 
> HIGHMEM IO turned on.

2.4.19 did not have the block highmem feature, so that's not correct.
2.4.20, as released, does not have the bug either. It was in the -pre
series.

-- 
Jens Axboe