Peter, I have been using your -v9 backport to 2.6.22 (thanks very much btw) for the last few days on an amd64 system configured like this:
[/],[/home],[/backup],... on top of [lvm2] using [/dev/sdb] which is an [areca hw raid 6 device made up from 8 sata disks] With your patch, performance was much improved. But still there are some seemingly simple tasks which do not work well. Like cp /home/bigfile.txt /backup/bigfile.txt or also rm -r /backup/big-directory They both affect disk access times of other processes very badly. As I said, things improved a quite a bit with your patch, but I wonder if there is more that could be done for this particular setup? A second thing. Since my box has 8GB memory, I am intrigued by the idea of setting dirty_ratio not as a ratio but as an absolute number of kilobytes as it was suggested by Neil Brown with the dirty_kb patch a few months back. Would it make sense to forward port this patch on top of yours ? cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten http://it.oetiker.ch [EMAIL PROTECTED] ++41 62 213 9902 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/