Messages in this thread | | | Date | Thu, 24 Sep 2009 11:10:39 +0200 | From | Arjan van de Ven <> | Subject | Re: disk speed regression kernel 2.6.29 and after |
| |
On Wed, 23 Sep 2009 22:06:54 -0500 Will <whansard@sbcglobal.net> wrote:
> > > On Wed, Sep 23, 2009 at 8:08 AM, will <whansard@sbcglobal.net> > > wrote: > > > I had been using an old 2.6.22 kernel on my machine, and I often > > > backup one partition of my main hard drive to a partition on a > > > second hard drive. The main hard drive is sata 640 gigs, and the > > > second is a pata 320 gig. copying this partition from one drive > > > to the other with dd takes about 3 minutes and 30 seconds. When I > > > installed kernel 2.6.30, and 2.6.31, the time took 9 minutes and > > > 20 seconds. I decided to go to the trouble of compiling all the > > > kernels between, and kernels 2.6.22-2.6.28 all do the operation > > > in about 3 > > > > > > the drives > > > with the kernels 2.6.29 and after. > > > Please cc me with any followups or anything. thanks > > 295f00042aaf6b553b5f37348f89bab463d4a469 is first bad commit > commit 295f00042aaf6b553b5f37348f89bab463d4a469 > Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> > Date: Fri Jan 2 16:12:48 2009 +0100 > > ide: don't execute the next queued command from the hard-IRQ > context (v2)
if you're using CONFIG_IDE.... might be worth switching to the LIBATA subsystem instead...
-- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org
| |