lkml.org 
[lkml]   [2001]   [Nov]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Unresponiveness of 2.4.16
At Mon, 26 Nov 2001 14:44:19 -0800,
Lincoln Dale <ltd@cisco.com> wrote:
> At 10:17 PM 26/11/2001 +0000, Alan Cox wrote:
> > > 2.4.16 becomes very unresponsive for 30 seconds or so at a time during
> > > large unarchiving of tarballs, like tar -zxf mozilla-src.tar.gz. The
> > > file is about 36mb. I run top in one window, run free repeatedly in
> >
> >This seems to be one of the small as yet unresolved problems with the newer
> >VM code in 2.4.16. I've not managed to prove its the VM or the differing
> >I/O scheduling rules however.
>
> it is I/O scheduling.
>
> i have a system with a large amount of RAM.
> it has both 15K RPM SCSI disks (off a symbios controller) and some bog-slow
> IDE/ATA disks which the system decides to use PIO for rather than DMA. (i
> don't use them for anything other than bootup so don't really care about it
> deciding to use PIO..).
>
> a copy to/from the 15K RPM SCSI disks doesn't show any performance problems.
> a copy to/from the PIO-based IDE disks has the same effect -- 20/30 seconds
> of no interactiveness -- even a "vmstat 1" *stops* for 20-30 seconds while
> 200+MB of buffer-cache data gets written out to disk.

I guess this problem repeatly posted...
Is it related with IDE chip or chipset code?
I use Athlon on KT133A plus 2 IDE disks, and I'm also experiencing
such problem with only 1 disk. But I don't know it's PIO-based or not.

-- gotom



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:13    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site