Messages in this thread | | | Date | Sun, 1 Dec 2002 13:37:49 +0100 (CET) | From | Rasmus Bøg Hansen <> | Subject | Re: [PROBLEM] NFS trouble - file corruptions |
| |
On 29 Nov 2002, Alan Cox wrote:
> On Fri, 2002-11-29 at 13:17, Rasmus Bøg Hansen wrote: > > I just tried turning off DMA on the server disk (this is just a low-end > > IDE-system): No errors in files (compressing the file thrice). > > > > So it does not at all seem to be a NFS-issue! > > > > I have no idea what is wrong. If the disk, cable or IDE controller does > > bit-flipping when DMA is turned on, why is the problem only seen with > > NFS? I have never seem corrupted files or metadata with DMA turned > > (except once long ago, when I experimented with high-transfer-modes - I > > haven't done that since)... > > More likely it changes the timings. There is at least one other > possibility though. With some via bridges using slightly too slow DDR > RAM at a 133MHz clock works reliably _until_ you get a mix of CPU and > DMA traffic. It'll even pass memtest86.
I couldn't solve the problem by setting timing parameters...
However, the RTL8139-driver is now configured for PIO-mode instead of MMIO-mode (CONFIG_8139TOO_PIO), and I don't see corruptions anymore.
Thank you all for your help!
/Rasmus
-- -- [ Rasmus "Møffe" Bøg Hansen ] --------------------------------------- Life is that property, which a being will lose as a result of falling out of a cold and mysterious cave 30 miles above ground level. - HitchHikers Guide to the Galaxy, Douglas Adams ----------------------------------[ moffe at amagerkollegiet dot dk ] --
- 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/
| |