Messages in this thread | | | Date | Mon, 29 Sep 2003 13:18:10 +0200 | From | Lionel Bouton <> | Subject | Re: [BUG?] SIS IDE DMA errors |
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Vojtech Pavlik said the following on 09/26/2003 07:53 PM:
>On Fri, Sep 26, 2003 at 07:27:35PM +0200, M?ns Rullg?rd wrote: > > >>Vojtech Pavlik <vojtech@suse.cz> writes: >> >> >> >>>Actually, it's me who wrote the 961 and 963 support. It works fine for >>>most people. Did you check you cabling? >>> >>> >>I'm dealing with a laptop, but I suppose I could wiggle the cables a >>bit. I still doubt it's a cable problem, since reading works >>flawlessly. >> >> > >Hmm, that's indeed interesting and it'd point to a driver problem - >when reading, the drive is dictating the timing, but when writing, it's >the controllers turn. > >So if the controller timing is not correctly programmed, reads function, >but writes don't. > >Can you send me the output of 'lspci -vvxxx' of the IDE device? >I'll take a look to see if it looks correct. > > > >>It appears to me that during heavy IO load, some DMA interrupts get >>lost, for some reason. >> >> > >Well, I've got this feeling that not just IDE interrupts get lost under >heavy IO load with recent kernels ... > > >
This could explain some odd reports. Amongst the usual causes like flaky hardware, kernel misconfiguration and the likes, I encountered some people for which IO-APIC support would throw their data away...
Now I always ask the users to recompile without IO-APIC, this usually brings other problems (awful ethernet perfs for one user comes to my mind) but tends to solve IDE instability.
Until today, I've not a single report where lspci -vxxx highlighted any IDE register misconfiguration, AFAICS your code *is* correct Vojtech.
LB.
-- Lionel Bouton - inet6 --------------------------------------------------------------------- o Siege social: 51, rue de Verdun - 92158 Suresnes / _ __ _ Acces Bureaux: 33 rue Benoit Malon - 92150 Suresnes / /\ /_ / /_ France \/ \/_ / /_/ Tel. +33 (0) 1 41 44 85 36 Inetsys S.A. Fax +33 (0) 1 46 97 20 10
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