Messages in this thread | | | Date | Wed, 31 Dec 2003 17:26:26 +0000 (GMT) | From | Ged Haywood <> | Subject | Re: All filesystems hang under long periods of heavy load (read and write) on a filesystem |
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Hi Marcelo,
On Mon, 29 Dec 2003, Marcelo Tosatti wrote:
> > there is certainly something nasty in the released 2.4.23 IDE code... > > The attached patch from Daniel Lux should fix it. Its has just been > applied to the 2.4 BK tree. > > Please try it.
Thanks very much for the patch, I can see how that piece of code could well be causing the problem.
Between my message and your reply, someone else came up with another clue for me and I found that enabling DMA for the drive appears if not to fix the problem at least to avoid it fairly well. I think using DMA for most of the transfers makes it less likely that the lockup will be triggered. At least this gets me out of the immediate bind.
It's a busy machine and it's a little painful to keep rebooting it. I'm going to put an identical one together for testing. When I've done that I'll test the patch to destruction.
It will be a couple of weeks before I can get to the bench to do it, but then it should only take a few hours to be sure it's a good fix. I'll certainly get back to you with the results.
Thanks again for the pointer.
73, Ged.
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