Messages in this thread | | | From | Bartlomiej Zolnierkiewicz <> | Subject | Re: [PATCH 1/3] Make the IDE DMA timeout modifiable | Date | Sat, 16 Jun 2007 01:23:55 +0200 |
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On Tuesday 12 June 2007, Sergei Shtylyov wrote: > Bartlomiej Zolnierkiewicz wrote: > >>On Feb 20, 2007, at 5:44 PM, Bartlomiej Zolnierkiewicz wrote: > > >>>On Wednesday 21 February 2007 02:19, Suleiman Souhlal wrote: > > >>>>It can be changed via /proc/ide/hd?/settings. > > >>>Why do we need to change IDE DMA timeout dynamically? > > >>I've used it to test error recovery (for example). > > > Seems quite useable for developers but I would prefer not to > > expose it in production kernels for end users. > > It seems that I have counter example of a customer asking if this timeout > can be done configurable. :-)
May I ask what was the rationale for this request?
I have no strong feelings about adding this /proc/ide/ setting but I worry that it could be (mis)used just to (unreliably) work-around problems...
> BTW, why the timeout is so damn long? 2*WAIT_CMD is 20 secs, and if DMA is > not complete or interrupt pending, it may wait 10 more secs...
I really don't remember... :)
Maybe Mark or Alan could help with figuring this out.
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