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Date: Sat, 16 Jun 2007 01:23:55 +0200 From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com> To: Sergei Shtylyov <sshtylyov@...mvista.com> Cc: Suleiman Souhlal <ssouhlal@...ebsd.org>, linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/3] Make the IDE DMA timeout modifiable 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. Thanks, Bart - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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