Messages in this thread | | | Date | Wed, 29 Jan 2003 19:45:42 -0000 | From | Alex Bligh - linux-kernel <> | Subject | LKML I/O scheduling (was Re: Bootscreen [had to throw in 2 cents worth, sorry]) |
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Rob,
--On 29 January 2003 10:31 -0500 Rob Wilkens <robw@optonline.net> wrote:
[huge snip]
> p.s. I'm hoping this thread is about the possibility of putting some > sort of graphical bootscreen up. I'm tuning in late, so if I'm on the > wrong page, just ignore me.
The LKML message I/O scheduling rules suggest that if a fair number of reads are not processed prior to write activity, then a lot of bandwidth can be wasted and the medium can eventually become write-only due to messsage storms. This can be avoided by ensuring writers block to allow their read activity to progress first - the write should in general be dependent on the reads in any case. As per Andrew Morton's post on anticipatory scheduling, a short delay before doing the write to allow further reads to take place is often a good idea in this context too.
-- Alex Bligh - 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/
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