Messages in this thread | | | Date | Fri, 27 Sep 2002 12:58:00 -0700 | From | Andrew Morton <> | Subject | Re: Warning - running *really* short on DMA buffers while doingfiletransfers |
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Andrew Morton wrote: > > ... > One sample trace is at > http://www.zip.com.au/~akpm/linux/patches/trace.txt >
Another thing to note from that trace is that many writes went through the entire submit_bio/elv_next_request/bio_endio cycle between the submission and completion of the read.
So there was:
submit_bio(the read) elv_next_request(the read) ... submit_bio(a write) elv_next_request(that write) bio_endio(that write) ... bio_endio(the read)
For many writes. I'm fairly (but not 100%) sure that the same behaviour was seen with four tags. - 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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