Messages in this thread | | | Date | Mon, 10 Feb 2003 02:47:19 -0200 (BRST) | From | Rik van Riel <> | Subject | Re: stochastic fair queueing in the elevator [Re: [BENCHMARK] 2.4.20-ck3 / aa / rmap with contest] |
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On Sun, 9 Feb 2003, Andrew Morton wrote: > David Lang <david.lang@digitalinsight.com> wrote: > > > > note that issuing a fsync should change all pending writes to 'syncronous' > > as should writes to any partition mounted with the sync option, or writes > > to a directory with the S flag set. > > We know, at I/O submission time, whether a write is to be waited upon. > That's in writeback_control.sync_mode.
An fsync might change already submitted asynchronous writes into synchronous writes, but this is not something I'm going to lose sleep over. ;)
> That, combined with an assumption that "all reads are synchronous" would > allow the outgoing BIOs to be appropriately tagged. > > It's still approximate.
Sounds like a good enough approximation to me.
Rik -- Bravely reimplemented by the knights who say "NIH". http://www.surriel.com/ http://guru.conectiva.com/ Current spamtrap: <a href=mailto:"october@surriel.com">october@surriel.com</a> - 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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