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On Wed, Oct 12, 2005 at 12:07:31PM +0200, Pavel Machek wrote: > On St 12-10-05 10:56:46, Felix Oxley wrote: > > > See Jamie Lokier's description how to *never* slow down. > > Sorry, where is this? > > Somewhere on the lkml, *long* ago. Basically idea is to have one > thread doing writing to disk, and second thread doing compression. If > no compressed pages are available, just write uncompressed ones. That > way compression can only speed things up. That's Message-ID: <20040327144945.GG21884@mail.shareable.org>, dated 2004-03-27 14:49:45. (Oh look, sendmail encodes the date in the Message-ID in exactly that format.) This technique only works for DMA-capable IO -- PIO will make it suck -- but attempting to dump 32GB via PIO would be insane anyways, so... -andy - 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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