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Date: Wed, 08 Aug 2012 19:58:56 +0200 From: Lutz Vieweg <lvml@....de> To: linux-kernel@...r.kernel.org Cc: linux-raid@...r.kernel.org Subject: Re: What happened to TRIM support for raid linear/0/1/10? On 08/08/2012 03:10 PM, Holger Kiehl wrote: > Personally, I would think that TRIM support MD would be a very good thing. That's one thing I am waiting for, too. We had to implement a somewhat clumsy user-space application which does the trick for us - but that is an ugly work-around, as it has to allocate most of the free space on a filesystem for at least a little while (to know what blocks it can discard). Without periodic discard runs, our SSD-equipped servers suffer a ~50% write performance penalty, so this feature is not just a cosmetic issue to us. Regards, Lutz Vieweg -- 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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