From: Lutz Vieweg <lvml@5t9.de>
To: linux-kernel@vger.kernel.org
Cc: linux-raid@vger.kernel.org
Subject: Re: What happened to TRIM support for raid linear/0/1/10?
Date: Wed, 08 Aug 2012 19:58:56 +0200 [thread overview]
Message-ID: <jvu9cv$epn$1@dough.gmane.org> (raw)
In-Reply-To: <alpine.LRH.2.02.1208081308380.30954@praktifix.dwd.de>
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
next prev parent reply other threads:[~2012-08-08 17:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-08 13:10 What happened to TRIM support for raid linear/0/1/10? Holger Kiehl
2012-08-08 17:58 ` Lutz Vieweg [this message]
2012-08-09 3:24 ` NeilBrown
2012-08-09 5:14 ` Shaohua Li
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