From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: linux-kernel@vger.kernel.org
Cc: Alan Piszcz <ap@solarrain.com>
Subject: Re: 2.6.39.2: discard not supported on mpt2sas
Date: Fri, 15 Jul 2011 03:42:01 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.2.02.1107150341350.17582@p34.internal.lan> (raw)
In-Reply-To: <alpine.DEB.2.02.1107141752580.4904@p34.internal.lan>
On Thu, 14 Jul 2011, Justin Piszcz wrote:
> Hi,
>
> Something interesting to note:
>
> When I have an Intel 510 SSD plugged into an mpt2sas board, discard (TRIM) is
> not supported:
>
> [ 16.483409] EXT4-fs (sda2): re-mounted. Opts: discard
> [ 17.814743] EXT4-fs warning (device sda2): release_blocks_on_commit:2679:
> discard not supported, disabling
>
> With a regular SATA port or an (PCI-e 2.0 x1 card), it works but with the
> overhead, PCI-e x1 seems to peak around 400-430MiB/s for reads, whereas with
> an X8 SAS controller I see 480-495MiB/s as the benchmarks show on various
> websites, ah well, its one thing or the other.
>
> Justin.
>
Hi,
Is there anyway to allow pass through for TRIM via mp2sas or is it
strictly for SATA controllers only?
Justin.
prev parent reply other threads:[~2011-07-15 7:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-14 21:54 Justin Piszcz
2011-07-15 7:42 ` Justin Piszcz [this message]
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