* 2.6.39.2: discard not supported on mpt2sas
@ 2011-07-14 21:54 Justin Piszcz
2011-07-15 7:42 ` Justin Piszcz
0 siblings, 1 reply; 2+ messages in thread
From: Justin Piszcz @ 2011-07-14 21:54 UTC (permalink / raw)
To: linux-kernel; +Cc: Alan Piszcz
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: 2.6.39.2: discard not supported on mpt2sas
2011-07-14 21:54 2.6.39.2: discard not supported on mpt2sas Justin Piszcz
@ 2011-07-15 7:42 ` Justin Piszcz
0 siblings, 0 replies; 2+ messages in thread
From: Justin Piszcz @ 2011-07-15 7:42 UTC (permalink / raw)
To: linux-kernel; +Cc: Alan Piszcz
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-07-14 21:54 2.6.39.2: discard not supported on mpt2sas Justin Piszcz
2011-07-15 7:42 ` Justin Piszcz
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