linux-kernel - Re: [PATCH 5/5] libata: Add support for TRIM

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Message-ID: <49E79445.3080806@rtr.ca>
Date:	Thu, 16 Apr 2009 16:25:41 -0400
From:	Mark Lord <liml@....ca>
To:	Matthew Wilcox <willy@...ux.intel.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	jgarzik@...hat.com
Subject: Re: [PATCH 5/5] libata: Add support for TRIM

Matthew Wilcox wrote:
> Signed-off-by: Matthew Wilcox <willy@...ux.intel.com>
> ---
>  drivers/ata/libata-scsi.c |   46 +++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 46 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
> index b9747fa..d4c8b8b 100644
> --- a/drivers/ata/libata-scsi.c
> +++ b/drivers/ata/libata-scsi.c
...

It works.  :)

I'm using TRIM on a 120GB OCZ Vertex SSD here now,
and instrumented ata_discard_fn() to log what it does.
Seems to work perfectly, and the sector ranges for TRIM
match those given by "hdparm --fibmap" for the files I've tried.

Does this also TRIM metadata (eg. block bitmaps and the like) ?

Thanks Matthew (and others).
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