linux-kernel - Re: [PATCH 1/2] fs: Do not dispatch FITRIM through separate super

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Date:	Fri, 19 Nov 2010 09:53:52 -0500
From:	Mark Lord <kernel@...savvy.com>
To:	Chris Mason <chris.mason@...cle.com>
CC:	James Bottomley <james.bottomley@...e.de>,
	Christoph Hellwig <hch@...radead.org>,
	Matthew Wilcox <matthew@....cx>,
	Josef Bacik <josef@...hat.com>,
	Lukas Czerner <lczerner@...hat.com>, tytso <tytso@....edu>,
	linux-ext4 <linux-ext4@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	sandeen <sandeen@...hat.com>
Subject: Re: [PATCH 1/2] fs: Do not dispatch FITRIM through separate super_operation

On 10-11-19 09:40 AM, Chris Mason wrote:
>
> We've been told that online and constant trimming is the default in
> windows7.   The ssds are most likely to just start ignoring the trims
> they can't service efficiently.

Win7 collects multiple TRIM ranges over time and batches them as single TRIMs
(as reported to me by an SSD vendor who traced it with a SATA analyzer,
  and who also apparently has "inside info").

That's what we also need Linux to do.

Cheers
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