linux-ext4 - Re: [PATCH 1/2] fs: Do not dispatch FITRIM through separate super

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Message-ID: <20101119110903.GA10944@infradead.org>
Date:	Fri, 19 Nov 2010 06:09:03 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Mark Lord <kernel@...savvy.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@....edu,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, sandeen@...hat.com
Subject: Re: [PATCH 1/2] fs: Do not dispatch FITRIM through separate
 super_operation

On Thu, Nov 18, 2010 at 04:37:34PM -0500, Mark Lord wrote:
> Currently, I patch my kernels to remove the automatic online TRIMs.
> Is there a knob somewhere for this in the later kernels?

There is not automatic discard in any recent kernel.  You always need
to mount with -o discard to enabled it.

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