From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phillip Susi Subject: Re: SSD - TRIM command Date: Mon, 21 Feb 2011 15:45:24 -0500 Message-ID: <4D62CEE4.2080207@cfl.rr.com> References: <4D517F4F.4060003@gmail.com> <4D5245DF.4020401@hardwarefreak.com> <4D62ACFE.4020401@cfl.rr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: =?UTF-8?B?TWF0aGlhcyBCdXLDqW4=?= Cc: Roberto Spadim , David Brown , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 2/21/2011 2:39 PM, Mathias Bur=C3=A9n wrote: > Plus support is needed from the kernel (done) filesystem (ext4 has > it). The filesystem seese the MD device, not the actual SSDs behind > it, so it would probably be quite complicated to implement passthroug= h > of the trim command in this case. It has been mentioned at least twice now how to implement it. The device-mapper driver already has implemented TRIM passthrough for its linear, stripe, and mirror targets. The trick is handling it with raid= [56]. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html