Date: Tue, 02 Dec 2014 23:19:45 -0800 From: Alfred Perlstein <alfred@freebsd.org> To: freebsd-arch@freebsd.org Subject: Re: enable TRIM by default ? Message-ID: <547EB991.8000303@freebsd.org> In-Reply-To: <20141203071447.GC13944@server.rulingia.com> References: <89094.1417506193@critter.freebsd.dk> <20141203071447.GC13944@server.rulingia.com>
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On 12/2/14 11:14 PM, Peter Jeremy wrote: > On 2014-Dec-02 07:43:13 +0000, Poul-Henning Kamp <phk@phk.freebsd.dk> wrote: >> Isn't it time that we enable TRIM by default in newfs ? > As an alternative viewpoint, I have a SSD that got severe indigestion when > I tried to enable TRIM: > aspire kernel: ad0: TIMEOUT - CFA ERASE retrying (1 retry left) > aspire kernel: ad0: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly > aspire kernel: ata1: error issuing SETFEATURES ENABLE WCACHE command > aspire kernel: ata1: error issuing SET_MULTI command > aspire kernel: ata1: error issuing WRITE_DMA command > The kernel then went to 1 core of interrupt and wedged. > > I admit that it's about 3 years old but smartctl says it's still got lots of > life left in it and googling suggests they are still available. > > The problem is that if a SSD doesn't support TRIM, it is likely to have all > sorts of misbehaviour if you attempt to enable TRIM. If TRIM is enabled by > default, you need to provide a simple way to disable it if the system can't > cope. > Is there a hints/quirks system we can use? So: default to on, quirks/hints sets to off? -Alfred
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