Date: Wed, 9 Sep 2015 12:41:08 +0200 From: Jan Bramkamp <crest@rlwinm.de> To: freebsd-fs@freebsd.org Subject: Re: TRIM support (same bug as linux?) Message-ID: <55F00CC4.7060600@rlwinm.de> In-Reply-To: <CAD=tpedAx2XLtQe6Nn%2BHvXWZ0X=TekmkpTruxCndYqpBXPFaFA@mail.gmail.com> References: <CAD=tpedAx2XLtQe6Nn%2BHvXWZ0X=TekmkpTruxCndYqpBXPFaFA@mail.gmail.com>
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On 09/09/15 01:15, FF wrote: > I'm asking a pretty vague question and I apologize in advance, not trying > to troll. > > The question has to do with whether FreeBSD is using TRIM the same way as > recent Linux kernels. > > https://blog.algolia.com/when-solid-state-drives-are-not-that-solid/ seems > to imply that there are instabilities that can occur. Trying to avoid > duplicating effort if this has already been addressed or if its a complete > dead alley because there isn't a commonality. At first the leading theory was that Linux triggered a firmware bug in the SSDs or that a bug in the handling of queued TRIM operations is responsible. The real culprit was a bug in the code for linear mdraid volumes causing the wrong blocks to be unmapped with TRIM.
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