Date: Fri, 16 Oct 2015 10:12:12 +0200 From: Hans Petter Selasky <hp@selasky.org> To: Bruce Evans <brde@optusnet.com.au>, Warner Losh <imp@freebsd.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r289405 - head/sys/ufs/ffs Message-ID: <5620B15C.8090104@selasky.org> In-Reply-To: <20151016151349.W1280@besplex.bde.org> References: <201510160306.t9G3622O049128@repo.freebsd.org> <20151016151349.W1280@besplex.bde.org>
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On 10/16/15 08:21, Bruce Evans wrote: > In addition, making the file contiguous in LBA space doesn't > improve the access times from flash devices because they have no seek > time. Hi, This is not exactly true, like Bruce pointed out too. Maybe there should be a check, that if the block is too small reallocate it, else leave it for the sake of the flash. Doing 1K accesses versus 64K accesses will typically show up in the performance benchmark regardless of how fast the underlying medium is. --HPS
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