Date: Thu, 18 Feb 2010 21:03:33 -0800 From: Tim Kientzle <kientzle@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: "tar tfv /dev/cd0" speedup patch Message-ID: <4B7E1BA5.7050209@freebsd.org> In-Reply-To: <20100218191347.GA4040@britannica.bec.de> References: <20100217215940.GA19713@triton8.kn-bremen.de> <4B7CE066.4030403@freebsd.org> <20100218183459.GA65508@triton8.kn-bremen.de> <20100218191347.GA4040@britannica.bec.de>
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Joerg Sonnenberger wrote: > On Thu, Feb 18, 2010 at 07:34:59PM +0100, Juergen Lock wrote: >> Ok here is a new version of the patch with these things fixed and the >> Linux case added: (Linux case not tested yet, and yes I did this on >> stable/8.) > > Why the check at all? Shouldn't devices that don't allow seek fail that? > E.g. for devices, just try to seek ahead and fallback to normal reading? That was the initial implementation in libarchive, but I had a number of reports of that not working for tape drives. I recently dug out and connected an old DDS drive I had in the closet, so I should probably try again and see if I misunderstood something along the way. Tim
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