Some clarifications about the Linux throughput problem
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#define Cdrskin_timestamP "2009.12.06.073404"
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#define Cdrskin_timestamP "2009.12.06.074622"
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@ -1285,6 +1285,12 @@ int burn_disc_close_track_dvd_plus_r(struct burn_write_opts *o,
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MAP_SHARED | MAP_ANONYMOUS, -1, (off_t) 0);
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is supposed to allocate a properly aligned buffer.
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64 KB is supposed to be a safe size.
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Actually mmap() seems to be the main cause for a positive effect
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of O_DIRECT.
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This simplified transmission function did not bring visible benefit.
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So for now it is not worth to teach it all applicable details of old
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CD sector oriented transmission.
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@return 1= ok, go on , 2= no input with track->open_ended = nothing written
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<= 0 = error
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