Messages in this thread | | | Date | Sun, 27 Jan 2002 10:11:31 +0100 | From | Kristian <> | Subject | Re: [CFT] Bus mastering support for IDE CDROM audio |
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Andrew Morton <akpm@zip.com.au> wrote: > There's an updated patch at > > http://www.zip.com.au/~akpm/linux/2.4/2.4.18-pre7/ide-akpm.patch > > It now supports multi-frame transfers and should fix the problem > which you observed.
Your first patch behaves much better as the second. It seems that my drives are running with PIO only again. I see no problems with your first patch.
cdparanoia with ide-akpm-1:
/dev/scd0: (CPU ~40%) real 1m10.194s user 0m6.560s sys 0m2.880s /dev/scd1: (CPU ~40%) real 2m8.283s user 0m7.230s sys 0m3.890s
cdparanoia with ide-akpm-2:
/dev/scd0: (CPU ~80%) real 1m37.472s user 0m7.340s sys 0m3.290s /dev/scd1: (CPU ~50%) real 2m40.879s user 0m7.650s sys 0m3.620s
dd if=/dev/scd0 of=test.iso:
And dd consumes about 5% CPU with your first patch and almost 90% with your second patch as I would disable dma on it (and the system gets really slow responding).
My specs:
hdc: LTN526S, ATAPI CD/DVD-ROM drive hdd: Hewlett-Packard CD-Writer Plus 9100b, ATAPI CD/DVD-ROM drive
I'm using ide-scsi: scsi0 : SCSI host adapter emulation for IDE ATAPI devices Vendor: LITEON Model: CD-ROM LTN526S Rev: YS0A Type: CD-ROM ANSI SCSI revision: 02 Vendor: HP Model: CD-Writer+ 9100b Rev: 1.06 Type: CD-ROM ANSI SCSI revision: 02
I'm using 2.4.18-pre3-ac2. Maybe there're some collisions with Andre's IDE patches ?
*Kristian
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