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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