audio cd writing causes massive swap and crash
From: Ed Sweetman
Date: Sat Jul 17 2004 - 15:01:42 EST
Both with 2.6.7-rc3 and 2.6.8-rc1-mm1 I get the same behavior when
writing an audio cd on my plextor px-712a. DMA is enabled and normal
data cds write as expected, but audio cds will cause (at any speed) the
box to start using insane amounts of swap (>150MB) and eventually cause
the box to crash before finishing the cd. CPU usage during the write is
very low, but the feeling of lagginess begins after the first few tracks
(and as the memory begins to be sucked away). I've used both cdrecord
from cdrtools in debian and from the site and both have the same
behavior. I dont know how i'd go about finding out what the problem is,
so far I've coastered over 10 cds trying different ways of burning an
audio cd but it appears that burnfree, speed have nothing to do with the
Here's some drive info if it helps.
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
Device type : Removable CD-ROM
Version : 0
Response Format: 1
Vendor_info : 'PLEXTOR '
Identifikation : 'DVDR PX-712A '
Revision : '1.01'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
cdrecord: This version of cdrecord does not include DVD-R/DVD-RW support
cdrecord: See /usr/share/doc/cdrecord/README.DVD.Debian for details on
Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr).
Driver flags : MMC-3 SWABAUDIO BURNFREE VARIREC FORCESPEED SPEEDREAD
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
now in cdrecord i use the option -swab not sure if that counters the
driver flags or what, either way I doubt it would be causing this problem.
the drive by the way is mmc4 compliant, so it's weird that it says mmc2.
any more info that's needed just tell me.
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