Mailinglist Archive: packet-writing (84 mails)

[Carlo <magnifex@xxxxxxxxxxx>]

> What cache are you talking about here? The config option
> "CONFIG_CDROM_PKTCDVD_BUFFERS" (Free buffers for data gathering) is not
> used in the 2.4 version of the packet writing patch.

I use all three option in the block devices.
+
+Packet writing on CD/DVD media (EXPERIMENTAL)
+CONFIG_CDROM_PKTCDVD
+  If you have a CDROM drive that supports packet writing, say Y to
+  include preliminary support. It should work with any MMC/Mt Fuji
+  complain ATAPI or SCSI drive, which is just about any newer CD
+  writer.
+
+  Currently only writing to CD-RW discs is possible.
+
+  If you want to compile the driver as a module ( = code which can be
+  inserted in and removed from the running kernel whenever you want),
+  say M here and read Documentation/modules.txt. The module will be
+  called pktcdvd.o
+
+Free buffers
+CONFIG_CDROM_PKTCDVD_BUFFERS
+  This controls the amount of free buffers that are allocated for
+  data gathering. More buffers allow us to service more than one request
+  that requires full data gathering at the time, which could increase
+  performance in those cases.
+
+Write caching
+CONFIG_CDROM_PKTCDVD_WCACHE
+  If enabled, write caching will be set for the CD-R/W device. For now
+  this option is dangerous unless the CD-RW media is known good, as we
+  don't do deferred write error handling yet.
+
taken from your patch for 2.4.18-pre7
And i have enabled all three
CONFIG_CDROM_PKTCDVD_BUFFERS set to 4096
If i increase this value i can have a better write speed for large number of 
little files?
This buffer where is allocated?
In memory or in harddrive?
Sorry
 I'm not a programmer.


Carlo.