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Code Wiki

Thomas Schmitt 2020-08-13 14:16:38 +00:00
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8
ConcurrentLinuxSr.md

@ -1,7 +1,7 @@
# The problems with concurrent burns on Linux # The problems with concurrent burns on Linux
Beginning with high version numbers of Linux kernel 2.6 and up to Beginning with high version numbers of Linux kernel 2.6 and up to
at least kernel 4.3.0 there is a performance problem when more than probably kernel 5.6 or 5.7 there is a performance problem when more than
one optical drive is used for burning or reading via libburn at the same time. one optical drive is used for burning or reading via libburn at the same time.
The overall throughput is less than the throughput of the slowest drive The overall throughput is less than the throughput of the slowest drive
when it is used as only one. when it is used as only one.
@ -31,6 +31,12 @@ and the summary of consequences with remedy proposal:
Obviously the deprecated device file family `/dev/sg*` does not have such Obviously the deprecated device file family `/dev/sg*` does not have such
a lock. a lock.
Relief can be expected by a commit of Feb 24, 2020:
https://github.com/torvalds/linux/commit/51a858817dcdbbdee22cb54b0b2b26eb145ca5b6
At that time, the kernel version was in the 5.6-rc era.
# Consequences for libburn # Consequences for libburn
## Using /dev/sg* against all good advise ## Using /dev/sg* against all good advise