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Nov
9
comment How preemption works on Linux when a program has a timer less then 4ms?
That's simply not true. You can sleep for less than a jiffy. See my edit.
Nov
9
comment How preemption works on Linux when a program has a timer less then 4ms?
... and trigger an immediate wakeup for your process. What's your point? Sure, if you have a higher priority process also running then the scheduler might decide that the other process gets to run instead of you, but that's always a problem on a multitasking operating system, and can be solved with appropriate application of SCHED_RR, SCHED_FIFO, priorities, etc.
Nov
9
comment Preserve scroll on Linux console switch
Well, there you go, apply that patch and you're all set :)
Nov
9
comment Preserve scroll on Linux console switch
The kernel could do that, yes, but it doesn't, nor does it provide any way for you to get at that data from outside the kernel. You could change the kernel, of course.
Nov
9
answered Configure kbd and immediately profit of the changes without rebooting
Nov
9
answered How preemption works on Linux when a program has a timer less then 4ms?
Nov
9
answered How to attach to remote machine's local display session over ssh?
Nov
9
comment Peculiar issue with mutt & my_hdr From:
Yeah, exactly. From the point of view of most spam filters, as long as Sender shows the actual sender for tracing purposes, it's OK to put whatever you want in the user-visible From field.
Nov
9
answered Starting Udev hangs at boot
Nov
9
answered Peculiar issue with mutt & my_hdr From:
Nov
9
answered Preserve scroll on Linux console switch
Nov
8
comment How to see the commands executed in another shell?
It's open source; you could always add that feature if you really need it. :) Or add a slightly more intelligent script parsing the strace output that ignores a PID once it execs.
Nov
8
answered How to see the commands executed in another shell?
Nov
8
answered kill -9 hangs, unable to kill process (murder proof process)
Nov
7
answered What happens to data copied after undoing fdisk?
Nov
7
answered Writing data on particular sectors or blocks
Nov
7
comment Is there any impact of reaping zombie processes?
that was 1 example, I'm sure there are many more. The point is that you don't need to fix the root cause because there's no problem.
Nov
6
answered CNAME: Mail address gets rewritten
Nov
6
comment “Virtual” shell, ie. jailing an user inside a process after the (SSH) login
Better would be to put just exec php script.php in your .bashrc. Then the bash process will be replaced entirely, rather than sitting around taking up resources while the php script runs.
Nov
6
comment Is there any impact of reaping zombie processes?
Here is a counterexample that took no time to find: monit starts a program at regular intervals but doesn't reap them until the following interval starts, perhaps five minutes later.