Messages in this thread | | | From | Guillaume Chazarain <> | Date | Sun, 09 Nov 2003 11:57:39 +0100 | Subject | Re: [PATCH] cfq + io priorities |
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> A process has an assigned io nice level, anywhere from 0 to 20. Both of
OK, I ask THE question : why not using the normal nice level, via current->static_prio ? This way, cdrecord would be RT even in IO, and nice -19 updatedb would have a minimal impact on the system.
> these end values are "special" - 0 means the process is only allowed to > do io if the disk is idle, and 20 means the process io is considered
So a process with ioprio == 0 can be forever starved. As it's not done this way for nice -19 tasks (unlike FreeBSD), wouldn't it be safer to give a very long deadline to ioprio == 0 requests ?
Thanks for making something I have been dreaming of for a long time :)
Guillaume
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