Messages in this thread |  | | Date | Thu, 28 Nov 2013 17:07:31 +0100 | From | Oleg Nesterov <> | Subject | Re: [PATCH]: exec: avoid propagating PF_NO_SETAFFINITY into userspace child |
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On 11/28, Oleg Nesterov wrote: > > On 11/28, Peter Zijlstra wrote: > > > > So there's three useful parts to having a single parent task: > > > > - its a task so you can change the entire task attribute set; current > > and future. > > You can't change, say, its fs->root. > > OK, OK, this is almost off-topic, I am just trying to say that > (perhaps) in the longer term we might want even more than just > a dedicated kernel thread. > > > - new children will automatically get the desired attributes. > > yes, > > > - all children are easily identified by virtual of being children of > > said parent process. > > Well, UMH_WAIT_PROC won't work in this case, or it will be "single-threaded" > too. OK, this is probably solvable, but nontrivial. In this case "khelper" > should act as a /sbin/init for user-mode helpers.
But I'm afraid I got lost...
I interpreted "having a single parent task" as "parent of all usermode helpers".
If you actually meant that every wq thread should have a parent which represents the workqueue, well, I disagree but I leave this to you and Tejun again ;)
Oleg.
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