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SubjectRe: Slow pthread_create() under high load
Stephen C. Tweedie wrote:

> Maybe, but although a lot of the POSIX threads are reasonable, things
> like requiring uid/gid updates to be instantly effective across all
> threads in the process are just insane. There ain't no way that's
> going into the kernel any time soon: it would require adding
semaphore
> locking to all of the credential information that is currently task-
> local.

Isn't this more the case of a missing "CLONE_CREDENTIALS" flag?
If POSIX specifies that credential are shared among threads
(similiar to VM, files,...) and Linux does not do this, than
it's not the specification that is broken but Linux' implementation
of the same...

Regards
Joerg

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