sched/completions/Documentation: Add recommendation for dynamic and ONSTACK completions

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To prevent dynamic completion objects from being de-allocated while still
in use, add a recommendation to embed them in long lived data structures.

Also add a note for the on-stack case that emphasizes the dangers of
the limited scope, and recommends dynamic allocation if scope limitations
are not clearly understood.

[ mingo: Minor touch-ups of the text, expanded it a bit to make the
         warnings Nicholas added more prominent. ]

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john.garry@huawei.com
Link: http://lkml.kernel.org/r/1539697539-24055-1-git-send-email-hofrat@osadl.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

...

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Nicholas Mc Guire 2018-10-16 15:45:39 +02:00 • committed by Ingo Molnar

parent 0c373344b5

commit 11e13696a0

1 changed files with 34 additions and 8 deletions

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Documentation/scheduler/completion.txt

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