Messages in this thread | | | From | Richard Weinberger <> | Date | Thu, 15 Feb 2018 10:14:27 +0100 | Subject | Re: fs_struct refcounting: spinlock vs atomic |
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On Wed, Feb 14, 2018 at 10:13 PM, Enrico Weigelt <lkml@metux.net> wrote: > Hi folks, > > > in fork.c, a spinlock is held for fs_struct refcounting, while other > places - eg. switch_task_namespaces uses atomic_dec_and_test() on > the nsproxy. > > What's the exact difference here ? Could the atomic counting also used > for fs_struct ?
Well, the spinlock protects more than just the counter. So atomic won't do it.
-- Thanks, //richard
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