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From: Tejun Heo <tj@kernel.org>
To: Aleksa Sarai <cyphar@cyphar.com>
Cc: lizefan@huawei.com, mingo@redhat.com, peterz@infradead.org,
	richard@nod.at, "Frédéric Weisbecker" <fweisbec@gmail.com>,
	linux-kernel@vger.kernel.org, cgroups@vger.kernel.org
Subject: Re: [PATCH v8 3/4] cgroups: allow a cgroup subsystem to reject a fork
Date: Tue, 7 Apr 2015 10:00:26 -0400	[thread overview]
Message-ID: <20150407140026.GK10582@htj.duckdns.org> (raw)
In-Reply-To: <CAOviyagYWk1VJW3upKsOS8rOiBQFTn752eJA_C2SkHnCh7EUrw@mail.gmail.com>

On Tue, Apr 07, 2015 at 11:47:02PM +1000, Aleksa Sarai wrote:
> > [...] I don't
> > think it's a good idea to send the patches as-are because we can't
> > debug and fix them properly, right? [...]
> 
> In what way are they hard to debug?

Some failures can happen before console init and figuring out what's
going on can be tricky.

...
> difference between having an array of CGROUP_SUBSYS_COUNT pointers or
> CGROUP_PREFORK_COUNT is the few bytes of memory you've "saved" (at the expense
> of making the callback code essentially unreadable).

Hmmm?  Just define a marker macro so that the index can be extracted
and loop over the indices and call the callbacks?  Why would this be
any more complex than anything else?

-- 
tejun

  reply	other threads:[~2015-04-07 14:00 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-01  8:57 [PATCH v8 0/4] cgroups: add pids subsystem Aleksa Sarai
2015-04-01  8:57 ` [PATCH v8 1/4] cgroups: use bitmask to filter for_each_subsys Aleksa Sarai
2015-04-01  8:57 ` [PATCH v8 2/4] cgroups: replace explicit ss_mask checking with for_each_subsys_which Aleksa Sarai
2015-04-01  8:57 ` [PATCH v8 3/4] cgroups: allow a cgroup subsystem to reject a fork Aleksa Sarai
2015-04-01 16:02   ` Tejun Heo
2015-04-02 23:42     ` Aleksa Sarai
2015-04-06 15:05       ` Tejun Heo
2015-04-07 13:47         ` Aleksa Sarai
2015-04-07 14:00           ` Tejun Heo [this message]
2015-04-01  8:57 ` [PATCH v8 4/4] cgroups: implement the PIDs subsystem Aleksa Sarai

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