From: Minchan Kim <minchan@kernel.org>
To: Dmitry Osipenko <digetx@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
joaodias@google.com, willy@infradead.org, david@redhat.com,
surenb@google.com, John Hubbard <jhubbard@nvidia.com>,
Nicolas Chauvet <kwizart@gmail.com>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>
Subject: Re: [PATCH v4] mm: cma: support sysfs
Date: Fri, 19 Mar 2021 12:03:46 -0700 [thread overview]
Message-ID: <YFT1klxSFMlIXLHb@google.com> (raw)
In-Reply-To: <007c0317-8819-a6b8-fdff-c0b5899c4f51@gmail.com>
On Fri, Mar 19, 2021 at 09:48:11PM +0300, Dmitry Osipenko wrote:
> 19.03.2021 21:21, Minchan Kim пишет:
> > On Fri, Mar 19, 2021 at 08:56:06PM +0300, Dmitry Osipenko wrote:
> >> 19.03.2021 19:30, Minchan Kim пишет:
> >>> +static void cma_kobj_release(struct kobject *kobj)
> >>> +{
> >>> + struct cma_kobject *cma_kobj = container_of(kobj, struct cma_kobject, kobj);
> >>> +
> >>> + kfree(cma_kobj);
> >>> +}
> >>
> >> Oh, wait.. I think this kfree wrong since cma_kobj belongs to the array.
> >
> > Oh, good spot. Let me use kzalloc.
> >
>
> Thinking a bit more about this.. it looks like actually it should be
> better to get back to the older variant of cma_stat, but allocate at the
> time of CMA initialization, rather than at the time of sysfs
> initialization. Then the cma_stat will be decoupled from the cma struct
IIRC, the problem was slab was not initiaized at CMA init point.
That's why I liked your suggestion.
> and cma_stat will be a self-contained object.
Yeah, self-contained is better but it's already weird to
have differnt lifetime for one object since CMA object
never die, technically.
next prev parent reply other threads:[~2021-03-19 19:04 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-09 6:23 [PATCH v4] mm: cma: support sysfs Minchan Kim
2021-03-19 12:44 ` Dmitry Osipenko
2021-03-19 13:39 ` Dmitry Osipenko
2021-03-19 13:42 ` Greg Kroah-Hartman
2021-03-19 13:45 ` Dmitry Osipenko
2021-03-19 13:47 ` Greg Kroah-Hartman
2021-03-19 13:51 ` Dmitry Osipenko
2021-03-19 14:19 ` Dmitry Osipenko
2021-03-19 14:27 ` Greg Kroah-Hartman
2021-03-19 15:38 ` Dmitry Osipenko
2021-03-19 15:50 ` Greg Kroah-Hartman
2021-03-19 16:24 ` Dmitry Osipenko
2021-03-19 16:30 ` Minchan Kim
2021-03-19 17:29 ` Dmitry Osipenko
2021-03-19 17:41 ` Dmitry Osipenko
2021-03-19 17:44 ` Dmitry Osipenko
2021-03-19 18:07 ` Matthew Wilcox
2021-03-19 18:18 ` Minchan Kim
2021-03-19 18:59 ` Dmitry Osipenko
2021-03-19 19:00 ` Dmitry Osipenko
2021-03-19 17:56 ` Dmitry Osipenko
2021-03-19 18:21 ` Minchan Kim
2021-03-19 18:48 ` Dmitry Osipenko
2021-03-19 19:03 ` Minchan Kim [this message]
2021-03-19 19:24 ` Dmitry Osipenko
2021-03-20 7:52 ` Greg Kroah-Hartman
2021-03-22 14:44 ` Dmitry Osipenko
2021-03-19 13:45 ` Dmitry Osipenko
-- strict thread matches above, loose matches on Subject: below --
2021-03-04 16:17 Minchan Kim
2021-03-05 17:34 ` David Hildenbrand
2021-03-05 20:34 ` Minchan Kim
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