From: Michal Hocko <mhocko@suse.com>
To: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Vlastimil Babka <vbabka@suse.cz>,
Eric Dumazet <edumazet@google.com>,
Waiman Long <longman@redhat.com>,
Suren Baghdasaryan <surenb@google.com>,
Alexander Potapenko <glider@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
kasan-dev@googlegroups.com
Subject: Re: [PATCH 1/3] lib/stackdepot: Add a refcount field in stack_record
Date: Thu, 1 Sep 2022 10:38:08 +0200 [thread overview]
Message-ID: <YxBvcDFSsLqn3i87@dhcp22.suse.cz> (raw)
In-Reply-To: <YxBsWu36eqUw03Dy@elver.google.com>
On Thu 01-09-22 10:24:58, Marco Elver wrote:
> On Thu, Sep 01, 2022 at 06:42AM +0200, Oscar Salvador wrote:
[...]
> > diff --git a/lib/stackdepot.c b/lib/stackdepot.c
> > index 5ca0d086ef4a..aeb59d3557e2 100644
> > --- a/lib/stackdepot.c
> > +++ b/lib/stackdepot.c
> > @@ -63,6 +63,7 @@ struct stack_record {
> > u32 hash; /* Hash in the hastable */
> > u32 size; /* Number of frames in the stack */
> > union handle_parts handle;
> > + refcount_t count; /* Number of the same repeated stacks */
>
> This will increase stack_record size for every user, even if they don't
> care about the count.
Couldn't this be used for garbage collection?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2022-09-01 8:38 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 4:42 [PATCH 0/3] page_owner: print stacks and their counter Oscar Salvador
2022-09-01 4:42 ` [PATCH 1/3] lib/stackdepot: Add a refcount field in stack_record Oscar Salvador
2022-09-01 8:24 ` Marco Elver
2022-09-01 8:38 ` Michal Hocko [this message]
2022-09-01 9:18 ` Marco Elver
2022-09-01 10:01 ` Michal Hocko
2022-09-01 10:20 ` Marco Elver
2022-09-05 20:53 ` Andrey Konovalov
2022-09-02 3:27 ` Oscar Salvador
2022-09-01 4:42 ` [PATCH 2/3] mm, page_owner: Add page_owner_stacks file to print out only stacks and their counter Oscar Salvador
2022-09-01 8:16 ` Ammar Faizi
2022-09-02 3:33 ` Oscar Salvador
2022-09-01 19:29 ` kernel test robot
2022-09-02 0:56 ` kernel test robot
2022-09-01 4:42 ` [PATCH 3/3] mm,page_owner: Filter out stacks by a threshold counter Oscar Salvador
2022-09-01 8:31 ` Ammar Faizi
2022-09-02 3:36 ` Oscar Salvador
2022-09-01 8:40 ` Michal Hocko
2022-09-02 3:37 ` Oscar Salvador
2022-09-01 8:32 ` [PATCH 0/3] page_owner: print stacks and their counter Michal Hocko
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