linux-kernel - Re: [RFC PATCH 14/30] mm: prevent slabobj_ext allocations for slabobj_ext and kmem

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Message-ID: <CAJuCfpGRL72qghDf9bNsp_K0kabvLBs5ags2hHXn-5_Ar8RX5A@mail.gmail.com>
Date:   Thu, 1 Sep 2022 17:24:40 -0700
From:   Suren Baghdasaryan <surenb@...gle.com>
To:     Roman Gushchin <roman.gushchin@...ux.dev>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Kent Overstreet <kent.overstreet@...ux.dev>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Johannes Weiner <hannes@...xchg.org>,
        Mel Gorman <mgorman@...e.de>,
        Davidlohr Bueso <dave@...olabs.net>,
        Matthew Wilcox <willy@...radead.org>,
        "Liam R. Howlett" <liam.howlett@...cle.com>,
        David Vernet <void@...ifault.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Peter Xu <peterx@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        Jens Axboe <axboe@...nel.dk>, mcgrof@...nel.org,
        masahiroy@...nel.org, nathan@...nel.org, changbin.du@...el.com,
        ytcoode@...il.com, Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Benjamin Segall <bsegall@...gle.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        Christopher Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>, 42.hyeyoo@...il.com,
        Alexander Potapenko <glider@...gle.com>,
        Marco Elver <elver@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Muchun Song <songmuchun@...edance.com>, arnd@...db.de,
        jbaron@...mai.com, David Rientjes <rientjes@...gle.com>,
        Minchan Kim <minchan@...gle.com>,
        Kalesh Singh <kaleshsingh@...gle.com>,
        kernel-team <kernel-team@...roid.com>,
        linux-mm <linux-mm@...ck.org>, iommu@...ts.linux.dev,
        kasan-dev@...glegroups.com, io-uring@...r.kernel.org,
        linux-arch@...r.kernel.org, xen-devel@...ts.xenproject.org,
        linux-bcache@...r.kernel.org, linux-modules@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 14/30] mm: prevent slabobj_ext allocations for
 slabobj_ext and kmem_cache objects

On Thu, Sep 1, 2022 at 4:41 PM Roman Gushchin <roman.gushchin@...ux.dev> wrote:
>
> On Tue, Aug 30, 2022 at 02:49:03PM -0700, Suren Baghdasaryan wrote:
> > Use __GFP_NO_OBJ_EXT to prevent recursions when allocating slabobj_ext
> > objects. Also prevent slabobj_ext allocations for kmem_cache objects.
> >
> > Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
>
> Patches 12-14 look good to me.
> It's probably to early to ack anything, but otherwise I'd ack them.

Thank you for reviewing!

>
> Thanks!