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Message-ID: <20171213145044.falrw5jsskq2ocha@linutronix.de> Date: Wed, 13 Dec 2017 15:50:44 +0100 From: Sebastian Andrzej Siewior <bigeasy@...utronix.de> To: Jesper Dangaard Brouer <brouer@...hat.com> Cc: linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org, tglx@...utronix.de, Peter Zijlstra <peterz@...radead.org>, Steven Rostedt <rostedt@...dmis.org>, Vladimir Davydov <vdavydov@...tuozzo.com>, linux-mm@...ck.org, Rao Shoaib <rao.shoaib@...cle.com>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Subject: Re: [PATCH RT] mm/slub: close possible memory-leak in kmem_cache_alloc_bulk() On 2017-12-13 15:46:54 [+0100], Jesper Dangaard Brouer wrote: > > Jesper: There are no users of kmem_cache_alloc_bulk() and kfree_bulk(). > > Only kmem_cache_free_bulk() is used since it was introduced. Do you > > think that it would make sense to remove those? > > I would like to keep them. > > Rao Shoaib (Cc'ed) is/was working on a patchset for RCU-bulk-free that > used the kfree_bulk() API. > > I plan to use kmem_cache_alloc_bulk() in the bpf-map "cpumap", for bulk > allocating SKBs during dequeue of XDP frames. (My original bulk alloc > SKBs use-case during NAPI/softirq was never merged). I see. So it may gain users in future you say. > I've not seen free_delayed() before... and my cscope cannot find it... It is PREEMPT RT only, mainline is not affected (that is why there is a RT next to the PATCH in subject). Sebastian
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