On Wed, 20 Dec 2017, gregkh@xxxxxxxxxxxxxxxxxxx wrote: > This is a note to let you know that I've just added the patch titled > > percpu: don't forget to free the temporary struct pcpu_alloc_info > to the 4.14-stable tree which can be found at: > http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary > > The filename of the patch is: > percpu-don-t-forget-to-free-the-temporary-struct-pcpu_alloc_info.patch > and it can be found in the queue-4.14 subdirectory. > > If you, or anyone else, feels it should not be added to the stable tree, > please let <stable@xxxxxxxxxxxxxxx> know about it. If you consider this patch worthy enough for the stable tree, then you should also pick commit abee210500ed otherwise the CRIS architecture will regress. > From foo@baz Wed Dec 20 18:17:52 CET 2017 > From: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx> > Date: Tue, 3 Oct 2017 18:29:49 -0400 > Subject: percpu: don't forget to free the temporary struct pcpu_alloc_info > > From: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx> > > > [ Upstream commit 438a50618095061920d3a30d4c5ca1ef2e0ff860 ] > > Unlike the SMP case, the !SMP case does not free the memory for struct > pcpu_alloc_info allocated in setup_per_cpu_areas(). And to give it a > chance of being reused by the page allocator later, align it to a page > boundary just like its size. > > Signed-off-by: Nicolas Pitre <nico@xxxxxxxxxx> > Acked-by: Dennis Zhou <dennisszhou@xxxxxxxxx> > Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> > Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > --- > mm/percpu.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > --- a/mm/percpu.c > +++ b/mm/percpu.c > @@ -1856,7 +1856,7 @@ struct pcpu_alloc_info * __init pcpu_all > __alignof__(ai->groups[0].cpu_map[0])); > ai_size = base_size + nr_units * sizeof(ai->groups[0].cpu_map[0]); > > - ptr = memblock_virt_alloc_nopanic(PFN_ALIGN(ai_size), 0); > + ptr = memblock_virt_alloc_nopanic(PFN_ALIGN(ai_size), PAGE_SIZE); > if (!ptr) > return NULL; > ai = ptr; > @@ -2719,6 +2719,7 @@ void __init setup_per_cpu_areas(void) > > if (pcpu_setup_first_chunk(ai, fc) < 0) > panic("Failed to initialize percpu areas."); > + pcpu_free_alloc_info(ai); > } > > #endif /* CONFIG_SMP */ > > > Patches currently in stable-queue which might be from nicolas.pitre@xxxxxxxxxx are > > queue-4.14/percpu-don-t-forget-to-free-the-temporary-struct-pcpu_alloc_info.patch >