linux-kernel - [GIT PULL] percpu fixes for-4.19-rc8

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Message-ID: <20181009222815.GA56709@dennisz-mbp.dhcp.thefacebook.com>
Date:   Tue, 9 Oct 2018 15:28:15 -0700
From:   Dennis Zhou <dennis@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Tejun Heo <tj@...nel.org>, Christoph Lameter <cl@...ux.com>,
        linux-kernel@...r.kernel.org
Subject: [GIT PULL] percpu fixes for-4.19-rc8

Hi Greg,

The new percpu allocator introduced in 4.14 had a missing free for the
percpu metadata. This caused a memory leak when percpu memory is being
churned resulting in the allocation and deallocation of percpu memory
chunks.

Thanks,
Dennis

The following changes since commit 0238df646e6224016a45505d2c111a24669ebe21:

  Linux 4.19-rc7 (2018-10-07 17:26:02 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git for-4.19-fixes

for you to fetch changes up to 6685b357363bfe295e3ae73665014db4aed62c58:

  percpu: stop leaking bitmap metadata blocks (2018-10-07 14:50:12 -0700)

----------------------------------------------------------------
Mike Rapoport (1):
      percpu: stop leaking bitmap metadata blocks

 mm/percpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/percpu.c b/mm/percpu.c
index a749d4d96e3e..4b90682623e9 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1212,6 +1212,7 @@ static void pcpu_free_chunk(struct pcpu_chunk *chunk)
 {
 	if (!chunk)
 		return;
+	pcpu_mem_free(chunk->md_blocks);
 	pcpu_mem_free(chunk->bound_map);
 	pcpu_mem_free(chunk->alloc_map);
 	pcpu_mem_free(chunk);