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linux-brain/include
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Liu Zixian 22b11dbbf9 mm/hugetlb: initialize hugetlb_usage in mm_init 
commit 13db8c50477d83ad3e3b9b0ae247e5cd833a7ae4 upstream.

After fork, the child process will get incorrect (2x) hugetlb_usage.  If
a process uses 5 2MB hugetlb pages in an anonymous mapping,

	HugetlbPages:	   10240 kB

and then forks, the child will show,

	HugetlbPages:	   20480 kB

The reason for double the amount is because hugetlb_usage will be copied
from the parent and then increased when we copy page tables from parent
to child.  Child will have 2x actual usage.

Fix this by adding hugetlb_count_init in mm_init.

Link: https://lkml.kernel.org/r/20210826071742.877-1-liuzixian4@huawei.com
Fixes: 5d317b2b65 ("mm: hugetlb: proc: add HugetlbPages field to /proc/PID/status")
Signed-off-by: Liu Zixian <liuzixian4@huawei.com>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-22 12:26:37 +02:00
..
acpi ACPI: fix NULL pointer dereference 2021-08-08 09:04:08 +02:00
asm-generic vmlinux.lds.h: Handle clang's module.{c,d}tor sections 2021-08-18 08:57:04 +02:00
clocksource
crypto crypto: public_key: fix overflow during implicit conversion 2021-09-22 12:26:21 +02:00
drm drm: Return -ENOTTY for non-drm ioctls 2021-07-28 13:31:01 +02:00
dt-bindings clk: imx8mn: Fix incorrect clock defines 2020-03-18 07:17:55 +01:00
keys certs: Add EFI_CERT_X509_GUID support for dbx entries 2021-06-30 08:47:55 -04:00
kvm
linux mm/hugetlb: initialize hugetlb_usage in mm_init 2021-09-22 12:26:37 +02:00
math-emu
media media: subdev: disallow ioctl for saa6588/davinci 2021-07-19 08:53:17 +02:00
misc
net psample: Add a fwd declaration for skbuff 2021-08-18 08:56:59 +02:00
pcmcia
ras
rdma RDMA/umem: Fix signature of stub ib_umem_find_best_pgsz() 2020-10-29 09:57:47 +01:00
scsi scsi: iscsi: Fix conn use after free during resets 2021-07-20 16:10:43 +02:00
soc irqchip/eznps: Fix build error for !ARC700 builds 2020-09-17 13:47:47 +02:00
sound ALSA: hda: intel-nhlt: verify config type 2021-03-09 11:09:39 +01:00
target scsi: target: core: Add cmd length set before cmd complete 2021-03-17 17:03:45 +01:00
trace afs: Fix tracepoint string placement with built-in AFS 2021-07-28 13:30:58 +02:00
uapi serial: 8250: Define RX trigger levels for OxSemi 950 devices 2021-09-22 12:26:29 +02:00
vdso
video
xen Xen/gntdev: correct error checking in gntdev_map_grant_pages() 2021-02-23 15:02:26 +01:00