On 5/8/26 03:53, Hao Ge wrote:
> Commit 835de37603ef ("meminfo: add a per node counter for balloon
> drivers") added NR_BALLOON_PAGES and exposed it in /proc/meminfo.
> However, the per-node view at /sys/devices/system/node/nodeX/meminfo
> was not updated, even though the counter is already tracked per-node.
>
> Add it to node_read_meminfo() so users can see balloon usage per
> NUMA node without having to parse the raw vmstat file.
Using ballooning with vNUMA is rather rare. But sure, why not.
>
> Signed-off-by: Hao Ge <[email protected]>
> ---
> drivers/base/node.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/base/node.c b/drivers/base/node.c
> index d7647d077b66..53f4e51d6d82 100644
> --- a/drivers/base/node.c
> +++ b/drivers/base/node.c
> @@ -513,6 +513,7 @@ static ssize_t node_read_meminfo(struct device *dev,
> "Node %d Slab: %8lu kB\n"
> "Node %d SReclaimable: %8lu kB\n"
> "Node %d SUnreclaim: %8lu kB\n"
> + "Node %d Balloon: %8lu kB\n"
> #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> "Node %d AnonHugePages: %8lu kB\n"
> "Node %d ShmemHugePages: %8lu kB\n"
> @@ -543,7 +544,8 @@ static ssize_t node_read_meminfo(struct device *dev,
> node_page_state(pgdat,
> NR_KERNEL_MISC_RECLAIMABLE)),
> nid, K(sreclaimable + sunreclaimable),
> nid, K(sreclaimable),
> - nid, K(sunreclaimable)
> + nid, K(sunreclaimable),
> + nid, K(node_page_state(pgdat, NR_BALLOON_PAGES))
> #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> ,
> nid, K(node_page_state(pgdat, NR_ANON_THPS)),
Shouldn't it be placed under "Unaccepted:", just like for /proc/meminfo?
--
Cheers,
David
