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Eo7uTj8NAUcGIW9z7JANBXVFLGkS3qAc8zhKyR0S5naRg+JsCCBR/YatDP0H6Sfm+eXF8Sp1Gc86vZyPTYgBHv2KvbULoTvOEnhRKXGRVvzXFUvibEfYHnhIryrhFCCv9bHcWRFUMxd1B2krQ+043gganA3XFL4WsydTWUd0C2Fs+Yl8HDpzfnzXP/I9/Wpeu0rQFfa9aTHhq0e/ykjy3TIQgSGTECsixrxJKhjHbSkHXC0LJhvvED8vanTfMAuRz0OtQsmxlxVPL9YUpICRNWPK5xMmwUbQa/wcnKYGCRXm1Uw7DTQIp5xqP0M2TCDnjWRfMnx8BYjVH0a0TKEWk+acJEZtaZU6W/1bouZbosamVKP7K6nqT5lzkT7hPKCkJr824phTIQszDCHGtKi5Unygo00OjeByGGJHU2z43epkFCBYTEKDT9eUdV2DxT29xmDXBzlodR+z90m62+mhb+jOsyq8KDm3CYoqYycW0DaWRG1G0VJAvJEQXRnSBH43QyzJDINp5ZYVqaamrjPwWpBoLN1K9DgRXNxLrEri7AWgBInwTW2QOfOV5dDi9GPkh/SpMDWNYqr/u/UlVVlXyuR/3AUOaqbqNkhisxraX/0/o9zYUmjchzsX1GYH0mp0rZx7W2Mi9ARCp9ifViW3UdEq5mEvRzWDs78IB7pQw6LGyKAb0CKZKVn9tsvVkEOPyRNcTsUarwbh8JvjYmWAtMCMnww== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 6/19/25 09:20, Dave Airlie wrote: > From: Dave Airlie > > While discussing memcg intergration with gpu memory allocations, > it was pointed out that there was no numa/system counters for > GPU memory allocations. > > With more integrated memory GPU server systems turning up, and > more requirements for memory tracking it seems we should start > closing the gap. > > Add two counters to track GPU per-node system memory allocations. > > The first is currently allocated to GPU objects, and the second > is for memory that is stored in GPU page pools that can be reclaimed, > by the shrinker. > > Cc: Christian Koenig > Cc: Matthew Brost > Cc: Johannes Weiner > Cc: linux-mm@kvack.org > Cc: Andrew Morton > Signed-off-by: Dave Airlie > > --- > > v2: add more info to the documentation on this memory. > > I'd like to get acks to merge this via the drm tree, if possible, > > Dave. > --- > Documentation/filesystems/proc.rst | 8 ++++++++ > drivers/base/node.c | 5 +++++ > fs/proc/meminfo.c | 6 ++++++ > include/linux/mmzone.h | 2 ++ > mm/show_mem.c | 9 +++++++-- > mm/vmstat.c | 2 ++ > 6 files changed, 30 insertions(+), 2 deletions(-) > > diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst > index 5236cb52e357..7cc5a9185190 100644 > --- a/Documentation/filesystems/proc.rst > +++ b/Documentation/filesystems/proc.rst > @@ -1095,6 +1095,8 @@ Example output. You may not have all of these fields. > CmaFree: 0 kB > Unaccepted: 0 kB > Balloon: 0 kB > + GPUActive: 0 kB > + GPUReclaim: 0 kB Active certainly makes sense, but I think we should rather disable the pool on newer CPUs than adding reclaimable memory here. Regards, Christian. > HugePages_Total: 0 > HugePages_Free: 0 > HugePages_Rsvd: 0 > @@ -1273,6 +1275,12 @@ Unaccepted > Memory that has not been accepted by the guest > Balloon > Memory returned to Host by VM Balloon Drivers > +GPUActive > + System memory allocated to active GPU objects > +GPUReclaim > + System memory stored in GPU pools for reuse. This memory is not > + counted in GPUActive. It is shrinker reclaimable memory kept in a reuse > + pool because it has non-standard page table attributes, like WC or UC. > HugePages_Total, HugePages_Free, HugePages_Rsvd, HugePages_Surp, Hugepagesize, Hugetlb > See Documentation/admin-guide/mm/hugetlbpage.rst. > DirectMap4k, DirectMap2M, DirectMap1G > diff --git a/drivers/base/node.c b/drivers/base/node.c > index c19094481630..64406862314b 100644 > --- a/drivers/base/node.c > +++ b/drivers/base/node.c > @@ -463,6 +463,8 @@ static ssize_t node_read_meminfo(struct device *dev, > #ifdef CONFIG_UNACCEPTED_MEMORY > "Node %d Unaccepted: %8lu kB\n" > #endif > + "Node %d GPUActive: %8lu kB\n" > + "Node %d GPUReclaim: %8lu kB\n" > , > nid, K(node_page_state(pgdat, NR_FILE_DIRTY)), > nid, K(node_page_state(pgdat, NR_WRITEBACK)), > @@ -496,6 +498,9 @@ static ssize_t node_read_meminfo(struct device *dev, > , > nid, K(sum_zone_node_page_state(nid, NR_UNACCEPTED)) > #endif > + , > + nid, K(node_page_state(pgdat, NR_GPU_ACTIVE)), > + nid, K(node_page_state(pgdat, NR_GPU_RECLAIM)) > ); > len += hugetlb_report_node_meminfo(buf, len, nid); > return len; > diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c > index bc2bc60c36cc..334948744e55 100644 > --- a/fs/proc/meminfo.c > +++ b/fs/proc/meminfo.c > @@ -164,6 +164,12 @@ static int meminfo_proc_show(struct seq_file *m, void *v) > show_val_kb(m, "Balloon: ", > global_node_page_state(NR_BALLOON_PAGES)); > > + show_val_kb(m, "GPUActive: ", > + global_node_page_state(NR_GPU_ACTIVE)); > + > + show_val_kb(m, "GPUReclaim: ", > + global_node_page_state(NR_GPU_RECLAIM)); > + > hugetlb_report_meminfo(m); > > arch_report_meminfo(m); > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h > index 283913d42d7b..458a3465dd8f 100644 > --- a/include/linux/mmzone.h > +++ b/include/linux/mmzone.h > @@ -241,6 +241,8 @@ enum node_stat_item { > NR_HUGETLB, > #endif > NR_BALLOON_PAGES, > + NR_GPU_ACTIVE, /* GPU pages assigned to an object */ > + NR_GPU_RECLAIM, /* GPU pages in shrinkable pools */ > NR_VM_NODE_STAT_ITEMS > }; > > diff --git a/mm/show_mem.c b/mm/show_mem.c > index 0cf8bf5d832d..072d33a50148 100644 > --- a/mm/show_mem.c > +++ b/mm/show_mem.c > @@ -255,7 +255,9 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z > " sec_pagetables:%lukB" > " all_unreclaimable? %s" > " Balloon:%lukB" > - "\n", > + " gpu_active:%lukB" > + " gpu_reclaim:%lukB" > + "\n", > pgdat->node_id, > K(node_page_state(pgdat, NR_ACTIVE_ANON)), > K(node_page_state(pgdat, NR_INACTIVE_ANON)), > @@ -281,7 +283,10 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z > K(node_page_state(pgdat, NR_PAGETABLE)), > K(node_page_state(pgdat, NR_SECONDARY_PAGETABLE)), > str_yes_no(pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES), > - K(node_page_state(pgdat, NR_BALLOON_PAGES))); > + K(node_page_state(pgdat, NR_BALLOON_PAGES)), > + K(node_page_state(pgdat, NR_GPU_ACTIVE)), > + K(node_page_state(pgdat, NR_GPU_RECLAIM))); > + > } > > for_each_populated_zone(zone) { > diff --git a/mm/vmstat.c b/mm/vmstat.c > index 429ae5339bfe..25a74cf29473 100644 > --- a/mm/vmstat.c > +++ b/mm/vmstat.c > @@ -1281,6 +1281,8 @@ const char * const vmstat_text[] = { > "nr_hugetlb", > #endif > "nr_balloon_pages", > + "nr_gpu_active", > + "nr_gpu_reclaim", > /* system-wide enum vm_stat_item counters */ > "nr_dirty_threshold", > "nr_dirty_background_threshold",