diff options
| author | Ritesh Harjani (IBM) <ritesh.list@gmail.com> | 2025-10-30 20:27:33 +0530 |
|---|---|---|
| committer | Madhavan Srinivasan <maddy@linux.ibm.com> | 2025-11-18 12:35:53 +0530 |
| commit | 6394f0e8abe7ca3132faa1321c97c53d0994aecc (patch) | |
| tree | 66596103e56f17e6a048e9d6b2c6b64a33c17d32 | |
| parent | b296fda58d1d095c95c8207b09856b2ceafa1397 (diff) | |
powerpc/64s/pgtable: Enable directMap counters in meminfo for Hash
This patch enables the directMap counters to be printed in proc/meminfo
for Hash mmu. With this patch on a system with 8G of DRAM we can see the
entire RAM mapped with 16M pagesize:
cat /proc/meminfo |grep -i direct
DirectMap4k: 0 kB
DirectMap64k: 0 kB
DirectMap16M: 8388608 kB
DirectMap16G: 0 kB
Tested with devdax too:
root@buildroot:/# ndctl create-namespace -r region0 -m devdax -s 2G
{
"dev":"namespace0.0",
"mode":"devdax",
"map":"dev",
"size":"2032.00 MiB (2130.71 MB)",
"uuid":"aa383ded-cd99-43a0-979f-5225467cfb40",
"daxregion":{
"id":0,
"size":"2032.00 MiB (2130.71 MB)",
"align":16777216,
"devices":[
{
"chardev":"dax0.0",
"size":"2032.00 MiB (2130.71 MB)",
"target_node":0,
"align":"16.00 MiB (16.78 MB)",
"mode":"devdax"
}
]
},
"align":16777216
}
root@buildroot:/# cat /proc/meminfo |grep -i direct
DirectMap4k: 0 kB
DirectMap64k: 0 kB
DirectMap16M: 10485760 kB
DirectMap16G: 0 kB
root@buildroot:/# ndctl destroy-namespace -f all
destroyed 1 namespace
root@buildroot:/# cat /proc/meminfo |grep -i direct
DirectMap4k: 0 kB
DirectMap64k: 0 kB
DirectMap16M: 8388608 kB
DirectMap16G: 0 kB
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/ffe47912e17075649b6ce5b2ee5d7f3eb5352e0b.1761834163.git.ritesh.list@gmail.com
| -rw-r--r-- | arch/powerpc/mm/book3s64/pgtable.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index c9431ae7f78a..e3485db7de02 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -510,20 +510,21 @@ atomic_long_t direct_pages_count[MMU_PAGE_COUNT]; void arch_report_meminfo(struct seq_file *m) { - /* - * Hash maps the memory with one size mmu_linear_psize. - * So don't bother to print these on hash - */ - if (!radix_enabled()) - return; seq_printf(m, "DirectMap4k: %8lu kB\n", atomic_long_read(&direct_pages_count[MMU_PAGE_4K]) << 2); - seq_printf(m, "DirectMap64k: %8lu kB\n", + seq_printf(m, "DirectMap64k: %8lu kB\n", atomic_long_read(&direct_pages_count[MMU_PAGE_64K]) << 6); - seq_printf(m, "DirectMap2M: %8lu kB\n", - atomic_long_read(&direct_pages_count[MMU_PAGE_2M]) << 11); - seq_printf(m, "DirectMap1G: %8lu kB\n", - atomic_long_read(&direct_pages_count[MMU_PAGE_1G]) << 20); + if (radix_enabled()) { + seq_printf(m, "DirectMap2M: %8lu kB\n", + atomic_long_read(&direct_pages_count[MMU_PAGE_2M]) << 11); + seq_printf(m, "DirectMap1G: %8lu kB\n", + atomic_long_read(&direct_pages_count[MMU_PAGE_1G]) << 20); + } else { + seq_printf(m, "DirectMap16M: %8lu kB\n", + atomic_long_read(&direct_pages_count[MMU_PAGE_16M]) << 14); + seq_printf(m, "DirectMap16G: %8lu kB\n", + atomic_long_read(&direct_pages_count[MMU_PAGE_16G]) << 24); + } } #endif /* CONFIG_PROC_FS */ |