On 8/12/21 12:58 PM, Michael Ellerman wrote:
Christophe Leroy <christophe.le...@csgroup.eu> writes:
Le 10/08/2021 à 06:53, Aneesh Kumar K.V a écrit :
Similar to x86/s390 add a debugfs file to tune tlb_single_page_flush_ceiling.
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
---
arch/powerpc/mm/book3s64/radix_tlb.c | 48 ++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c
b/arch/powerpc/mm/book3s64/radix_tlb.c
index aefc100d79a7..5cca0fe130e7 100644
--- a/arch/powerpc/mm/book3s64/radix_tlb.c
+++ b/arch/powerpc/mm/book3s64/radix_tlb.c
@@ -17,6 +17,7 @@
...
+
+static int __init create_tlb_single_page_flush_ceiling(void)
+{
+ debugfs_create_file("tlb_single_page_flush_ceiling", S_IRUSR | S_IWUSR,
+ powerpc_debugfs_root, NULL, &fops_tlbflush);
Could you just use debugfs_create_u32() instead of re-implementing simple read
and write ?
Yeah AFAICS that should work fine.
It could probably even be a u16?
I was looking at switching all that to u64. Should i fallback to u16,
considering a tlb_signle_page_flush_ceiling value larger that 2**16
doesn't make sense?
-aneesh
