linux-kernel - [PATCH 09/20] sched/numa: do not scan msharefs vmas

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Message-ID: <20250124235454.84587-10-anthony.yznaga@oracle.com>
Date: Fri, 24 Jan 2025 15:54:43 -0800
From: Anthony Yznaga <anthony.yznaga@...cle.com>
To: akpm@...ux-foundation.org, willy@...radead.org, markhemm@...glemail.com,
        viro@...iv.linux.org.uk, david@...hat.com, khalid@...nel.org
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Subject: [PATCH 09/20] sched/numa: do not scan msharefs vmas

Scanning an msharefs vma results changes to the shared page table
but with TLB flushes only going to the process with the vma.

Signed-off-by: Anthony Yznaga <anthony.yznaga@...cle.com>
---
 kernel/sched/fair.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 3e9ca38512de..e9aa1e35f40e 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3374,7 +3374,8 @@ static void task_numa_work(struct callback_head *work)
 
 	for (; vma; vma = vma_next(&vmi)) {
 		if (!vma_migratable(vma) || !vma_policy_mof(vma) ||
-			is_vm_hugetlb_page(vma) || (vma->vm_flags & VM_MIXEDMAP)) {
+			is_vm_hugetlb_page(vma) || (vma->vm_flags & VM_MIXEDMAP) ||
+			vma_is_mshare(vma)) {
 			trace_sched_skip_vma_numa(mm, vma, NUMAB_SKIP_UNSUITABLE);
 			continue;
 		}
-- 
2.43.5