linux-kernel - [PATCH] vhost-vdpa: account iommu allocations

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Date:   Thu, 30 Nov 2023 20:04:47 +0000
From:   Pasha Tatashin <pasha.tatashin@...een.com>
To:     akpm@...ux-foundation.org, linux-mm@...ck.org,
        pasha.tatashin@...een.com, mst@...hat.com, jasowang@...hat.com,
        kvm@...r.kernel.org, virtualization@...ts.linux.dev,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] vhost-vdpa: account iommu allocations

iommu allocations should be accounted in order to allow admins to
monitor and limit the amount of iommu memory.

Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>
---
 drivers/vhost/vdpa.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

This patch is spinned of from the series:
https://lore.kernel.org/all/20231128204938.1453583-1-pasha.tatashin@soleen.com

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index da7ec77cdaff..a51c69c078d9 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -968,7 +968,8 @@ static int vhost_vdpa_map(struct vhost_vdpa *v, struct vhost_iotlb *iotlb,
 			r = ops->set_map(vdpa, asid, iotlb);
 	} else {
 		r = iommu_map(v->domain, iova, pa, size,
-			      perm_to_iommu_flags(perm), GFP_KERNEL);
+			      perm_to_iommu_flags(perm),
+			      GFP_KERNEL_ACCOUNT);
 	}
 	if (r) {
 		vhost_iotlb_del_range(iotlb, iova, iova + size - 1);
-- 
2.43.0.rc2.451.g8631bc7472-goog