linux-kernel - [PATCH 5.2 028/143] habanalabs: fix DRAM usage accounting on context tear down

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Message-Id: <20190904175315.161061753@linuxfoundation.org>
Date:   Wed,  4 Sep 2019 19:52:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tomer Tayar <ttayar@...ana.ai>,
        Oded Gabbay <oded.gabbay@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.2 028/143] habanalabs: fix DRAM usage accounting on context tear down

[ Upstream commit c8113756ba27298d6e95403c087dc5881b419a99 ]

The patch fix the DRAM usage accounting by adding a missing update of
the DRAM memory consumption, when a context is being torn down without an
organized release of the allocated memory.

Signed-off-by: Tomer Tayar <ttayar@...ana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@...il.com>
Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/misc/habanalabs/memory.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/habanalabs/memory.c b/drivers/misc/habanalabs/memory.c
index 693877e37fd87..924a438ba9736 100644
--- a/drivers/misc/habanalabs/memory.c
+++ b/drivers/misc/habanalabs/memory.c
@@ -1629,6 +1629,8 @@ void hl_vm_ctx_fini(struct hl_ctx *ctx)
 			dev_dbg(hdev->dev,
 				"page list 0x%p of asid %d is still alive\n",
 				phys_pg_list, ctx->asid);
+			atomic64_sub(phys_pg_list->total_size,
+					&hdev->dram_used_mem);
 			free_phys_pg_pack(hdev, phys_pg_list);
 			idr_remove(&vm->phys_pg_pack_handles, i);
 		}
-- 
2.20.1