linux-kernel - [PATCH v4 6/7] drivers: vmware: balloon

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Date:   Wed,  5 Oct 2022 12:01:56 +0300
From:   Alexander Atanasov <alexander.atanasov@...tuozzo.com>
To:     Nadav Amit <namit@...are.com>,
        VMware PV-Drivers Reviewers <pv-drivers@...are.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     kernel@...nvz.org,
        Alexander Atanasov <alexander.atanasov@...tuozzo.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 6/7] drivers: vmware: balloon - report inflated memory

Propagate inflated memory changes to mm.

Signed-off-by: Alexander Atanasov <alexander.atanasov@...tuozzo.com>
---
 drivers/misc/vmw_balloon.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
index 91d4d2a285c5..ce581e3d101c 100644
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -1161,6 +1161,8 @@ static void vmballoon_inflate(struct vmballoon *b)
 
 		cond_resched();
 	}
+	/* Update core after inflation is done - send a single notification */
+	balloon_set_inflated_free(atomic64_read(&b->size) << 2);
 
 	/*
 	 * Release pages that were allocated while attempting to inflate the
@@ -1285,6 +1287,8 @@ static unsigned long vmballoon_deflate(struct vmballoon *b, uint64_t n_frames,
 
 		cond_resched();
 	}
+	/* Update core after deflation is done - send a single notification */
+	balloon_set_inflated_free(atomic64_read(&b->size) << 2);
 
 	return deflated_frames;
 }
-- 
2.31.1