From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Return the number of reclaimed pages from sgx_reclaim_pages(), the EPC
cgroup will use the result to track the success rate of its reclaim
calls, e.g. to escalate to a more forceful reclaiming mode if necessary.
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Signed-off-by: Kristen Carlson Accardi <kristen@xxxxxxxxxxxxxxx>
Cc: Sean Christopherson <seanjc@xxxxxxxxxx>
---
arch/x86/kernel/cpu/sgx/main.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index f201ca85212f..a4a65eadfb79 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -291,7 +291,7 @@ static void sgx_reclaimer_write(struct sgx_epc_page *epc_page,
* problematic as it would increase the lock contention too much, which would
* halt forward progress.
*/
-static void __sgx_reclaim_pages(int nr_to_scan)
+static int __sgx_reclaim_pages(int nr_to_scan)
{
struct sgx_backing backing[SGX_MAX_NR_TO_RECLAIM];
struct sgx_epc_page *epc_page, *tmp;
@@ -326,7 +326,7 @@ static void __sgx_reclaim_pages(int nr_to_scan)
spin_unlock(&sgx_global_lru.lock);
if (list_empty(&iso))
- return;
+ return 0;
i = 0;
list_for_each_entry_safe(epc_page, tmp, &iso, list) {
@@ -374,12 +374,16 @@ static void __sgx_reclaim_pages(int nr_to_scan)
sgx_free_epc_page(epc_page);
}
+ return i;
}
-static void sgx_reclaim_pages(int nr_to_scan)
+static int sgx_reclaim_pages(int nr_to_scan)
{
- __sgx_reclaim_pages(nr_to_scan);
+ int ret;
+
+ ret = __sgx_reclaim_pages(nr_to_scan);
cond_resched();
+ return ret;
}
static bool sgx_should_reclaim(unsigned long watermark)
--
2.38.1
