drm/i915/selftests: Try to recycle context allocations

igt_ctx_exec allocates a new context for each iteration, keeping them
all allocated until the end. Instead, release the local ctx reference at
the end of each iteration, allowing ourselves to reap those if under
mempressure.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190827161726.3640-2-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index 63116c4..da54a71 100644 (file)
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -424,7 +424,7 @@ static int igt_ctx_exec(void *arg)
                        struct i915_gem_context *ctx;
                        struct intel_context *ce;
 
-                       ctx = live_context(i915, file);
+                       ctx = kernel_context(i915);
                        if (IS_ERR(ctx)) {
                                err = PTR_ERR(ctx);
                                goto out_unlock;
@@ -438,6 +438,7 @@ static int igt_ctx_exec(void *arg)
                                if (IS_ERR(obj)) {
                                        err = PTR_ERR(obj);
                                        intel_context_put(ce);
+                                       kernel_context_close(ctx);
                                        goto out_unlock;
                                }
                        }
@@ -449,12 +450,14 @@ static int igt_ctx_exec(void *arg)
                                       engine->name, ctx->hw_id,
                                       yesno(!!ctx->vm), err);
                                intel_context_put(ce);
+                               kernel_context_close(ctx);
                                goto out_unlock;
                        }
 
                        err = throttle(ce, tq, ARRAY_SIZE(tq));
                        if (err) {
                                intel_context_put(ce);
+                               kernel_context_close(ctx);
                                goto out_unlock;
                        }
 
@@ -467,6 +470,7 @@ static int igt_ctx_exec(void *arg)
                        ncontexts++;
 
                        intel_context_put(ce);
+                       kernel_context_close(ctx);
                }
 
                pr_info("Submitted %lu contexts to %s, filling %lu dwords\n",