Re: [PATCH v4] mm: cma: support sysfs
From: Dmitry Osipenko <digetx@gmail.com>
Date: 2021-03-19 17:42:29
Also in:
linux-tegra, lkml
19.03.2021 20:29, Dmitry Osipenko пишет:
+void cma_sysfs_alloc_pages_count(struct cma *cma, size_t count)
+{
+ atomic64_add(count, &cma->nr_pages_succeeded);
+}
+
+void cma_sysfs_fail_pages_count(struct cma *cma, size_t count)
+{
+ atomic64_add(count, &cma->nr_pages_failed);
+}The atomic looks good, but aren't CMA allocations already protected by the CMA core? Do we really need to worry about racing here?