Re: [PATCH v4] mm: cma: support sysfs
From: Dmitry Osipenko
Date: Fri Mar 19 2021 - 13:45:11 EST
19.03.2021 20:41, Dmitry Osipenko пишет:
> 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?
Although, please scratch that. I see now that these functions are called
outside of the lock.