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b93c28ff72
Add a selftest to cover the zswapin code path, allocating more memory than the cgroup limit to trigger swapout/zswapout, then reading the pages back in memory several times. This is inspired by a recently encountered kernel crash on the zswapin path in our internal kernel, which went undetected because of a lack of test coverage for this path. Add a selftest to verify that when memory.zswap.max = 0, no pages can go to the zswap pool for the cgroup. [nphamcs@gmail.com: remove redundant comment, add success checks] Link: https://lkml.kernel.org/r/20240222043132.616320-1-nphamcs@gmail.com Link: https://lkml.kernel.org/r/20240205225608.3083251-4-nphamcs@gmail.com Signed-off-by: Nhat Pham <nphamcs@gmail.com> Suggested-by: Rik van Riel <riel@surriel.com> Suggested-by: Yosry Ahmed <yosryahmed@google.com> Acked-by: Yosry Ahmed <yosryahmed@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Shuah Khan <shuah@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Zefan Li <lizefan.x@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| .gitignore | ||
| cgroup_util.c | ||
| cgroup_util.h | ||
| config | ||
| Makefile | ||
| memcg_protection.m | ||
| test_core.c | ||
| test_cpu.c | ||
| test_cpuset.c | ||
| test_cpuset_prs.sh | ||
| test_freezer.c | ||
| test_hugetlb_memcg.c | ||
| test_kill.c | ||
| test_kmem.c | ||
| test_memcontrol.c | ||
| test_stress.sh | ||
| test_zswap.c | ||
| wait_inotify.c | ||
| with_stress.sh | ||