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4e89004eeb
Add test_zswap_incompressible() to verify that the zswap_incomp memcg stat correctly tracks incompressible pages. The test allocates memory filled with random data from /dev/urandom, which cannot be effectively compressed by zswap. When this data is swapped out to zswap, it should be stored as-is and tracked by the zswap_incomp counter. The test verifies that: 1. Pages are swapped out to zswap (zswpout increases) 2. Incompressible pages are tracked (zswap_incomp increases) test: dd if=/dev/zero of=/swapfile bs=1M count=2048 chmod 600 /swapfile mkswap /swapfile swapon /swapfile echo Y > /sys/module/zswap/parameters/enabled ./test_zswap TAP version 13 1..8 ok 1 test_zswap_usage ok 2 test_swapin_nozswap ok 3 test_zswapin ok 4 test_zswap_writeback_enabled ok 5 test_zswap_writeback_disabled ok 6 test_no_kmem_bypass ok 7 test_no_invasive_cgroup_shrink ok 8 test_zswap_incompressible Totals: pass:8 fail:0 xfail:0 xpass:0 skip:0 error:0 Link: https://lkml.kernel.org/r/20260213071827.5688-3-jiayuan.chen@linux.dev Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com> Acked-by: Shakeel Butt <shakeel.butt@linux.dev> Acked-by: Nhat Pham <nphamcs@gmail.com> Reviewed-by: SeongJae Park <sj@kernel.org> Cc: Chengming Zhou <chengming.zhou@linux.dev> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Michal Hocko <mhocko@kernel.org> Cc: Michal Koutný <mkoutny@suse.com> Cc: Muchun Song <muchun.song@linux.dev> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Shuah Khan <shuah@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Yosry Ahmed <yosry.ahmed@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| lib | ||
| .gitignore | ||
| config | ||
| Makefile | ||
| memcg_protection.m | ||
| test_core.c | ||
| test_cpu.c | ||
| test_cpuset.c | ||
| test_cpuset_prs.sh | ||
| test_cpuset_v1_base.sh | ||
| test_cpuset_v1_hp.sh | ||
| test_freezer.c | ||
| test_hugetlb_memcg.c | ||
| test_kill.c | ||
| test_kmem.c | ||
| test_memcontrol.c | ||
| test_pids.c | ||
| test_stress.sh | ||
| test_zswap.c | ||
| wait_inotify.c | ||
| with_stress.sh | ||