KVM: selftests: Randomize dirty_log_test's delay before reaping the bitmap

Browse source

In the dirty log test, randomize the delay before the initial call to get
the dirty log bitmap for a given iteration, so that the amount of memory
dirtied by the guest varies from iteration to iteration, and so that the
user can effectively control the duration (by increasing the interval).

Always waiting 1ms effectively hides a KVM RISC-V bug as the test reaps the
dirty bitmap before the guest has a chance to trigger the problematic flow
in KVM.

Reported-by: Wu Fei <wu.fei9@sanechips.com.cn>
Closes: https://lore.kernel.org/all/202605111130.64BBUXDN013040@mse-fl2.zte.com.cn
Cc: Wu Fei <atwufei@163.com>
Link: https://patch.msgid.link/20260522170230.3518669-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

...

This commit is contained in:

Sean Christopherson 2026-05-22 10:02:30 -07:00

parent 3e8a0b9912

commit 4e0fdd9b0d

1 changed files with 20 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

26

tools/testing/selftests/kvm/dirty_log_test.c

View file