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| author |   Chen Yu <yu.c.chen@intel.com> | 2023-09-06 12:18:52 +0800 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-09-12 11:45:15 +0200 |
| commit | 148b6f4cc3920e563094540fe1a12d00d3bbccae (patch) | |
| tree | 34d6818c87ebde181ae5aa0c53b274c86d552bc7 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | PM: hibernate: Rename function parameter from snapshot_test to exclusive (diff) | |
| download | wireguard-linux-148b6f4cc3920e563094540fe1a12d00d3bbccae.tar.xz wireguard-linux-148b6f4cc3920e563094540fe1a12d00d3bbccae.zip | |
PM: hibernate: Fix the exclusive get block device in test_resume mode
Commit 5904de0d735b ("PM: hibernate: Do not get block device exclusively
in test_resume mode") fixes a hibernation issue under test_resume mode.
That commit is supposed to open the block device in non-exclusive mode
when in test_resume. However the code does the opposite, which is against
its description.
In summary, the swap device is only opened exclusively by swsusp_check()
with its corresponding *close(), and must be in non test_resume mode.
This is to avoid the race condition that different processes scribble the
device at the same time. All the other cases should use non-exclusive mode.
Fix it by really disabling exclusive mode under test_resume.
Fixes: 5904de0d735b ("PM: hibernate: Do not get block device exclusively in test_resume mode")
Closes: https://lore.kernel.org/lkml/000000000000761f5f0603324129@google.com/
Reported-by: Pengfei Xu <pengfei.xu@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Tested-by: Chenzhou Feng <chenzhoux.feng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions