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| author | Dylan Yudaken <dylany@fb.com> | 2022-04-05 11:54:14 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2022-04-16 10:46:44 +0200 |
| commit | bad3fbb2568abf8a9744720c5ef3a5ffc97531c9 (patch) | |
| tree | c799789d302a8ee7a87e468ffc09d490c56d4c4c /Documentation/fault-injection | |
| parent | Documentation: arch_pgtable_helpers: demote pgtable list headings (diff) | |
| download | linux-bad3fbb2568abf8a9744720c5ef3a5ffc97531c9.tar.xz linux-bad3fbb2568abf8a9744720c5ef3a5ffc97531c9.zip | |
docs: fault-injection: fix defaults
ignore-gfp-wait and ignore-gfp-highmem defaults are actually true (Y) in
both failslab and fail_page_alloc, not false as the docs suggest. See
page_alloc.c:3762 and failslab.c:13
At the same time use 'Y' instead of '1' in the example scripts just for
consistency. (though 1 would work)
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/fault-injection')
| -rw-r--r-- | Documentation/fault-injection/fault-injection.rst | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/Documentation/fault-injection/fault-injection.rst b/Documentation/fault-injection/fault-injection.rst index 4a25c5eb6f07..eb9c2d9a4f5f 100644 --- a/Documentation/fault-injection/fault-injection.rst +++ b/Documentation/fault-injection/fault-injection.rst @@ -132,16 +132,16 @@ configuration of fault-injection capabilities. Format: { 'Y' | 'N' } - default is 'N', setting it to 'Y' won't inject failures into - highmem/user allocations. + default is 'Y', setting it to 'N' will also inject failures into + highmem/user allocations (__GFP_HIGHMEM allocations). - /sys/kernel/debug/failslab/ignore-gfp-wait: - /sys/kernel/debug/fail_page_alloc/ignore-gfp-wait: Format: { 'Y' | 'N' } - default is 'N', setting it to 'Y' will inject failures - only into non-sleep allocations (GFP_ATOMIC allocations). + default is 'Y', setting it to 'N' will also inject failures + into allocations that can sleep (__GFP_DIRECT_RECLAIM allocations). - /sys/kernel/debug/fail_page_alloc/min-order: @@ -280,7 +280,7 @@ Application Examples printf %#x -1 > /sys/kernel/debug/$FAILTYPE/times echo 0 > /sys/kernel/debug/$FAILTYPE/space echo 2 > /sys/kernel/debug/$FAILTYPE/verbose - echo 1 > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait + echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait faulty_system() { @@ -334,8 +334,8 @@ Application Examples printf %#x -1 > /sys/kernel/debug/$FAILTYPE/times echo 0 > /sys/kernel/debug/$FAILTYPE/space echo 2 > /sys/kernel/debug/$FAILTYPE/verbose - echo 1 > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait - echo 1 > /sys/kernel/debug/$FAILTYPE/ignore-gfp-highmem + echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait + echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-highmem echo 10 > /sys/kernel/debug/$FAILTYPE/stacktrace-depth trap "echo 0 > /sys/kernel/debug/$FAILTYPE/probability" SIGINT SIGTERM EXIT |