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| author | Qi Zheng <zhengqi.arch@bytedance.com> | 2022-08-15 20:47:39 +0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-09-09 19:01:38 +0100 |
| commit | 8eb858c44b98e0326bb32fca34ae671995cd73bb (patch) | |
| tree | 0d31b053090bfd35ecd4b502d8b169132548e484 /Documentation | |
| parent | 3fc24ef32d3b9368f4c103dcd21d6a3f959b4870 (diff) | |
| download | linux-8eb858c44b98e0326bb32fca34ae671995cd73bb.tar.bz2 | |
arm64: run softirqs on the per-CPU IRQ stack
Currently arm64 supports per-CPU IRQ stack, but softirqs
are still handled in the task context.
Since any call to local_bh_enable() at any level in the task's
call stack may trigger a softirq processing run, which could
potentially cause a task stack overflow if the combined stack
footprints exceed the stack's size, let's run these softirqs
on the IRQ stack as well.
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220815124739.15948-1-zhengqi.arch@bytedance.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions