Messages in this thread | | | Date | Fri, 18 Feb 2022 18:46:11 +0800 | From | Leo Yan <> | Subject | Re: [PATCH v2] perf test: Skip Sigtrap test for arm+aarch64 |
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On Fri, Feb 18, 2022 at 05:33:33PM +0800, John Garry wrote: > Skip the Sigtrap test for arm + arm64, same as was done for s390 in > commit a840974e96fd ("perf test: Test 73 Sig_trap fails on s390"). For > this, reuse BP_SIGNAL_IS_SUPPORTED - meaning that the arch can use BP to > generate signals - instead of BP_ACCOUNT_IS_SUPPORTED, which is > appropriate. > > As described by Will at [0], in the test we get stuck in a loop of handling > the HW breakpoint exception and never making progress. GDB handles this > by stepping over the faulting instruction, but with perf the kernel is > expected to handle the step (which it doesn't for arm). > > Dmitry made an attempt to get this work, also mentioned in the same thread > as [0], which was appreciated. But the best thing to do is skip the test > for now. > > [0] https://lore.kernel.org/linux-perf-users/20220118124343.GC98966@leoy-ThinkPad-X240s/T/#m13b06c39d2a5100d340f009435df6f4d8ee57b5a > > Fixes: Fixes: 5504f67944484 ("perf test sigtrap: Add basic stress test for sigtrap handling") > Signed-off-by: John Garry <john.garry@huawei.com>
I tested this patch on my Juno board:
root@Juno:# ./perf test 73 73: Sigtrap : Skip
Tested-by: Leo Yan <leo.yan@linaro.org>
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