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a=xqWC_Br6kY4A:10 a=vUbySO9Y5rIA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=yPCof4ZbAAAA:8 a=B7sye8qDw0amv43tXAkA:9 cc=ntf awl=host:12103 X-Proofpoint-ORIG-GUID: _GRXb06OygH1c-Aqc8MoXldSbPriZeWr X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTI3MDEwNiBTYWx0ZWRfX35DFtTS049hh VzRarb/AQkpwktdijVzHCMUI1W+Argrc9gwU72CbB0fKij609KB4WaPLlpq7ZmCk+A70MDLLq+i WJsxcqAqVsS7NeqsizYc5r8NjvmO7FP75sVpSiBEMHCYAuNX7UlNobFVthZUdxhyA3CgcBX8xlH nmi9xdh99YFjCoUOP+NQqOEun2R8ye2ItLB07Mgx27h6eRiChM6pI8dW6NEuCzw63OtjWe5x17O xHlM1GfMoANs+n/60dVXmlDXvlVgHSyuZj/uqTPq/auNs/rzI7fHDZmfvq3BGJiNEe41zZmB0eT 7Im3IUgaKGshEGqHK3FqxsjJrTSpK9/2lU8lmsRcmRSaioD6VObYjqYXyLtMulNBejK+tpZLQN3 Tt9g4ODy/xhQfozYj1iUGGv5tkoJjarX11ghLGtMBvFe6P0iMq5J5dlrxyrHMzkiMRSzHnoytFm mlUmlYjkbyi9TKia46mTcnuzpvrw7ZKUDsNVXfCY= X-Proofpoint-GUID: _GRXb06OygH1c-Aqc8MoXldSbPriZeWr On 22 Jan 2026, eugene loh outgrape: > From: Eugene Loh > > The run time for this test seems twice as long for aarch64 as for > x86_64. Further, the run time seems to have jumped significantly from > kernel 5.15 to 6.12 and then again to kernel 6.18. E.g., Ew. > x86_64 aarch64 > 5.15 7 secs 18 secs > 6.12 12 secs 33 secs > 6.18 22 secs 54 secs > > Looking at a run on the 6.18 aarch64 system, the time is basically > spent in the dtrace_close() call to dt_probe_detach_all(), which does: > > for (prp = ...) > prp->prov->impl->detach(dtp, prp); > > Then, dt_tp_probe_detach() calls dt_tp_detach(), which does: > > close(tpp->fd); > > This close() averages over 0.1 secs. For hundreds of syscall probes, > we get nearly a minute of run time, exceeding the default test timeout. Sounds like another O(n^2) crept back in somewhere in the kernel :( > For the time being, increase the timeout on this test. > > Signed-off-by: Eugene Loh Reviewed-by: Nick Alcock