Hi, On Wed, Apr 14, 2021 at 06:34:34PM +0200, glittao@xxxxxxxxx wrote: > From: Oliver Glitta <glittao@xxxxxxxxx> > > Many stack traces are similar so there are many similar arrays. > Stackdepot saves each unique stack only once. > > Replace field addrs in struct track with depot_stack_handle_t handle. > Use stackdepot to save stack trace. > > The benefits are smaller memory overhead and possibility to aggregate > per-cache statistics in the future using the stackdepot handle > instead of matching stacks manually. > > Signed-off-by: Oliver Glitta <glittao@xxxxxxxxx> With arcv2:allnoconfig, this patch results in: Building arcv2:allnoconfig ... failed -------------- Error log: arc-elf-ld: lib/stackdepot.o: in function `filter_irq_stacks': stackdepot.c:(.text+0x43a): undefined reference to `__irqentry_text_start' arc-elf-ld: stackdepot.c:(.text+0x43a): undefined reference to `__irqentry_text_start' arc-elf-ld: stackdepot.c:(.text+0x45a): undefined reference to `__irqentry_text_end' arc-elf-ld: stackdepot.c:(.text+0x45a): undefined reference to `__irqentry_text_end' arc-elf-ld: stackdepot.c:(.text+0x468): undefined reference to `__softirqentry_text_start' arc-elf-ld: stackdepot.c:(.text+0x468): undefined reference to `__softirqentry_text_start' arc-elf-ld: stackdepot.c:(.text+0x470): undefined reference to `__softirqentry_text_end' arc-elf-ld: stackdepot.c:(.text+0x470): undefined reference to `__softirqentry_text_end' Guenter --- # bad: [fb0ca446157a86b75502c1636b0d81e642fe6bf1] Add linux-next specific files for 20210701 # good: [62fb9874f5da54fdb243003b386128037319b219] Linux 5.13 git bisect start 'HEAD' 'v5.13' # good: [f63c4fda987a19b1194cc45cb72fd5bf968d9d90] Merge remote-tracking branch 'rdma/for-next' git bisect good f63c4fda987a19b1194cc45cb72fd5bf968d9d90 # good: [49c8769be0b910d4134eba07cae5d9c71b861c4a] Merge remote-tracking branch 'drm/drm-next' git bisect good 49c8769be0b910d4134eba07cae5d9c71b861c4a # good: [3b858fe26f206d3c65adfc06c4db473e2dcaacd2] Merge remote-tracking branch 'char-misc/char-misc-next' git bisect good 3b858fe26f206d3c65adfc06c4db473e2dcaacd2 # good: [b7289b49bb2edbe261f3f9a554f02996a4d12c11] Merge remote-tracking branch 'cgroup/for-next' git bisect good b7289b49bb2edbe261f3f9a554f02996a4d12c11 # good: [20bf25c2b863e97a2724092c234e1ce892f83e5c] Merge remote-tracking branch 'pwm/for-next' git bisect good 20bf25c2b863e97a2724092c234e1ce892f83e5c # good: [1446f64f402a42c74c60df7f255df666fe302412] linux-next-pre git bisect good 1446f64f402a42c74c60df7f255df666fe302412 # good: [312d598a2ea9e0927c3ec1decf24d4f3693e06f1] Merge remote-tracking branch 'mhi/mhi-next' git bisect good 312d598a2ea9e0927c3ec1decf24d4f3693e06f1 # good: [d266180aa2811c7b6a8cf3c44e40a8f02a543a23] Merge remote-tracking branch 'cxl/next' git bisect good d266180aa2811c7b6a8cf3c44e40a8f02a543a23 # bad: [8cf245ab25c7db5c10e7f63dcff2ccf09ade5880] sh: convert to setup_initial_init_mm() git bisect bad 8cf245ab25c7db5c10e7f63dcff2ccf09ade5880 # bad: [125069500be687630bcfe6daa80f5408912fc3ef] mm-introduce-memfd_secret-system-call-to-create-secret-memory-areas-fix git bisect bad 125069500be687630bcfe6daa80f5408912fc3ef # good: [c6c08f08ff06799b2c84e2a6a6258537a323d584] hexagon: use common DISCARDS macro git bisect good c6c08f08ff06799b2c84e2a6a6258537a323d584 # bad: [e50e7ac989f6c658fd7b28b14274ae230825b1f9] mm/slub: use stackdepot to save stack trace in objects-fix git bisect bad e50e7ac989f6c658fd7b28b14274ae230825b1f9 # bad: [d1be1dcc08d3ba68331dd47cfdea155f016c79db] mm/slub: use stackdepot to save stack trace in objects git bisect bad d1be1dcc08d3ba68331dd47cfdea155f016c79db # good: [8bf985a45ac528b6bcfbbdec4c3c263240b34264] hexagon: select ARCH_WANT_LD_ORPHAN_WARN git bisect good 8bf985a45ac528b6bcfbbdec4c3c263240b34264 # first bad commit: [d1be1dcc08d3ba68331dd47cfdea155f016c79db] mm/slub: use stackdepot to save stack trace in objects
