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sm=1 tr=0 ts=6aecb35f b=1 cx=c_pps a=e1sVV491RgrpLwSTMOnk8w==:117 a=e1sVV491RgrpLwSTMOnk8w==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=zJRp6_cAMcgA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=EIcjfB9IiI4px24ztqRk:22 a=yPCof4ZbAAAA:8 a=HnaOQimmWgcX9jMELl0A:9 a=QEXdDO2ut3YA:10 a=5yU3S35YU4bGjq-dph-N:22 a=Bho9c0fBagfJEIQBS7DQ:22 cc=ntf awl=host:13532 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTA1MDA2NiBTYWx0ZWRfX47v/BoZ+6rBo gudbBq39ATqyG9/0EofEQkPnB4fYDg1WyXp0OntdrWEax4ju/ittlSdDKvoPbHhXsaD+b6YfuZq 9gtlXH8xcYfodYqmupf4KJgVo11wDaR+ftn69uApACS9dRLNjl9jBWSCahMWrfxEZhHe16Pz5Ty ig9ZgNo6oDqVRwFg7Dr7Fw4zi8IQ+pXEuEh6NGTFqh7xlPYxuC6daf2SvyWIEdlcsMueZCAsGLE 31h1qWylOSqi7q05YGL6skkToM+cXJv3I1I3RUbP+Oc/sdRUXPTxt/kOxxpTjzNEg4kdk5Ym4K/ QPkX4JAUdGLLoNBtvX2eZvEUovTfVRCIstk9UtzhZt7+W7EpEjRDsCxULutsMMaTE63Ypd/jy9N ZHA1XS95/Hmo3UFcFCE0/zsNdLBuXcbyTUiFiePzWktcQLZQ+tO4YmIJ62mHI4ikabnhPWN/kDd kr1cE6s7mOB4rYuIQ9gDYOaMWk1ejYf9A0r4d4TY= X-Proofpoint-Spam-Info: AW1haW4tMjYxMTA1MDA2NiBTYWx0ZWRfX4Ok+Eid1TgTl PMcra2lCFa1TjWA3Vflj851tPlJn5BiGQfT8jMyRPCLGFzcdfpnwMZj7WkUWWqxgEWiVs8E54h7 uY1Xvi+XqOoNYvh13qrdFo+wcyAKCUO07cXdIfA54z4v6G7qAks/ On 11/4/26 12:58 PM, Namhyung Kim wrote: > On Tue, Oct 13, 2026 at 02:38:41PM -0700, Stephen Brennan wrote: >> Applications can place JIT-compiled code in POSIX shared memory so that >> multiple processes can execute the same code. On Linux, these shared >> memory objects appear as file mappings under /dev/shm. >> >> Perf uses /tmp/perf-$pid.map to resolve symbols for executable SysV >> shared memory mappings, but it treats /dev/shm mappings as ordinary >> DSOs. As a result, applications which provide perf-map symbols for JIT >> code in POSIX shared memory don't get those symbols resolved, while they >> do with SysV shared memory. >> >> It would be incorrect to classify every /dev/shm mapping as no-DSO >> memory though, because /dev/shm is just a tmpfs mount, and it can >> contain ELF files. >> >> Add a filename prefix "/dev/shm/no-dso." which is recognized by >> is_no_dso_memory(). Applications can opt-in by naming their shared >> memory objects "no-dso.". Executable mappings with this prefix >> will use the perf-map file, while other /dev/shm mappings will keep the >> existing behavior. This allows applications that already emit perf maps >> to use POSIX shared memory for JIT code, without needing to implement >> jitdump support. >> >> Signed-off-by: Stephen Brennan > > Applied to perf-tools-next, thanks! Thank you! Stephen > Best regards > Namhyung