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Thu, 13 Mar 2025 12:37:52 -0700 (PDT) MIME-Version: 1.0 From: Matt Fleming Date: Thu, 13 Mar 2025 19:37:41 +0000 X-Gm-Features: AQ5f1JqQuLXCq7ax1NgSoKdOfMwhjzm_3J2THhsYKLDjW7uwQq5XdjcANjMxTo4 Message-ID: Subject: stackdepot: Thoughts on increasing DEPOT_MAX_POOLS? To: Alexander Potapenko , Marco Elver , Oscar Salvador Cc: linux-mm@kvack.org, Vlastimil Babka , Andrew Morton , kernel-team Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: C5A4F100012 X-Stat-Signature: qymcx6ah8ucoijhe97i5bjgy5fj5ea1f X-HE-Tag: 1741894673-942020 X-HE-Meta: U2FsdGVkX1/sd2YAlsSeHEJW81VG4n6j2WMrcaP1VhH6h9AGEqp7Tz5TNR4pyTXwHGFHlfI6lnSdy44oPUmuuZCb3VtFJNGG+hV/Sp5y7xO/RHcez5e3nD9tKwYO/RienEATp4TrnQBsnT5mEHvJpA59WEDH53fmxk/nte+x38AhRecTR3hMasKhsQplrmQpNvtcY1OGzndy1hwjxkL9VhKnKQOwdGIyPHaacFblgiB13G5vHGMA+6cFXLPi14qzkvg3PA3cBM/zcD4HudA29GApEWpeUOwZANSGQ8GbaKPxNE6x8EwwmpZmGt7nkZTMm7UjKBkeJ87Co/E/PQWTKzL2Vku7p+C/FNffxI/eSmbMbedk2Gw11qOqiQdNxgoc1cxerhR2HH1e/q8U7b1CaplVs7Fu7si92nciAywleTARLA9OsPJXoHSs8FPUJ292ticIcTrtj4bgchAMH0J+9OeO3BTKs4Djp5bSMT0UrgHrKAUDR+M1ePgT0V3KbsRBIusUw0458zukCPUvY7M3HHnDuS6la4lZnlHJy4wijqroa1aE38Hwg33hUw1CKXtWdJh7CYtiZZLhO42hhpJuZdZhL/6Q+v1ZNM5ZqaCRX8xl+YAXVKl0/wv5glT/VzF3P0e+QIdxr2foNpZsoHDa4fBn7pD7J4caowVzcCmufNXGd6SBpW1HvYqawUHi/txDQ8+NWEA7xYaonQQayBHdTCPnF+GRjPlXUFN5uBIeFggLlj7gnhkDsqji8zOQYKhm6IvKcGQnpF/6dIUWCzerPFpNfzWMBpl4/8cGggqimDXjfI4wLiI0ejgyeEKMDpuKog3TPih95+Y/aOewVKPn8ONoGIbXkbZt0gRMyqgEFc3Gp2O9kEoTOqjYc/qRrK11BUU68jPje0GgKcbM6SHyY9RB/2mnvYOm1gDhEMmFk5L4qhSewAgz6upNdVjUrtyOTkHAC3O1pbpWKfMspsp 0P5pOT9U ZhDd+cJLLbQrOdEoqaXyUfIOAFG/cUrIDz1kHdMocHD0zRUBw7nxbqaf9/X0dOs2PrLA0x8KgblK0SDIWNGp6M4IOIZ4zV9xXon5qncTgh5Pjtx8TX+9aFyffh4jdMdTN92qVTzjduYMPGqfYa0xzFUclYc7a7pqua6t11+oxoH+rdWm+q7AEYnrzZcYHjewG6AQcxKmCN9TGLFOCGNtv63qSYs6sfSsVVgoGzbijlnQDSsDsQyFBTsH1BdTrw78cEqba+7Zgwkgooznn1guKqweR1qxHJw48YkZB/EiJidfdL51Reuaxms+rCA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.116972, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi there, I'm running a 6.12 kernel with KASAN enabled and it's triggering the WARN in depot_init_pool(): Stack depot reached limit capacity WARNING: CPU: 37 PID: 514186 at lib/stackdepot.c:252 stack_depot_save_flags+0x787/0x840 Has anyone ever discussed increasing the number of stack depot pools or making it configurable? Our workloads do a lot of network processing so the stacks can get quite deep and varied and we can definitely spare more than the 128MiB currently allocated for stacks in the name of better KASAN testing. Thanks, Matt