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Mon, 17 Apr 2023 05:15:56 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20230417051556epsmtrp1d10d23c1a487a9e1e6a9cd71c13f65d7~WoQW4Y6Dl0874208742epsmtrp1O; Mon, 17 Apr 2023 05:15:56 +0000 (GMT) X-AuditID: b6c32a45-e13fa700000026e9-82-643cd60dbb9a Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 85.B9.08279.C06DC346; Mon, 17 Apr 2023 14:15:56 +0900 (KST) Received: from rack03.dsn.sec.samsung.com (unknown [10.229.95.126]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20230417051556epsmtip2575acc0a257b0c53fe99034ea3aa21eb~WoQWs50hb0214102141epsmtip2J; Mon, 17 Apr 2023 05:15:56 +0000 (GMT) From: SEO HOYOUNG To: andreyknvl@gmail.com, osalvador@suse.de, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, vbabka@suse.cz, edumazet@google.com, longman@redhat.com, surenb@google.com, elver@google.com, glider@google.com, dvyukov@google.com Cc: SEO HOYOUNG Subject: [PATCH v1] lib/stackdepot: limit nr_entries size Date: Mon, 17 Apr 2023 14:16:37 +0900 Message-Id: <20230417051637.103964-1-hy50.seo@samsung.com> X-Mailer: git-send-email 2.26.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrCJsWRmVeSWpSXmKPExsWy7bCmqS7vNZsUgzd72CzmrF/DZvF94nR2 iwkP29gtnh57xG7RdmY7q0X7x73MFqsXP2CxuLxrDpvFvTX/WS1OHzvBYnG/z8HizLQii8mX FrBZzG7sY3Tg89g56y67x4JNpR6bPk1i9zgx4zeLx/t9V9k8+rasYvRYv+Uqi8eZBUfYPTaf rvb4vEkugCsq2yYjNTEltUghNS85PyUzL91WyTs43jne1MzAUNfQ0sJcSSEvMTfVVsnFJ0DX LTMH6HwlhbLEnFKgUEBicbGSvp1NUX5pSapCRn5xia1SakFKToF5gV5xYm5xaV66Xl5qiZWh gYGRKVBhQnbG4sflBXPtKiZOXcPawHjZvIuRk0NCwERi2b+FjF2MXBxCAjsYJda17GKHcD4x Smx9/5gZwvnGKDFtfy9QGQdYy4OF3BDxvYwSMxtbWCCcH4wSt1btZgKZyyagIbHm2CEmkISI wBQmiU1fzrODJJgF1CQ+313GAmILC1hKTHt8kBnEZhFQlVi+/T2YzStgJXHt0x52iAPlJRY1 /GaCiAtKnJz5hAVijrxE89bZYOdJCCzlkDj4dBEzRIOLxOqrz6FsYYlXx7dADZKSeNnfBmVn SzTuWQtlV0jM3TyZEcI2lpj1rB3sTWYBTYn1u/QhPlaWOHILai2fRMfhv+wQYV6JjjYhiEYl iTNzb0OFJSQOzs6BCHtIXPtyiwkkLCQQK/Fpr/YERvlZSF6ZheSVWQhbFzAyr2IUSy0ozk1P LTYqMITHaHJ+7iZGcPLVct3BOPntB71DjEwcjIcYJTiYlUR4z7hapQjxpiRWVqUW5ccXleak Fh9iNAUG7kRmKdHkfGD6zyuJNzSxNDAxMzM0NzI1MFcS55W2PZksJJCeWJKanZpakFoE08fE wSnVwFRvJ+79TP8mz5wNzH1zT15gjl1WFbYwfs+Xi5N3fOz96nzr4IQW5QuCGd5eC2KY36ev 62Z9qB0pe4Vt/kVxBYO+EOOrCWIB7PbKK179YEhdKH71StYmzhvPziflb9p/zMjh97+HXdPn ce+ez7q+9NAVI/M73jKiahsVLx8uuxp5VeLgq33aSjzPl8xI/j51QdmrsovTj+jOOqk8WTyM 74vQnRRWkSVcqa83p6tN5CkMULt6TP/UmbOlslfKJlfUC9/4zPf/wfny1FO6T57LTNxy6z23 0yu9RKEL3/9w1ftzuTB+bJkbeMVf4Xnon47EbcKK5SKbTkhMdLCwm/px0fkWEaNMNSHGEq4S s57OPlElluKMREMt5qLiRACpp6O2RwQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrGLMWRmVeSWpSXmKPExsWy7bCSvC7PNZsUg0V3dC3mrF/DZvF94nR2 iwkP29gtnh57xG7RdmY7q0X7x73MFqsXP2CxuLxrDpvFvTX/WS1OHzvBYnG/z8HizLQii8mX FrBZzG7sY3Tg89g56y67x4JNpR6bPk1i9zgx4zeLx/t9V9k8+rasYvRYv+Uqi8eZBUfYPTaf rvb4vEkugCuKyyYlNSezLLVI3y6BK2Px4/KCuXYVE6euYW1gvGzexcjBISFgIvFgIXcXIxeH kMBuRoklz5+ydjFyAsUlJP4vbmKCsIUl7rccYYUo+sYosf/iVWaQBJuAhsSaY4eYQBIiAsuY JHavvsAIkmAWUJP4fHcZC4gtLGApMe3xQbAGFgFVieXb34PZvAJWEtc+7WGH2CAvsajhNxNE XFDi5MwnLBBz5CWat85mnsDINwtJahaS1AJGplWMkqkFxbnpucWGBYZ5qeV6xYm5xaV56XrJ +bmbGMFRoaW5g3H7qg96hxiZOBgPMUpwMCuJ8J5xtUoR4k1JrKxKLcqPLyrNSS0+xCjNwaIk znuh62S8kEB6YklqdmpqQWoRTJaJg1OqgWnhjIXfZh4QErDKLq387+kyaeKZJyHFmqElBXN4 OGue9Ol/nnLN1/r8WokberNKZW3XsZzYLKO5dkmNm+yR0xMtYp1czXTrs5lLt65xidihcJdh 5+Irx9sX+wW/mKW58vi5Y8xr1y10/s4QrMu6cXM6+8lbrhz7f099Jfb5sePrA0kbDULkW2SW r39cdWiioF+qyQE7m4dJ05ZtLPG5umLanV2btYtztKadFhBZONt7w7WLkzZyfHwjp9z6oOvx Sx/L/DvKeuXXzyWq/TKJ9Vvs4mbf3/km9t+BeUceOCjtZNNauP7Vpg0pXG//qnrxHNmruPiz WZvvBcGMkkUZNtE73kivv39E3yeuXEjk5d52JZbijERDLeai4kQA56N4ovkCAAA= X-CMS-MailID: 20230417051556epcas2p25b57d681bfae498b30ff33f0a96033d6 X-Msg-Generator: CA Content-Type: text/plain; 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If this continues to happen, depot_alloc_stack() will continue to exceed STACK_ALLOC_SIZE and STACK_ALLOC_MAX_SLABS, eventually resulting in the warning "Stack depot reached limit capacity". So want to limit the size of entries stored in it. 25 is a test value, and we found that in a normal case, the depth of the stack does not exceed 25. [ 2479.383395]I[0:launcher-loader: 1719] Stack depot reached limit capacity [ 2479.383538]I[0:launcher-loader: 1719] WARNING: CPU: 0 PID: 1719 at lib/stackdepot.c:129 __stack_depot_save+0x464/0x46c [ 2479.385693]I[0:launcher-loader: 1719] pstate: 624000c5 (nZCv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 2479.385724]I[0:launcher-loader: 1719] pc : __stack_depot_save+0x464/0x46c [ 2479.385751]I[0:launcher-loader: 1719] lr : __stack_depot_save+0x460/0x46c [ 2479.385774]I[0:launcher-loader: 1719] sp : ffffffc0080073c0 [ 2479.385793]I[0:launcher-loader: 1719] x29: ffffffc0080073e0 x28: ffffffd00b78a000 x27: 0000000000000000 [ 2479.385839]I[0:launcher-loader: 1719] x26: 000000000004d1dd x25: ffffff891474f000 x24: 00000000ca64d1dd [ 2479.385882]I[0:launcher-loader: 1719] x23: 0000000000000200 x22: 0000000000000220 x21: 0000000000000040 [ 2479.385925]I[0:launcher-loader: 1719] x20: ffffffc008007440 x19: 0000000000000000 x18: 0000000000000000 [ 2479.385969]I[0:launcher-loader: 1719] x17: 2065726568207475 x16: 000000000000005e x15: 2d2d2d2d2d2d2d20 [ 2479.386013]I[0:launcher-loader: 1719] x14: 5d39313731203a72 x13: 00000000002f6b30 x12: 00000000002f6af8 [ 2479.386057]I[0:launcher-loader: 1719] x11: 00000000ffffffff x10: ffffffb90aacf000 x9 : e8a74a6c16008800 [ 2479.386101]I[0:launcher-loader: 1719] x8 : e8a74a6c16008800 x7 : 00000000002f6b30 x6 : 00000000002f6af8 [ 2479.386145]I[0:launcher-loader: 1719] x5 : ffffffc0080070c8 x4 : ffffffd00b192380 x3 : ffffffd0092b313c [ 2479.386189]I[0:launcher-loader: 1719] x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000022 [ 2479.386231]I[0:launcher-loader: 1719] Call trace: [ 2479.386248]I[0:launcher-loader: 1719] __stack_depot_save+0x464/0x46c [ 2479.386273]I[0:launcher-loader: 1719] kasan_save_stack+0x58/0x70 [ 2479.386303]I[0:launcher-loader: 1719] save_stack_info+0x34/0x138 [ 2479.386331]I[0:launcher-loader: 1719] kasan_save_free_info+0x18/0x24 [ 2479.386358]I[0:launcher-loader: 1719] ____kasan_slab_free+0x16c/0x170 [ 2479.386385]I[0:launcher-loader: 1719] __kasan_slab_free+0x10/0x20 [ 2479.386410]I[0:launcher-loader: 1719] kmem_cache_free+0x238/0x53c [ 2479.386435]I[0:launcher-loader: 1719] mempool_free_slab+0x1c/0x28 [ 2479.386460]I[0:launcher-loader: 1719] mempool_free+0x7c/0x1a0 [ 2479.386484]I[0:launcher-loader: 1719] bvec_free+0x34/0x80 [ 2479.386514]I[0:launcher-loader: 1719] bio_free+0x60/0x98 [ 2479.386540]I[0:launcher-loader: 1719] bio_put+0x50/0x21c [ 2479.386567]I[0:launcher-loader: 1719] f2fs_write_end_io+0x4ac/0x4d0 [ 2479.386594]I[0:launcher-loader: 1719] bio_endio+0x2dc/0x300 [ 2479.386622]I[0:launcher-loader: 1719] __dm_io_complete+0x324/0x37c [ 2479.386650]I[0:launcher-loader: 1719] dm_io_dec_pending+0x60/0xa4 [ 2479.386676]I[0:launcher-loader: 1719] clone_endio+0xf8/0x2f0 [ 2479.386700]I[0:launcher-loader: 1719] bio_endio+0x2dc/0x300 [ 2479.386727]I[0:launcher-loader: 1719] blk_update_request+0x258/0x63c [ 2479.386754]I[0:launcher-loader: 1719] scsi_end_request+0x50/0x304 [ 2479.386782]I[0:launcher-loader: 1719] scsi_io_completion+0x88/0x160 [ 2479.386808]I[0:launcher-loader: 1719] scsi_finish_command+0x17c/0x194 [ 2479.386833]I[0:launcher-loader: 1719] scsi_complete+0xcc/0x158 [ 2479.386859]I[0:launcher-loader: 1719] blk_mq_complete_request+0x4c/0x5c [ 2479.386885]I[0:launcher-loader: 1719] scsi_done_internal+0xf4/0x1e0 [ 2479.386910]I[0:launcher-loader: 1719] scsi_done+0x14/0x20 [ 2479.386935]I[0:launcher-loader: 1719] ufshcd_compl_one_cqe+0x578/0x71c [ 2479.386963]I[0:launcher-loader: 1719] ufshcd_mcq_poll_cqe_nolock+0xc8/0x150 [ 2479.386991]I[0:launcher-loader: 1719] ufshcd_intr+0x868/0xc0c [ 2479.387017]I[0:launcher-loader: 1719] __handle_irq_event_percpu+0xd0/0x348 [ 2479.387044]I[0:launcher-loader: 1719] handle_irq_event_percpu+0x24/0x74 [ 2479.387068]I[0:launcher-loader: 1719] handle_irq_event+0x74/0xe0 [ 2479.387091]I[0:launcher-loader: 1719] handle_fasteoi_irq+0x174/0x240 [ 2479.387118]I[0:launcher-loader: 1719] handle_irq_desc+0x7c/0x2c0 [ 2479.387147]I[0:launcher-loader: 1719] generic_handle_domain_irq+0x1c/0x28 [ 2479.387174]I[0:launcher-loader: 1719] gic_handle_irq+0x64/0x158 [ 2479.387204]I[0:launcher-loader: 1719] call_on_irq_stack+0x2c/0x54 [ 2479.387231]I[0:launcher-loader: 1719] do_interrupt_handler+0x70/0xa0 [ 2479.387258]I[0:launcher-loader: 1719] el1_interrupt+0x34/0x68 [ 2479.387283]I[0:launcher-loader: 1719] el1h_64_irq_handler+0x18/0x24 [ 2479.387308]I[0:launcher-loader: 1719] el1h_64_irq+0x68/0x6c [ 2479.387332]I[0:launcher-loader: 1719] blk_attempt_bio_merge+0x8/0x170 [ 2479.387356]I[0:launcher-loader: 1719] blk_mq_attempt_bio_merge+0x78/0x98 [ 2479.387383]I[0:launcher-loader: 1719] blk_mq_submit_bio+0x324/0xa40 [ 2479.387409]I[0:launcher-loader: 1719] __submit_bio+0x104/0x138 [ 2479.387436]I[0:launcher-loader: 1719] submit_bio_noacct_nocheck+0x1d0/0x4a0 [ 2479.387462]I[0:launcher-loader: 1719] submit_bio_noacct+0x618/0x804 [ 2479.387487]I[0:launcher-loader: 1719] submit_bio+0x164/0x180 [ 2479.387511]I[0:launcher-loader: 1719] f2fs_submit_read_bio+0xe4/0x1c4 [ 2479.387537]I[0:launcher-loader: 1719] f2fs_mpage_readpages+0x888/0xa4c [ 2479.387563]I[0:launcher-loader: 1719] f2fs_readahead+0xd4/0x19c [ 2479.387587]I[0:launcher-loader: 1719] read_pages+0xb0/0x4ac [ 2479.387614]I[0:launcher-loader: 1719] page_cache_ra_unbounded+0x238/0x288 [ 2479.387642]I[0:launcher-loader: 1719] do_page_cache_ra+0x60/0x6c [ 2479.387669]I[0:launcher-loader: 1719] page_cache_ra_order+0x318/0x364 [ 2479.387695]I[0:launcher-loader: 1719] ondemand_readahead+0x30c/0x3d8 [ 2479.387722]I[0:launcher-loader: 1719] page_cache_sync_ra+0xb4/0xc8 [ 2479.387749]I[0:launcher-loader: 1719] filemap_read+0x268/0xd24 [ 2479.387777]I[0:launcher-loader: 1719] f2fs_file_read_iter+0x1a0/0x62c [ 2479.387806]I[0:launcher-loader: 1719] vfs_read+0x258/0x34c [ 2479.387831]I[0:launcher-loader: 1719] ksys_pread64+0x8c/0xd0 [ 2479.387857]I[0:launcher-loader: 1719] __arm64_sys_pread64+0x48/0x54 [ 2479.387881]I[0:launcher-loader: 1719] invoke_syscall+0x58/0x158 [ 2479.387909]I[0:launcher-loader: 1719] el0_svc_common+0xf0/0x134 [ 2479.387935]I[0:launcher-loader: 1719] do_el0_svc+0x44/0x114 [ 2479.387961]I[0:launcher-loader: 1719] el0_svc+0x2c/0x80 [ 2479.387985]I[0:launcher-loader: 1719] el0t_64_sync_handler+0x48/0x114 [ 2479.388010]I[0:launcher-loader: 1719] el0t_64_sync+0x190/0x194 [ 2479.388038]I[0:launcher-loader: 1719] Kernel panic - not syncing: kernel: panic_on_warn set ... Signed-off-by: SEO HOYOUNG --- lib/stackdepot.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/stackdepot.c b/lib/stackdepot.c index 2f5aa851834e..f158729598a6 100644 --- a/lib/stackdepot.c +++ b/lib/stackdepot.c @@ -43,6 +43,7 @@ #define DEPOT_MAX_POOLS \ (((1LL << (DEPOT_POOL_INDEX_BITS)) < DEPOT_POOLS_CAP) ? \ (1LL << (DEPOT_POOL_INDEX_BITS)) : DEPOT_POOLS_CAP) +#define DEPO_MAX_DEPTH 25 /* Compact structure that stores a reference to a stack. */ union handle_parts { @@ -375,7 +376,7 @@ depot_stack_handle_t __stack_depot_save(unsigned long *entries, * filter_irq_stacks() to simplify all callers' use of stack depot. */ nr_entries = filter_irq_stacks(entries, nr_entries); - + nr_entries = nr_entries > DEPO_MAX_DEPTH ? DEPO_MAX_DEPTH : nr_entries; if (unlikely(nr_entries == 0) || stack_depot_disabled) goto fast_exit; -- 2.26.0