On Tue, Apr 26, 2022 at 03:06:52PM +0000, Liam Howlett wrote: > From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> > > Use the maple tree or VMA iterator instead. This is faster and will allow > us to shrink the VMA. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> > Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> > Acked-by: Vlastimil Babka <vbabka@xxxxxxx> This patch crashes my xtensa nommu (kc705-nommu) boot test. Crash and bisect logs attached. I can not revert the patch for cross checks because that results in a compile failure. Note that mps2-an385 boot tests also fail but I was not able to bisect. Guenter --- [ 19.394659] Unable to handle kernel paging request at virtual address 00000048 [ 19.394659] pc = 600d7039, ra = a00d7ed4 [ 19.394840] Oops: sig: 11 [#1] PREEMPT [ 19.394930] CPU: 0 PID: 142 Comm: mount Not tainted 5.18.0-rc4-next-20220428 #1 [ 19.394980] a00: a00d7ed4 6253be00 6b6b6b6b ffffffff 00000001 6254ada0 00000000 6253be20 [ 19.395091] a08: a03b91a8 00000000 6b6b6b6b ffffff00 6b6b6b6b 6235c400 6253be40 6b6b6b6b [ 19.395198] pc: 600d7039, ps: 00060710, depc: 0000001c, excvaddr: 00000048 [ 19.395225] lbeg: 6056536c, lend: 60565377 lcount: ffffffff, sar: 00000009 [ 19.395275] Stack: [ 19.395320] 6b6b6b6b 6235c400 0000001f 6b6b6b6b a0009585 6253be40 6234e020 6235a2e0 [ 19.395349] 00000000 6254ada0 00000000 6253be20 a000e789 6253be80 6234e020 60731424 [ 19.395375] 6234e020 6b6b6b6c 6b6b6b6b 6235c40c 00000000 ffffffff 00000000 00000200 [ 19.395401] 60748f3c 6234e090 00000001 6253be50 a000eee0 6253bea0 6234e020 6254a8a0 [ 19.395426] 00000000 6234e020 6254a8a0 00000000 60005e8c 6253bf00 00000000 6270d6d4 [ 19.395452] 60005e8c 6253bef0 00000000 00000000 6254aca0 00000000 fffff000 00000000 [ 19.395478] 6254b3a0 619a0780 627aff95 627aff9a 60005c19 6253bf00 6253bf00 3fffffff [ 19.395503] 6234e090 00000000 00000000 00000000 60005ba9 6253bf20 6253bf30 00000000 [ 19.395519] Call Trace: [ 19.395577] Disabling lock debugging due to kernel taint [ 19.395714] Fixing recursive fault but reboot is needed! [ 19.395826] BUG: scheduling while atomic: mount/142/0x00000000 [ 19.395871] INFO: lockdep is turned off. [ 19.395904] Modules linked in: [ 19.396000] Preemption disabled at: [ 19.396019] [<00000000>] 0x0 [ 19.396256] CPU: 0 PID: 142 Comm: mount Tainted: G D 5.18.0-rc4-next-20220428 #1 [ 19.396284] Stack: [ 19.396311] 00000100 00000000 6253bbf0 6253bbd0 6074b97c 0000008e 6095915c a057531a [ 19.396339] a00287ab 6253bc10 00000010 60734364 00000000 00000004 6253bbf0 6253bbd0 [ 19.396365] a0578975 6253bc30 00000000 00000000 00000000 00000000 60730cbc 6253bda4 [ 19.396392] a002b770 6253bc50 00000000 6254a8a0 40000000 00000000 00000000 6253bc30 [ 19.396418] a000eece 6253bca0 0000810c 00008000 00000000 00000000 00000001 60915040 [ 19.396444] 00000000 60915020 6253a000 60915040 a000eece 6253bca0 00000000 0000050c [ 19.396471] 608011c0 608015c0 6253a000 6253bc50 a0007f39 6253bcc0 00000003 00000001 [ 19.396497] 0000008e 00060003 00000000 6253bca0 a0008675 6253bce0 00000000 0000ff00 [ 19.396509] Call Trace: [ 19.396520] [<6057535d>] dump_stack+0x9/0x18 [ 19.396556] [<600287ab>] __schedule_bug+0x7f/0xc0 [ 19.396584] [<60578975>] __schedule+0x59/0x764 [ 19.396609] [<6002b770>] do_task_dead+0x4c/0x74 [ 19.396633] [<6000eece>] make_task_dead+0xaa/0xb0 [ 19.396657] [<60007f39>] die+0x9d/0xb4 [ 19.396681] [<60008675>] bad_page_fault+0x61/0xc4 [ 19.396705] [<60008875>] do_page_fault+0x19d/0x1ec [ 19.396729] [<60005ba9>] common_exception+0x7f/0x7f [ 19.396752] [<600d7ed4>] exit_mmap+0x44/0xa8 [ 19.396778] [<60009585>] mmput+0x55/0xec [ 19.396802] [<6000e789>] do_exit+0x279/0x914 [ 19.396825] [<6000eee0>] sys_exit+0xc/0xc [ 19.396849] [<60005e8c>] system_call+0x48/0x60 [ 19.396872] [<60005ba9>] common_exception+0x7f/0x7f --- # bad: [bdc61aad77faf67187525028f1f355eff3849f22] Add linux-next specific files for 20220428 # good: [af2d861d4cd2a4da5137f795ee3509e6f944a25b] Linux 5.18-rc4 git bisect start 'HEAD' 'v5.18-rc4' # good: [a6ffa4aa7e81a54632f3370f4c93fce603160192] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git git bisect good a6ffa4aa7e81a54632f3370f4c93fce603160192 # good: [cd63f17e3bb63006f9f88bf7f5947b8e1601bcd9] Merge branch 'edac-for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras.git git bisect good cd63f17e3bb63006f9f88bf7f5947b8e1601bcd9 # good: [cee7bbed3e5cc089b5c364ac8ad4a186c2a28bb6] Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git git bisect good cee7bbed3e5cc089b5c364ac8ad4a186c2a28bb6 # good: [d5a23156ea99f10b584221893a6a7d6f6554cde8] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git git bisect good d5a23156ea99f10b584221893a6a7d6f6554cde8 # good: [2f1fde90d983bc404503100c9c4bbbf1e191bcf4] selftests: cgroup: fix alloc_anon_noexit() instantly freeing memory git bisect good 2f1fde90d983bc404503100c9c4bbbf1e191bcf4 # good: [fca1db6ff251278c532231552e840c7dc36dfa76] Merge branch 'bitmap-for-next' of https://github.com/norov/linux.git git bisect good fca1db6ff251278c532231552e840c7dc36dfa76 # good: [40b39116fe8e6fb66e3166ea40138eec506dfd91] perf: use VMA iterator git bisect good 40b39116fe8e6fb66e3166ea40138eec506dfd91 # bad: [33ef257872566922df2b6bcfdb5330b2388aef53] Docs/{ABI,admin-guide}/damon: update for fixed virtual address ranges monitoring git bisect bad 33ef257872566922df2b6bcfdb5330b2388aef53 # good: [2d8640f244c1ea6c40acde911d339dabc2ac765d] mm/oom_kill: use maple tree iterators instead of vma linked list git bisect good 2d8640f244c1ea6c40acde911d339dabc2ac765d # bad: [49d281fa016f2906346f1707e5059b6f7674a948] mm/mmap.c: pass in mapping to __vma_link_file() git bisect bad 49d281fa016f2906346f1707e5059b6f7674a948 # bad: [487c2c6d922605aebe6f470e1a458eb1425548db] nommu: remove uses of VMA linked list git bisect bad 487c2c6d922605aebe6f470e1a458eb1425548db # good: [dc4a1ab575a32e454be953f7b1b0222dcd3d47fa] mm/swapfile: use vma iterator instead of vma linked list git bisect good dc4a1ab575a32e454be953f7b1b0222dcd3d47fa # good: [7fffbdd08665ddeeb38768309269fa5b32388c3d] i915: use the VMA iterator git bisect good 7fffbdd08665ddeeb38768309269fa5b32388c3d # first bad commit: [487c2c6d922605aebe6f470e1a458eb1425548db] nommu: remove uses of VMA linked list
