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 jXbvvH0d 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wrote: > >On 1/30/25 5:13 PM, Liam R. Howlett wrote: > >> Do you have KASAN or lock debugging on? > > > >No, I don't. > > > >> Does the issue go away when reverting 8c7904a8cd0df ("maple_tree: i is > >> always less than or equal to mas_end") ? > > > >That commit has not been backported to the kernel version I tried to bui= ld > >(6.12.11, currently the latest stable version). > > > >Good news: I learned that the issue has already been solved in the mainl= ine > >version with commit 5059aa6334fcf ("maple_tree: memset maple_big_node as= a > >whole") and backporting it is the solution. >=20 > Hmm... I tried to reproduce this and found different gcc version may beha= ve > differently. An old version doesn't report warning while a later version = does. >=20 > With GCC 8.2.1, the latest master looks good. Even I use -O3. >=20 > 7004a2e46d16 2025-01-22 Merge tag 'linux_kselftest-nolibc-6.14-rc1' o= f git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest >=20 > But with GCC 11.4.0(I don't have the exact version as yours), the latest > master still get a warning. But the message is a little bit different fro= m > yours: >=20 > lib/maple_tree.c: In function =E2=80=98mas_wr_spanning_store=E2=80=99: > lib/maple_tree.c:3804:1: warning: the frame size of 1040 bytes is large= r than 1024 bytes [-Wframe-larger-than=3D] > 3804 | } > | ^ > lib/maple_tree.c: In function =E2=80=98mas_wr_bnode=E2=80=99: > lib/maple_tree.c:4065:1: warning: the frame size of 1048 bytes is large= r than 1024 bytes [-Wframe-larger-than=3D] > 4065 | } > | ^ >=20 > Then I tried to bisect it. And found similar warning even at the first ma= ple > tree commit 54a611b60590 ("Maple Tree: add new data structure"). Below is= the > warning message: >=20 > lib/maple_tree.c: In function =E2=80=98mas_wr_spanning_store.isra=E2=80= =99: > lib/maple_tree.c:4047:1: warning: the frame size of 1032 bytes is large= r than 1024 bytes [-Wframe-larger-than=3D] > 4047 | } > | ^ > lib/maple_tree.c: In function =E2=80=98mas_wr_bnode=E2=80=99: > lib/maple_tree.c:4325:1: warning: the frame size of 1040 bytes is large= r than 1024 bytes [-Wframe-larger-than=3D] > 4325 | } > | ^ >=20 > Hi, Liam >=20 > Do you have some suggestion on what I can do to help? No, this isn't worth chasing down. The proper fix is to remove the big node, but that's really involved and I'm working on it. Thanks, Liam