The patch titled
Subject: scripts/checkstack.pl: dynamic stack growth for aarch64
has been added to the -mm tree. Its filename is
checkstackpl-dynamic-stack-growth-for-aarch64.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/checkstackpl-dynamic-stack-growth-for-aarch64.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/checkstackpl-dynamic-stack-growth-for-aarch64.patch
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------------------------------------------------------
From: Qian Cai <cai@xxxxxx>
Subject: scripts/checkstack.pl: dynamic stack growth for aarch64
This is to track dynamic amount of stack growth for aarch64, so it is
possible to print out offensive functions that may consume too much stack.
For example,
0xffff2000084d1270 try_to_unmap_one [vmlinux]: Dynamic (0xcf0)
0xffff200008538358 migrate_page_move_mapping [vmlinux]: Dynamic (0xc60)
0xffff2000081276c8 copy_process.isra.2 [vmlinux]: Dynamic (0xb20)
0xffff200008424958 show_free_areas [vmlinux]: Dynamic (0xb40)
0xffff200008545178 __split_huge_pmd_locked [vmlinux]: Dynamic (0xb30)
0xffff200008555120 collapse_shmem [vmlinux]: Dynamic (0xbc0)
0xffff20000862e0d0 do_direct_IO [vmlinux]: Dynamic (0xb70)
0xffff200008cc0aa0 md_do_sync [vmlinux]: Dynamic (0xb90)
Link: http://lkml.kernel.org/r/20181208025143.39363-1-cai@xxxxxx
Signed-off-by: Qian Cai <cai@xxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/checkstack.pl | 2 ++
1 file changed, 2 insertions(+)
--- a/scripts/checkstack.pl~checkstackpl-dynamic-stack-growth-for-aarch64
+++ a/scripts/checkstack.pl
@@ -48,7 +48,9 @@ my (@stack, $re, $dre, $x, $xs, $funcre)
$funcre = qr/^$x* <(.*)>:$/;
if ($arch eq 'aarch64') {
#ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp, #-80]!
+ #a110: d11643ff sub sp, sp, #0x590
$re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;
+ $dre = qr/^.*sub.*sp, sp, #(0x$x{1,8})/o;
} elsif ($arch eq 'arm') {
#c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
_
Patches currently in -mm which might be from cai@xxxxxx are
checkstackpl-fix-for-aarch64.patch
checkstackpl-dynamic-stack-growth-for-aarch64.patch
