diff mbox series

[bpf-next,v2,06/10] bpf: Bump MAX_BPF_STACK size to 768 bytes

Message ID 20210914123750.460750-7-memxor@gmail.com (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series Support kernel module function calls from eBPF | expand

Checks

Context Check Description
bpf/vmtest-bpf-next fail VM_Test
bpf/vmtest-bpf-next-PR fail PR summary
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count success Link
netdev/tree_selection success Clearly marked for bpf-next
netdev/subject_prefix success Link
netdev/cc_maintainers warning 2 maintainers not CCed: john.fastabend@gmail.com kpsingh@kernel.org
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 3346 this patch: 3346
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 10 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 3433 this patch: 3433
netdev/header_inline success Link

Commit Message

Kumar Kartikeya Dwivedi Sept. 14, 2021, 12:37 p.m. UTC
Increase the maximum stack size accessible to BPF program to 768 bytes.
This is done so that gen_loader can use 94 additional fds for kfunc BTFs
that it passes in to fd_array from the remaining space available for the
loader_stack struct to expand.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
---
 include/linux/filter.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/include/linux/filter.h b/include/linux/filter.h
index 4a93c12543ee..b214189ece62 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -82,8 +82,8 @@  struct ctl_table_header;
  */
 #define BPF_SYM_ELF_TYPE	't'
 
-/* BPF program can access up to 512 bytes of stack space. */
-#define MAX_BPF_STACK	512
+/* BPF program can access up to 768 bytes of stack space. */
+#define MAX_BPF_STACK	768
 
 /* Helper macros for filter block array initializers. */