Before:

[acme@five pahole]$ git log --oneline -4
25753e0396abea25 pfunct: Use load stealer to speed up --class
aa8fb8c091446467 man-pages: Add entry for -J/--btf_encode to pahole's man page
ace05ba9414c1fe4 btf: Add support for split BTF loading and encoding
7290d08b4a6e5876 libbpf: Update libbpf submodule reference to latest master
[acme@five pahole]$

[acme@five pahole]$ pahole -J vmlinux 
[acme@five pahole]$ pfunct -F btf vmlinux | sort > before.pfunct
[acme@five pahole]$ bpftool btf dump file ./vmlinux | grep 'FUNC '| head
[1163] FUNC 'vc_no_ghcb' type_id=89 linkage=static
[1164] FUNC 'vc_boot_ghcb' type_id=89 linkage=static
[1165] FUNC 'x86_early_init_platform_quirks' type_id=89 linkage=static
[1166] FUNC '__read_overflow2' type_id=89 linkage=static
[1168] FUNC 'clear_page_erms' type_id=1167 linkage=static
[1169] FUNC 'clear_page_rep' type_id=1167 linkage=static
[1170] FUNC 'clear_page_orig' type_id=1167 linkage=static
[1171] FUNC 'idt_setup_early_handler' type_id=89 linkage=static
[1173] FUNC 'early_fixup_exception' type_id=1172 linkage=static
[1175] FUNC 'handle_vc_boot_ghcb' type_id=1174 linkage=static
[acme@five pahole]$ bpftool btf dump file ./vmlinux | grep 'FUNC '| cut -d\' -f2 | head
vc_no_ghcb
vc_boot_ghcb
x86_early_init_platform_quirks
__read_overflow2
clear_page_erms
clear_page_rep
clear_page_orig
idt_setup_early_handler
early_fixup_exception
handle_vc_boot_ghcb
[acme@five pahole]$ bpftool btf dump file ./vmlinux | grep 'FUNC '| cut -d\' -f2 | sort > before.bpftool
[acme@five pahole]$ head before.pfunct
abort
abort_creds
abort_creds
__absent_pages_in_range
__absent_pages_in_range
absent_pages_in_range
ac6_proc_exit
ac6_proc_init
access_process_vm
__access_remote_vm
[acme@five pahole]$ head before.bpftool 
abort
abort_creds
abort_creds
__absent_pages_in_range
__absent_pages_in_range
absent_pages_in_range
ac6_proc_exit
ac6_proc_init
access_process_vm
__access_remote_vm
[acme@five pahole]$
[acme@five pahole]$ wc -l before.pfunct 
28829 before.pfunct
[acme@five pahole]$ wc -l before.bpftool 
28829 before.bpftool
[acme@five pahole]$


After:

[acme@five pahole]$ git log --oneline -6
8156bec8aedb685b (HEAD -> master) btf_encoder: Fix function generation
d0cd007339ee509e btf_encoder: Generate also .init functions
25753e0396abea25 pfunct: Use load stealer to speed up --class
aa8fb8c091446467 man-pages: Add entry for -J/--btf_encode to pahole's man page
ace05ba9414c1fe4 btf: Add support for split BTF loading and encoding
7290d08b4a6e5876 libbpf: Update libbpf submodule reference to latest master
[acme@five pahole]$

[acme@five pahole]$ pahole -J vmlinux 
[acme@five pahole]$ pfunct -F btf vmlinux | sort > after.pfunct
[acme@five pahole]$ bpftool btf dump file ./vmlinux | grep 'FUNC '| cut -d\' -f2 | sort > after.bpftool
[acme@five pahole]$ 

[acme@five pahole]$ diff -u before.pfunct  before.bpftool 
[acme@five pahole]$ 
[acme@five pahole]$ diff -u after.pfunct after.bpftool 
[acme@five pahole]$

[acme@five pahole]$ diff -u after.pfunct after.bpftool 
[acme@five pahole]$ wc -l before.pfunct 
28829 before.pfunct
[acme@five pahole]$ wc -l after.pfunct 
41030 after.pfunct
[acme@five pahole]$ 

Which is interesting, because with these patches we don't have dups in function names:

[acme@five pahole]$ sort after.bpftool | uniq -c | sort -nr | head
      1 zs_zpool_unmap
      1 zs_zpool_total_size
      1 zs_zpool_map
      1 zs_zpool_malloc
      1 zs_zpool_free
      1 zs_zpool_destroy
      1 zs_zpool_create
      1 zswap_zpool_param_set
      1 zswap_writeback_entry
      1 __zswap_pool_release
[acme@five pahole]$

While before we had:

[acme@five pahole]$ sort before.bpftool | uniq -c | sort -nr | head
      3 __x64_sys_userfaultfd
      3 __x64_sys_timerfd_settime
      3 __x64_sys_timerfd_gettime
      3 __x64_sys_timerfd_create
      3 __x64_sys_syslog
      3 __x64_sys_sysfs
      3 __x64_sys_swapon
      3 __x64_sys_swapoff
      3 __x64_sys_socketpair
      3 __x64_sys_socket
[acme@five pahole]$ 

The increase is due to the inclusion of static variables, for instance:

[acme@five pahole]$ diff -u before.bpftool after.bpftool  | tail
+__zswap_pool_release
+zswap_writeback_entry
+zswap_zpool_param_set
+zs_zpool_create
+zs_zpool_destroy
+zs_zpool_free
+zs_zpool_malloc
+zs_zpool_map
+zs_zpool_total_size
+zs_zpool_unmap
[acme@five pahole]$


static void zs_zpool_unmap(void *pool, unsigned long handle)