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author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-08-30 03:39:15 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-08-30 03:39:15 +0300 |
commit | adfd671676c922bada16477eb68b5eb5f065addc (patch) | |
tree | fb98de5791b9bfabf25cf51fec20a1424efa32a0 /include/net/ipv6.h | |
parent | daa22f5a78c27412e88d31780c4a6262cda559cd (diff) | |
parent | 53f3811dfd5e39507ee3aaea1be09aabce8f9c98 (diff) | |
download | linux-adfd671676c922bada16477eb68b5eb5f065addc.tar.xz |
Merge tag 'sysctl-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux
Pull sysctl updates from Luis Chamberlain:
"Long ago we set out to remove the kitchen sink on kernel/sysctl.c
arrays and placings sysctls to their own sybsystem or file to help
avoid merge conflicts. Matthew Wilcox pointed out though that if we're
going to do that we might as well also *save* space while at it and
try to remove the extra last sysctl entry added at the end of each
array, a sentintel, instead of bloating the kernel by adding a new
sentinel with each array moved.
Doing that was not so trivial, and has required slowing down the moves
of kernel/sysctl.c arrays and measuring the impact on size by each new
move.
The complex part of the effort to help reduce the size of each sysctl
is being done by the patient work of el seƱor Don Joel Granados. A lot
of this is truly painful code refactoring and testing and then trying
to measure the savings of each move and removing the sentinels.
Although Joel already has code which does most of this work,
experience with sysctl moves in the past shows is we need to be
careful due to the slew of odd build failures that are possible due to
the amount of random Kconfig options sysctls use.
To that end Joel's work is split by first addressing the major
housekeeping needed to remove the sentinels, which is part of this
merge request. The rest of the work to actually remove the sentinels
will be done later in future kernel releases.
The preliminary math is showing this will all help reduce the overall
build time size of the kernel and run time memory consumed by the
kernel by about ~64 bytes per array where we are able to remove each
sentinel in the future. That also means there is no more bloating the
kernel with the extra ~64 bytes per array moved as no new sentinels
are created"
* tag 'sysctl-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux:
sysctl: Use ctl_table_size as stopping criteria for list macro
sysctl: SIZE_MAX->ARRAY_SIZE in register_net_sysctl
vrf: Update to register_net_sysctl_sz
networking: Update to register_net_sysctl_sz
netfilter: Update to register_net_sysctl_sz
ax.25: Update to register_net_sysctl_sz
sysctl: Add size to register_net_sysctl function
sysctl: Add size arg to __register_sysctl_init
sysctl: Add size to register_sysctl
sysctl: Add a size arg to __register_sysctl_table
sysctl: Add size argument to init_header
sysctl: Add ctl_table_size to ctl_table_header
sysctl: Use ctl_table_header in list_for_each_table_entry
sysctl: Prefer ctl_table_header in proc_sysctl
Diffstat (limited to 'include/net/ipv6.h')
-rw-r--r-- | include/net/ipv6.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index d40d8238d4c2..0675be0f3fa0 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -1272,7 +1272,9 @@ static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } #ifdef CONFIG_SYSCTL struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); +size_t ipv6_icmp_sysctl_table_size(void); struct ctl_table *ipv6_route_sysctl_init(struct net *net); +size_t ipv6_route_sysctl_table_size(struct net *net); int ipv6_sysctl_register(void); void ipv6_sysctl_unregister(void); #endif |