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net/netlink: Correct the comment on netlink message max cap

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Since commit d35c99ff77 ("netlink: do not enter direct reclaim from
netlink_dump()") the cap is 32KiB.

Signed-off-by: Dmitry Safonov <0x7f454c46@gmail.com>
Link: https://patch.msgid.link/20241113-tcp-md5-diag-prep-v2-5-00a2a7feb1fa@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Dmitry Safonov 2024-11-13 18:46:44 +00:00 committed by Jakub Kicinski
parent 2532390448
commit e51edeaf35
1 changed files with 2 additions and 2 deletions
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4
net/netlink/af_netlink.c
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@ -2264,7 +2264,7 @@ static int netlink_dump(struct sock *sk, bool lock_taken)
goto errout_skb;
/* NLMSG_GOODSIZE is small to avoid high order allocations being
* required, but it makes sense to _attempt_ a 16K bytes allocation
* required, but it makes sense to _attempt_ a 32KiB allocation
* to reduce number of system calls on dump operations, if user
* ever provided a big enough buffer.
*/
@ -2286,7 +2286,7 @@ static int netlink_dump(struct sock *sk, bool lock_taken)
goto errout_skb;
/* Trim skb to allocated size. User is expected to provide buffer as
* large as max(min_dump_alloc, 16KiB (mac_recvmsg_len capped at
* large as max(min_dump_alloc, 32KiB (max_recvmsg_len capped at
* netlink_recvmsg())). dump will pack as many smaller messages as
* could fit within the allocated skb. skb is typically allocated
* with larger space than required (could be as much as near 2x the