git: a44c11974c82 - main - loopback: set MTU to IF_MAXMTU

The branch main has been updated by glebius:

URL: https://cgit.FreeBSD.org/src/commit/?id=a44c11974c82a01c767a33332177a39fd65616fe

commit a44c11974c82a01c767a33332177a39fd65616fe
Author:     Gleb Smirnoff <glebius@FreeBSD.org>
AuthorDate: 2026-10-16 21:08:36 +0000
Commit:     Gleb Smirnoff <glebius@FreeBSD.org>
CommitDate: 2026-10-16 21:08:36 +0000

    loopback: set MTU to IF_MAXMTU
    
    It was temporarily reduced in af78195e0024 in 1994 to hide some bugs with
    signed short overflow.  We believe all these bugs were sorted out by
    today. :)
    
    Note that earlier ba582a82b0e36 reduced the MTU be rounded to a longword
    with a reference "NFS likes it to be rounded".  We have had several
    refactors of the NFS code since that.
    
    Reviewed by:            pouria, zlei, tuexen
    Differential Revision:  https://reviews.freebsd.org/D59450
---
 sys/net/if_loop.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/sys/net/if_loop.c b/sys/net/if_loop.c
index 647dbe79e229..9231ec6dab85 100644
--- a/sys/net/if_loop.c
+++ b/sys/net/if_loop.c
@@ -73,14 +73,6 @@
 
 #include <security/mac/mac_framework.h>
 
-#ifdef TINY_LOMTU
-#define	LOMTU	(1024+512)
-#elif defined(LARGE_LOMTU)
-#define LOMTU	131072
-#else
-#define LOMTU	16384
-#endif
-
 #define	LO_CSUM_FEATURES	(CSUM_IP | CSUM_IP_TCP | CSUM_IP_UDP | \
 				    CSUM_IP_SCTP)
 #define	LO_CSUM_FEATURES6	(CSUM_IP6_TCP | CSUM_IP6_UDP | CSUM_IP6_SCTP)
@@ -123,7 +115,7 @@ lo_clone_create(struct if_clone *ifc, char *name, size_t len,
 
 	ifp = if_alloc(IFT_LOOP);
 	if_initname(ifp, loname, ifd->unit);
-	ifp->if_mtu = LOMTU;
+	ifp->if_mtu = IF_MAXMTU;
 	ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
 	ifp->if_ioctl = loioctl;
 	ifp->if_output = looutput;