Menglong Dong c6965316d6 net: tipc: fix FB_MTU eat two pages ... [ Upstream commit 0c6de0c943dbb42831bf7502eb5c007f71e752d2 ] FB_MTU is used in 'tipc_msg_build()' to alloc smaller skb when memory allocation fails, which can avoid unnecessary sending failures. The value of FB_MTU now is 3744, and the data size will be: (3744 + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) + \ SKB_DATA_ALIGN(BUF_HEADROOM + BUF_TAILROOM + 3)) which is larger than one page(4096), and two pages will be allocated. To avoid it, replace '3744' with a calculation: (PAGE_SIZE - SKB_DATA_ALIGN(BUF_OVERHEAD) - \ SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) What's more, alloc_skb_fclone() will call SKB_DATA_ALIGN for data size, and it's not necessary to make alignment for buf_size in tipc_buf_acquire(). So, just remove it. Fixes: 4c94cc2d3d ("tipc: fall back to smaller MTU if allocation of local send skb fails") Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn> Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-07-14 16:56:32 +02:00
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addr.c
addr.h
bcast.c
bcast.h
bearer.c
bearer.h
core.c
core.h
crypto.c
crypto.h
diag.c
discover.c
discover.h
eth_media.c
group.c
group.h
ib_media.c
Kconfig
link.c
link.h
Makefile
monitor.c
monitor.h
msg.c
msg.h
name_distr.c
name_distr.h
name_table.c
name_table.h
net.c
net.h
netlink_compat.c
netlink.c
netlink.h
node.c
node.h
socket.c
socket.h
subscr.c
subscr.h
sysctl.c
topsrv.c
topsrv.h
trace.c
trace.h
udp_media.c
udp_media.h