请教一个 tso/gro 的问题

两台 linux 云主机。 客户端和服务端都禁用了 tso/gro 。

curl -g http://192.168.0.78:8000/a.txt -H 'a:DTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzV\nyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EX\nPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGj\nMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr\n9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDul\ndlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRDTPdIkYK0ljIBYfgMwIcytBwIXv48rrYfO8dgTRSfwKYDEDuldlSVcMVUvr9xkGrf2kGjMPzzuBE3EXPhjlxb4KzVyeP2WIF588vaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaxxxxxxxxxxxxxxxxxxxxxxxxx'

客户端抓包如下：

服务端抓包如下：

问题：客户端 curl 请求已经分成两个包了，但是到了服务端那里还是被合并成一个包。