Re: Issue cloning kernel-doc-zh from HUST mirror

[Weijie Yuan <wy@wyuan.org>]

On Tue, Jun 23, 2026 at 04:51:20PM +0800, Dongliang Mu wrote:
> The curl 52 Empty reply from server error is not a Git or Ubuntu
> compatibility issue. It happens because the kernel-doc-zh repository is
> extremely large, and the HUST mirror server closes the HTTPS connection
> early due to timeout or proxy limits.
> 
> You can try the following commands:
> 
>      1. Shallow clone first (most reliable)
> 
>      git clone --depth 1
>      https://mirrors.hust.edu.cn/git/kernel-doc-zh.git linux
> 
>      Then fetch full history:
> 
>      git fetch --unshallow
> 
> If still failing, increase Git buffer like:
> 
> git config --global http.postBuffer 1073741824
> 
>      Finally, I will contact maintainers of HUST mirror site and try
>      some attempts to resolve this issue.

Thanks, and yes, shallow clone could work:

user@debian:~$ git clone --depth 1 https://mirrors.hust.edu.cn/git/kernel-doc-zh.git linux
Cloning into 'linux'...
remote: Enumerating objects: 93130, done.
remote: Counting objects: 100% (93130/93130), done.
remote: Compressing objects: 100% (90511/90511), done.
remote: Total 93130 (delta 7145), reused 20322 (delta 1615), pack-reused 0
Receiving objects: 100% (93130/93130), 259.15 MiB | 4.71 MiB/s, done.
Resolving deltas: 100% (7145/7145), done.
Updating files: 100% (87897/87897), done.

But:

user@debian:~$ cd linux
user@debian:~/linux$ git fetch --unshallow

(after ~10 minutes or so)

remote: Enumerating objects: 10638034, done.
remote: Counting objects: 100% (10638019/10638019), done.
remote: Compressing objects: 100% (1819658/1819658), done.
error: RPC failed; curl 56 GnuTLS recv error (-9): Error decoding the received TLS packet.
error: 5476 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output

and in a mac (26.5.1) Git 2.54, probably the same:

$ git clone https://mirrors.hust.edu.cn/git/kernel-doc-zh.git linux
Cloning into 'linux'...
remote: Enumerating objects: 11406904, done.
error: RPC failed; curl 18 transfer closed with outstanding read data remaining
error: 7537 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output

after setting http.postBuffer 1073741824 on debian:

user@debian:~/linux$ git config --global http.postBuffer 1073741824
user@debian:~/linux$ git fetch --unshallow
(after ~10 minutes)
remote: Enumerating objects: 10638034, done.
remote: Counting objects: 100% (10638019/10638019), done.
remote: Compressing objects: 100% (1819658/1819658), done.
error: RPC failed; curl 56 GnuTLS recv error (-9): Error decoding the received TLS packet.
error: 5917 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output

Apparently the above is of limited value, as it is straightforward to
reproduce.

> Please use the first git repo:
>
> git clone git://git.kernel.org/pub/scm/linux/kernel/git/alexs/linux.git

The average speed of cloning from git.kernel.org is less than 10 KiB/s
from Chengdu ;-)

But of course, a shallow clone is enough for translation work ;-)

Thanks!