Re: git repack on shallow clone of large repo (linux kernel) hangs at "Enumerating objects"

> > You could try using strace or gdb to see what it's doing.
> > 
> > But as a guess, one thing that sometimes causes a stall near the end of
> > "enumerating objects" is loosening unreachable objects that are
> > currently packed. You told repack to use "-A", which asks to loosen
> > those objects so they aren't lost when the old packs are deleted (as
> > opposed to "-a").
> > 
> 
> I attached two strace logs, one for "git repack -A -d" and one for "git
> repack -a -d".
> 
> For the former, I got following excerpt before I had to SIGINT the process:
> 
> > stat("/opt/git/libexec/git-core/git", {st_mode=S_IFREG|0755, st_size=22096480, ...}) = 0
> > pipe([5, 7])                            = 0
> > openat(AT_FDCWD, "/dev/null", O_RDWR|O_CLOEXEC) = 8
> > fcntl(8, F_GETFD)                       = 0x1 (flags FD_CLOEXEC)
> > fcntl(8, F_SETFD, FD_CLOEXEC)           = 0
> > rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], [], 8) = 0
> > clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7feb5ecbfa10) = 13691
> > rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
> > close(7)                                = 0
> > read(5, "", 8)                          = 0
> > close(5)                                = 0
> > close(8)                                = 0
> > close(4)                                = 0
> > fcntl(3, F_GETFL)                       = 0 (flags O_RDONLY)
> > fstat(3, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
> > read(3, 0x55a540de5250, 4096)           = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
> 
> I thought that in the case of "git repack -A -d", it is stucked at the
> last read() before I ctrl-c'ed to trigger SIGINT.