linux-kernel - Re: data loss when doing ls-remote and piped to command

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Message-ID: <9bd95c0ad91bd490adf2b6e57495411a0f72fe50.camel@gmx.de>
Date:   Sat, 18 Sep 2021 08:33:38 +0200
From:   Mike Galbraith <efault@....de>
To:     Rolf Eike Beer <eb@...ix.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Junio C Hamano <gitster@...ox.com>
Cc:     Git List Mailing <git@...r.kernel.org>,
        Tobias Ulmer <tu@...ix.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: data loss when doing ls-remote and piped to command

On Fri, 2021-09-17 at 08:59 +0200, Rolf Eike Beer wrote:
>
> What you need is a _fast_ git server. kernel.org or github.com seem to be too
> slow for this if you don't sit somewhere in their datacenter. Use something in
> your local network, a Xeon E5 with lot's of RAM and connected with 1GBit/s
> Ethernet in my case.

Even faster: what's coming across that wire should be a constant (is?),
variable is only delivery/consumption jitter.  If there's really really
a pipe problem lurking, you should also be able to trigger by saving
the data once, and just catting it, letting interrupts etc provide
jitter.  Which stdout is left of '|' in a script shouldn't matter one
whit to the interpreter/kernel conversation, they're all the same.

That said, if I had a reproducer I was confident pointed to the kernel,
I'd try to bisect.. boring as hell, but highly effective.

	-Mike