Re: Git 2.54.0-rc1, subtests of t5310, t5326, t5327

> On April 8, 2026 1:40 PM, Jeff King wrote:
> >On Wed, Apr 08, 2026 at 12:25:47PM -0400, rsbecker@nexbridge.com wrote:
> >
> >> This is also impacting t5608 and t7700. Anywhere where writev() is
> >> used, seemingly. We went through MAX_IO_SIZE issues years ago, instead
> >> of using ssize_t as a basis of how big communication is. I think
> >> writev() is not valid. It worked on Lunix, but had issues elsewhere.
> >> This broke the compat layer.
> >
> >I wondered briefly if the problem could be that we're violating MAX_IO_SIZE here,
> >as our use of writev() does not respect it at all. But the only spot that uses it is
> >feeding pkt-line packets, which max out at 64k. So unless your MAX_IO_SIZE is
> >smaller than that, I doubt that is the problem.
> 
> SSIZE_MAX on platform is 53248, so yes. We expected git-compat-util.h at line
> 696 to be honoured.