Subject: Re: bug#66288: 29.1; Performance regression using pipe for subprocess

From: Dmitry Gutov <[email-masked]>
Date: Thu, 5 Oct 2023 01:54:43 +0300

On 05/10/2023 01:49, Paul Eggert wrote:
>> +      fcntl (inchannel, F_SETPIPE_SZ, readmax);
> 
> This call can fail if you aren't root and you exceed the system limit in 
> /proc/sys/fs/pipe-max-size. So I suggest that if this fnctl fails with 
> EPERM, trying it again after clipping to that limit.

Perhaps we'd rather fail loudly, so the user is aware that their 
customized value cannot be applied.