Re: Request for detailed documentation of git pack protocol

From: Andreas Ericsson <ae@op5.se>
Date: May 14, 2009, 15:02 UTC
Message-ID: <4A0C3282.4000101@op5.se>
In-Reply-To: <20090514145724.GE30527@spearce.org>

Shawn O. Pearce wrote:

Show 8 quoted lines

> 
> In loopback mode for local file URIs, it may become an issue.  C Git
> is just getting lucky by the pipe size I think.  Though I thought I
> read somewhere yesterday pipe FIFOs in Linux were being allocated
> at 512 bytes, not one system page.  Of course other systems could
> allocate whatever size they want too, and may allocate something
> below the 2952 minimum, and we'd most likely see a deadlock on them.
>

Linux allocates one page 4096 bytes for a FIFO. 512 is the maximum size guaranteed by POSIX to result in an atomic write.

-- 
Andreas Ericsson                   andreas.ericsson@op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

Register now for Nordic Meet on Nagios, June 3-4 in Stockholm
 http://nordicmeetonnagios.op5.org/

Considering the successes of the wars on alcohol, poverty, drugs and
terror, I think we should give some serious thought to declaring war
on peace.