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Re: PCH merge: bootstrap failure, gengtype consumes all file descriptors

From: Geoff Keating <geoffk at geoffk dot org>
To: ghazi at caip dot rutgers dot edu
Cc: gcc-bugs at gcc dot gnu dot org, gcc at gcc dot gnu dot org
Date: Mon, 10 Jun 2002 20:01:13 -0700
Subject: Re: PCH merge: bootstrap failure, gengtype consumes all file descriptors
References: <200206102044.QAA16742@caip.rutgers.edu> <200206102117.g5ALH8W04876@desire.geoffk.org> <200206110240.WAA19357@caip.rutgers.edu>
Reply-to: Geoff Keating <geoffk at redhat dot com>

> Date: Mon, 10 Jun 2002 22:40:55 -0400 (EDT)
> From: "Kaveh R. Ghazi" <ghazi@caip.rutgers.edu>

> IMHO its system programming 101 that says don't open tons of FDs
> simultaneously.  Instead do your processing one FD (file) at a time.

All that work to save a few small kernel data structures...

> Can gengtype.c be changed so that we operate on only one of its output
> files at a time so as not to consume so many file descriptors?

It's possible but not easy.  Probably the easiest thing would be to
close and re-open the temporary files during processing.  Of course,
that requires knowing their names...

Care to suggest a patch?

-- 
- Geoffrey Keating <geoffk@geoffk.org> <geoffk@redhat.com>

Follow-Ups:
- Re: PCH merge: bootstrap failure, gengtype consumes all file descriptors
  - From: Zack Weinberg

References:
- PCH merge: bootstrap failure, gengtype consumes all file descriptors
  - From: Kaveh R. Ghazi
- Re: PCH merge: bootstrap failure, gengtype consumes all file descriptors
  - From: Geoff Keating
- Re: PCH merge: bootstrap failure, gengtype consumes all file descriptors
  - From: Kaveh R. Ghazi

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