[Bug 208154] please increase ARG_MAX

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208154

Thierry Thomas  changed:

   What|Removed |Added

   See Also||https://bugs.freebsd.org/bu
   ||gzilla/show_bug.cgi?id=2417
   ||10

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[Bug 208154] please increase ARG_MAX

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208154

Pedro F. Giffuni  changed:

   What|Removed |Added

 Resolution|--- |Unable to Reproduce
 Status|New |Closed

--- Comment #9 from Pedro F. Giffuni  ---
(In reply to Jon Boden from comment #8)

Sorry for the late reply ...

More than not enabling mergelibs, you have to explicitly disable it. 
Our LibreOffice port does that:

https://svnweb.freebsd.org/ports/head/editors/libreoffice/Makefile?revision=416875=markup#l219

Not sure how Debian does but I suspect they also have it building.

I can't really justify changing the FreeBSD value for one port where
we manage to workaround the issue.

I will close the issue for now but it is a good reference for the future.
Thanks for testing!

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[Bug 208154] please increase ARG_MAX

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208154

--- Comment #8 from Jon Boden  ---
Created attachment 168767
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=168767=edit
LibreOffice build failure

Hi

The result of my test: increasing it to 1048320 as Pedro suggested is enough to
make LibreOffice build succeed.

Note: Removing --enable-mergelibs does NOT work around the problem. The only
way I managed to build LibreOffice (Ubuntu version 1:5.0.2-0ubuntu1) is by
increasing ARG_MAX.

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[Bug 208154] please increase ARG_MAX

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--- Comment #5 from Jon Boden  ---
(In reply to Konstantin Belousov from comment #3)

So it could be increased on 64-bit architectures only?

P.S. I'm preparing the test with 1048320 as requested by Pedro

P.P.S. Btw we've been running a heavy load amd64 system (builder machine) with
the initial patch for months and haven't found stability issues so far.

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[Bug 208154] please increase ARG_MAX

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Konstantin Belousov  changed:

   What|Removed |Added

 CC||a...@freebsd.org,
   ||k...@freebsd.org

--- Comment #3 from Konstantin Belousov  ---
ARG_MAX sizes the exec_map submap, the current formula is 16 *
round_page(PATH_MAX + ARG_MAX).  Increasing ARG_MAX would consume (much) more
KVA on KVA-starved architectures, basically all 32bits, esp. PAE-like configs.

I believe that this was discussed at least once, with Andrey (?).

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[Bug 208154] please increase ARG_MAX

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208154

--- Comment #2 from Pedro F. Giffuni  ---
For reference, here are some values in other systems:

/netbsd/sys/sys/syslimits.h
#define ARG_MAX (256 * 1024) /* max bytes for an exec function */ 

/illumos-gate/usr/src/head/limits.h
#define _ARG_MAX32  1048320 /* max length of args to exec 32-bit program */
#define _ARG_MAX64  2096640 /* max length of args to exec 64-bit program */
#ifdef  _LP64
#define ARG_MAX _ARG_MAX64  /* max length of arguments to exec */
#else   /* _LP64 */
#define ARG_MAX _ARG_MAX32  /* max length of arguments to exec */
#endif  /* _LP64 */



I have no opinion, but since our own LibreOffice builds haven't seem to have
reached that issue(?), perhaps it's better to avoid a huge bump in that value.
Perhaps the _ARG_MAX32 is sufficient for UbuntuBSD? (Cool project BTW).

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[Bug 208154] please increase ARG_MAX

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--- Comment #1 from Jon Boden  ---
Just for reference, the one from Linux is:

$ getconf ARG_MAX
2097152

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