From: jmk@plan9.bell-labs.com jmk@plan9.bell-labs.com
Subject: [9fans] Find command
Date: Thu, 3 Sep 1998 10:23:10 -0400 [thread overview]
Message-ID: <19980903142310.vQwl_UZ9BX0i8_CJnoJ3doaHUPz7ZBXepAWxwbqVWQo@z> (raw)
in plan9, TSTKSIZ on the x86 is rather small (10) and located awkwardly in
the address space - you can't increase it without also moving the location of
the user stack and there are some places this value is known (e.g. the alef
runtime):
#define USERADDR 0xC0000000 /* struct User */
#define TSTKTOP USERADDR /* end of new stack in sysexec */
#define TSTKSIZ 10
#define USTKTOP (TSTKTOP-TSTKSIZ*BY2PG) /* byte just beyond user stack */
although i don't remember all the details, in order to increase
it a couple of years ago in brazil i moved things around a bit more:
#define KZERO 0x80000000 /* base of kernel address space */
#define USTKTOP (KZERO-BY2PG) /* byte just beyond user stack */
#define TSTKTOP (USTKTOP-USTKSIZE) /* end of new stack in sysexec */
#define TSTKSIZ 100
this was fun as we were running a user-level ip implementation written in alef
at the time.
--jim
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From: forsyth@caldo.demon.co.uk
Message-Id: <199809030720.DAA10849@cse.psu.edu>
To: 9fans@cse.psu.edu
Date: Thu, 3 Sep 1998 08:19:56 BST
Subject: Re: [9fans] Find command
Sender: owner-9fans@cse.psu.edu
Reply-To: 9fans@cse.psu.edu
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>>The only limit on arglist size in plan 9 is
>>total virtual memory available.
it's limited to TSTKSIZ*BY2PG during the transfer between images,
but it would be better to remove the restriction than to reinstate xargs.
next reply other threads:[~1998-09-03 14:23 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-09-03 14:23 jmk [this message]
-- strict thread matches above, loose matches on Subject: below --
1998-09-07 12:31 Roger
1998-09-03 7:19 forsyth
1998-09-02 23:20 Tom
1998-09-02 21:20 Scott
1998-09-02 21:02 Tom
1998-09-02 20:35 Ed
1998-09-02 20:33 Tom
1998-09-02 20:30 Russ
1998-09-02 20:28 Russ
1998-09-02 20:18 presotto
1998-09-02 19:44 Franklin
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