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* RE: Does e2fsprogs-1.26 work on mips?
@ 2002-03-25 19:00 Peter Hartley
  2002-03-25 19:11 ` H . J . Lu
  0 siblings, 1 reply; 13+ messages in thread
From: Peter Hartley @ 2002-03-25 19:00 UTC (permalink / raw)
  To: linux-mips, linux kernel, GNU C Library

H J Lu wrote:
> What are you talking about? It doesn't matter which kernel header
> is used. glibc doesn't even use /usr/include/asm/resource.h nor
> should any user space applications.

It's not about /usr/include/asm/resource.h, it's about
/usr/include/asm/unistd.h, where the syscall numbers are defined.

This is presumably what the "#ifdef __NR_ugetrlimit" in
sysdeps/unix/sysv/linux/i386/getrlimit.c is meant to be testing against --
nothing in the glibc-2.2.5 distribution itself defines that symbol. Surely a
Linux glibc doesn't compile without the target system's linux/* and asm/*
headers?

2.4's /usr/include/asm/unistd.h defines __NR_ugetrlimit but 2.2's doesn't.

	Peter

^ permalink raw reply	[flat|nested] 13+ messages in thread
* RE: Does e2fsprogs-1.26 work on mips?
@ 2002-03-25 10:52 Peter Hartley
  2002-03-25 17:07 ` H . J . Lu
  0 siblings, 1 reply; 13+ messages in thread
From: Peter Hartley @ 2002-03-25 10:52 UTC (permalink / raw)
  To: 'H . J . Lu', Andrew Morton
  Cc: tytso, linux-mips, linux kernel, GNU C Library

H J Lu wrote:
> I look at the glibc code. It uses a constant RLIM_INFINITY for a given
> arch. The user always passes (~0UL) to glibc on x86. glibc will check
> if the kernel supports the new getrlimit at the run time. If it
> doesn't, glibc will adjust the RLIM_INFINITY for setrlimit. I 
> don't see
> how glibc 2.2.5 compiled under kernel 2.2 will fail under 2.4 due to
> this unless glibc is misconfigureed or miscompiled.

It's not a question of which kernel glibc is compiled under, it's a question
of which version of the kernel headers (/usr/include/{linux,asm}) glibc is
compiled against.

A glibc, even the newest glibc, *compiled against 2.2 headers* cannot know
about the new getrlimit, so the run-time test cannot be compiled and is not
used. Such a glibc subsequently breaks fsck if run under a 2.4 kernel.

Recompile your glibc against 2.4 headers and you should get a glibc and fsck
that work if run under either a 2.2 or 2.4 kernel.

The necessary kernel patch to fix this mess is in the latest -pre-ac (thanks
Alan).

	Peter

^ permalink raw reply	[flat|nested] 13+ messages in thread
[parent not found: <20020323140728.A4306@lucon.org>]

end of thread, other threads:[~2002-03-26 11:06 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2002-03-25 19:00 Does e2fsprogs-1.26 work on mips? Peter Hartley
2002-03-25 19:11 ` H . J . Lu
2002-03-25 19:45   ` PATCH: Support __NR_ugetrlimit for 2.2 kernel (Re: Does e2fsprogs-1.26 work on mips?) H . J . Lu
2002-03-25 20:01     ` Daniel Jacobowitz
2002-03-25 20:39       ` H . J . Lu
  -- strict thread matches above, loose matches on Subject: below --
2002-03-25 10:52 Does e2fsprogs-1.26 work on mips? Peter Hartley
2002-03-25 17:07 ` H . J . Lu
     [not found] <20020323140728.A4306@lucon.org>
     [not found] ` <3C9D1C1D.E30B9B4B@zip.com.au>
     [not found]   ` <20020323221627.A10953@lucon.org>
     [not found]     ` <3C9D7A42.B106C62D@zip.com.au>
2002-03-24  9:28       ` H . J . Lu
2002-03-25  5:31         ` Theodore Tso
2002-03-25  5:43           ` Andrew Morton
2002-03-26  6:54             ` Theodore Tso
2002-03-26 10:51               ` Paul Mackerras
2002-03-25 17:17           ` H . J . Lu

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