[lkml]   [2007]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [Bug 8040] Hang before INIT when CONFIG HIGHMEM4G=y [Fix CONFIG COMPAT VDSO] <- Bad
Leroy van Logchem <leroy.vanlogchem <at>> writes:

> > > None whatsoever. Three people are reporting this and it's a drop-dead
> > > showstopper for a 2.6.21 release so we just have to wait until someone
> > > wakes up and thinks about it.
> The topic should be "when CONFIG_HIGHMEM64G=y" imo.
> I'll try to do my first bi-sect today.

Bisecting went well, after 13 compiles this commit was found:

a1f3bb9ae4497a2ed3eac773fd7798ac33a0371f is first bad commit
commit a1f3bb9ae4497a2ed3eac773fd7798ac33a0371f
Author: Roland McGrath <>
Date: Fri Jan 26 00:56:46 2007 -0800


I wouldn't mind if CONFIG_COMPAT_VDSO went away entirely. But if it's there,
it should work properly. Currently it's quite haphazard: both real vma and
fixmap are mapped, both are put in the two different AT_* slots, sysenter
returns to the vma address rather than the fixmap address, and core dumps yet
are another story.

This patch makes CONFIG_COMPAT_VDSO disable the real vma and use the fixmap
area consistently. This makes it actually compatible with what the old vdso
implementation did.

Signed-off-by: Roland McGrath <>
Cc: Ingo Molnar <>
Cc: Paul Mackerras <>
Cc: Benjamin Herrenschmidt <>
Cc: Andi Kleen <>
Signed-off-by: Andrew Morton <>
Signed-off-by: Linus Torvalds <>

:040000 040000 802ab3366a651ecba28c8677fa84a9f7c506392b
f44adc4dcdab733e5965b68ccd0d643f0a550a80 M arch
:040000 040000 be1e217152d8b3fcd05f09aa2b3f4f9dcb8208aa
46cc86427e861350dd3fef9469474c55119f27ce M include

I had both CONFIG_COMPAT_VDSO=y and CONFIG_HIGHMEM64G=y configured.
Using a 4GB Supermicro 7044 SMP dual Xeon. Details upon request.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-03-14 18:55    [W:0.097 / U:4.192 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site