uml: physical memory shouldn't include initial stack
PATCH 3/14 uml: physical memory shouldn't include initial stack
From 60a2988aea701a6424809a5432bf068667aac177
The top of physical memory should be below the initial process stack, not the top of the address space, at least for as long as the stack isn't known to the kernel VM system and appropriately reserved.
--- arch/um/kernel/um_arch.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)
arch/um/kernel/um_arch.c +4 -1
@@ -259,6 +259,7 @@ int __init linux_main(int argc, char **argv)unsigned long avail, diff;unsigned long virtmem_size, max_physmem;unsigned int i, add; +unsigned long stack;char * mode;for (i =1 ; i < argc; i++) {
@@ -347,7 +348,9 @@ int __init linux_main(int argc, char **argv) } virtmem_size = physmem_size; - avail =TASK_SIZE - start_vm; + stack = (unsigned long ) argv; + stack &= ~(1024 *1024 -1 ); + avail = stack - start_vm;if (physmem_size > avail) virtmem_size = avail; end_vm = start_vm + virtmem_size;
Signature · 12 lines
1.5.5.1 ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ User-mode-linux-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
patch uml-physical-memory-shouldn-t-include-initial-stack.patch added to 2.6.25-stable tree
This is a note to let you know that we have just queued up the patch titled
Subject: uml: physical memory shouldn't include initial stack
to the 2.6.25-stable tree. Its filename is
uml-physical-memory-shouldn-t-include-initial-stack.patch
A git repo of this tree can be found at
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
From [email protected] Tue Aug 5 13:14:54 2008
From: Jeff Dike <[email protected]>
Date: Tue, 5 Aug 2008 16:14:04 -0400
Subject: uml: physical memory shouldn't include initial stack
To: [email protected]
Cc: LKML <[email protected]>, uml-devel <[email protected]>
Message-ID: <[email protected]>
Content-Disposition: inline
From: Jeff Dike <[email protected]>
commit 60a2988aea701a6424809a5432bf068667aac177 upstream
The top of physical memory should be below the initial process stack, not the top of the address space, at least for as long as the stack isn't known to the kernel VM system and appropriately reserved.
--- arch/um/kernel/um_arch.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
arch/um/kernel/um_arch.c +4 -1
@@ -259,6 +259,7 @@ int __init linux_main(int argc, char **aunsigned long avail, diff;unsigned long virtmem_size, max_physmem;unsigned int i, add; +unsigned long stack;char * mode;for (i =1 ; i < argc; i++) {
@@ -347,7 +348,9 @@ int __init linux_main(int argc, char **a } virtmem_size = physmem_size; - avail =TASK_SIZE - start_vm; + stack = (unsigned long ) argv; + stack &= ~(1024 *1024 -1 ); + avail = stack - start_vm;if (physmem_size > avail) virtmem_size = avail; end_vm = start_vm + virtmem_size;
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.25/uml-fix-build-when-slob-is-enabled.patch queue-2.6.25/uml-fix-bad-ntp-interaction-with-clock.patch queue-2.6.25/uml-physical-memory-shouldn-t-include-initial-stack.patch queue-2.6.25/uml-track-and-make-up-lost-ticks.patch queue-2.6.25/uml-missed-kmalloc-in-pcap_user.c.patch queue-2.6.25/uml-deal-with-host-time-going-backwards.patch queue-2.6.25/uml-deal-with-inaccessible-address-space-start.patch queue-2.6.25/uml-missing-export-of-csum_partial-on-uml-amd64.patch queue-2.6.25/uml-memcpy-export-needs-to-follow-host-declaration.patch queue-2.6.25/uml-stub-needs-to-tolerate-sigwinch.patch queue-2.6.25/uml-work-around-broken-host-ptrace_sysemu.patch queue-2.6.25/uml-fix-gcc-ices-and-unresolved-externs.patch queue-2.6.25/uml-fix-boot-crash.patch
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
_______________________________________________
User-mode-linux-devel mailing list [email protected]
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel