search for: config_compat_vdso

Hi Andi, Here's a couple of patches to fix up COMPAT_VDSO: The first is a straightforward implementation of Jan's original idea of relocating the VDSO to match its mapped location. Unlike Jan and Zach's version, I changed it to relocate based on the phdrs rather than the sections; the result is pleasantly compact. The second patch takes advantage of the fact that all the

Hi Andi, Here's a couple of patches to fix up COMPAT_VDSO: The first is a straightforward implementation of Jan's original idea of relocating the VDSO to match its mapped location. Unlike Jan and Zach's version, I changed it to relocate based on the phdrs rather than the sections; the result is pleasantly compact. The second patch takes advantage of the fact that all the

...like this!) I agree with the criticism, dislike the snarly comments, and disagree with this patch. VDSO is only a problem if (1) the hypervisor wants to reserve the top virtual address space (CONFIG_PARAVIRT=y), and (2) the glibc is old and can't handle a VDSO mapped anywhere but 0xFFFFE000 (CONFIG_COMPAT_VDSO=y). Now, KVM wants to use CONFIG_PARAVIRT=y but not reserve_top_address(), so we should split the config option. Let's not get too excited because we kept it simple. Patch (untested, but fairly simple) below. BTW, I had a patch to do a runtime test (old glibc causes init to assert, then dis...

...like this!) I agree with the criticism, dislike the snarly comments, and disagree with this patch. VDSO is only a problem if (1) the hypervisor wants to reserve the top virtual address space (CONFIG_PARAVIRT=y), and (2) the glibc is old and can't handle a VDSO mapped anywhere but 0xFFFFE000 (CONFIG_COMPAT_VDSO=y). Now, KVM wants to use CONFIG_PARAVIRT=y but not reserve_top_address(), so we should split the config option. Let's not get too excited because we kept it simple. Patch (untested, but fairly simple) below. BTW, I had a patch to do a runtime test (old glibc causes init to assert, then dis...

...D=3D=3D=3D --- linux-2.6.21.orig/arch/i386/kernel/entry.S 2007-03-06 18:51:33.00000000= 0 -0800 +++ linux-2.6.21/arch/i386/kernel/entry.S 2007-03-15 18:14:11.000000000 -08= 00 @@ -305,16 +305,12 @@ sysenter_past_esp: pushl $(__USER_CS) CFI_ADJUST_CFA_OFFSET 4 /*CFI_REL_OFFSET cs, 0*/ -#ifndef CONFIG_COMPAT_VDSO /* * Push current_thread_info()->sysenter_return to the stack. * A tiny bit of offset fixup is necessary - 4*4 means the 4 words * pushed above; +8 corresponds to copy_thread's esp0 setting. */ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp) -#else - pushl $SYSENTER_RETURN...

...D=3D=3D=3D --- linux-2.6.21.orig/arch/i386/kernel/entry.S 2007-03-06 18:51:33.00000000= 0 -0800 +++ linux-2.6.21/arch/i386/kernel/entry.S 2007-03-15 18:14:11.000000000 -08= 00 @@ -305,16 +305,12 @@ sysenter_past_esp: pushl $(__USER_CS) CFI_ADJUST_CFA_OFFSET 4 /*CFI_REL_OFFSET cs, 0*/ -#ifndef CONFIG_COMPAT_VDSO /* * Push current_thread_info()->sysenter_return to the stack. * A tiny bit of offset fixup is necessary - 4*4 means the 4 words * pushed above; +8 corresponds to copy_thread's esp0 setting. */ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp) -#else - pushl $SYSENTER_RETURN...

This adds support for CONFIG_COMPAT_VDSO. As this will certainly raise questions, I left in the code needed for an alternative approach (which requires mode C code, but less build script changes). Signed-off-by: Jan Beulich <jbeulich@novell.com> Index: head-2007-02-27/arch/i386/Kconfig =============================================...

This adds support for CONFIG_COMPAT_VDSO. As this will certainly raise questions, I left in the code needed for an alternative approach (which requires mode C code, but less build script changes). Signed-off-by: Jan Beulich <jbeulich@novell.com> Index: head-2007-02-27/arch/i386/Kconfig =============================================...

This adds support for CONFIG_COMPAT_VDSO. As this will certainly raise questions, I left in the code needed for an alternative approach (which requires mode C code, but less build script changes). Signed-off-by: Jan Beulich <jbeulich@novell.com> Index: head-2007-02-27/arch/i386/Kconfig =============================================...

Hi Andi, Four patches: - clean up asm/bugs.h, by moving all the C code into its own C file - split identify_cpu() into boot and secondary variants, so that boot-time setup functions can be marked __init - repost of the COMPAT_VDSO patches with a bit more robustness from unknown DT_tags, and functions marked __init, since all this is boot-time only setup. Thanks, J --

Hi Andi, Four patches: - clean up asm/bugs.h, by moving all the C code into its own C file - split identify_cpu() into boot and secondary variants, so that boot-time setup functions can be marked __init - repost of the COMPAT_VDSO patches with a bit more robustness from unknown DT_tags, and functions marked __init, since all this is boot-time only setup. Thanks, J --

Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. The main change from the last posting is that all the page-table related patches have been moved out, and will be posted separately. Also, the off-by-one in reserving the top of address space has been

Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. The main change from the last posting is that all the page-table related patches have been moved out, and will be posted separately. Also, the off-by-one in reserving the top of address space has been

Hi, all, I have difficulty on setting up lguest. Basic OS info: gcc 4.1.2 glibc: 2.5.1 binutils: 2.17 kernel: 2.6.23-rc1 Following lguest.txt instruction, I build lguest enaled kernel, disable CONFIG_COMPAT_VDSO, the host kernel boot fine, but when booting Qemu image using lguest laucher program, the guest kernel vmlinux panic, attached console.txt is console output, and config.txt is kernel configuration. Thanks in advance. -------------- next part -------------- # # Automatically generated make config: d...

Hi, all, I have difficulty on setting up lguest. Basic OS info: gcc 4.1.2 glibc: 2.5.1 binutils: 2.17 kernel: 2.6.23-rc1 Following lguest.txt instruction, I build lguest enaled kernel, disable CONFIG_COMPAT_VDSO, the host kernel boot fine, but when booting Qemu image using lguest laucher program, the guest kernel vmlinux panic, attached console.txt is console output, and config.txt is kernel configuration. Thanks in advance. -------------- next part -------------- # # Automatically generated make config: d...

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. For the most part, these patches do nothing or very little. The patches should

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. For the most part, these patches do nothing or very little. The patches should

...i386/mm/pgtable.c Tue Dec 12 13:51:13 2006 -0800 @@ -171,6 +171,8 @@ void reserve_top_address(unsigned long r void reserve_top_address(unsigned long reserve) { BUG_ON(fixmaps > 0); + printk(KERN_INFO "Reserving virtual address space above 0x%08x\n", + (int)-reserve); #ifdef CONFIG_COMPAT_VDSO BUG_ON(reserve != 0); #else diff -r d8711b11c1eb include/asm-i386/timer.h --- a/include/asm-i386/timer.h Tue Dec 12 13:51:06 2006 -0800 +++ b/include/asm-i386/timer.h Tue Dec 12 13:51:13 2006 -0800 @@ -8,6 +8,7 @@ void setup_pit_timer(void); /* Modifiers for buggy PIT handling */ extern int pi...

...i386/mm/pgtable.c Tue Dec 12 13:51:13 2006 -0800 @@ -171,6 +171,8 @@ void reserve_top_address(unsigned long r void reserve_top_address(unsigned long reserve) { BUG_ON(fixmaps > 0); + printk(KERN_INFO "Reserving virtual address space above 0x%08x\n", + (int)-reserve); #ifdef CONFIG_COMPAT_VDSO BUG_ON(reserve != 0); #else diff -r d8711b11c1eb include/asm-i386/timer.h --- a/include/asm-i386/timer.h Tue Dec 12 13:51:06 2006 -0800 +++ b/include/asm-i386/timer.h Tue Dec 12 13:51:13 2006 -0800 @@ -8,6 +8,7 @@ void setup_pit_timer(void); /* Modifiers for buggy PIT handling */ extern int pi...

...i386/mm/pgtable.c Tue Dec 12 13:51:13 2006 -0800 @@ -171,6 +171,8 @@ void reserve_top_address(unsigned long r void reserve_top_address(unsigned long reserve) { BUG_ON(fixmaps > 0); + printk(KERN_INFO "Reserving virtual address space above 0x%08x\n", + (int)-reserve); #ifdef CONFIG_COMPAT_VDSO BUG_ON(reserve != 0); #else diff -r d8711b11c1eb include/asm-i386/timer.h --- a/include/asm-i386/timer.h Tue Dec 12 13:51:06 2006 -0800 +++ b/include/asm-i386/timer.h Tue Dec 12 13:51:13 2006 -0800 @@ -8,6 +8,7 @@ void setup_pit_timer(void); /* Modifiers for buggy PIT handling */ extern int pi...