Subject: [patch] paravirt: VDSO page is essential From: Ingo Molnar <[EMAIL PROTECTED]>
commit 3bbf54725467d604698721384d858b5983b87e8f disables the VDSO for CONFIG_PARAVIRT kernels. This #ifdeffery was a bad change: the VDSO is an essential component of Linux, and this change forces all of them to use int $0x80 - including sane ones like KVM. (If a hypervisor does not handle the VDSO properly then it can work things around via the vdso=0 boot option. Or CONFIG_PARAVIRT should not have been merged. But in any case, it is a basic taste issue: we DO NOT #ifdef around core features like this!) Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]> --- arch/i386/kernel/sysenter.c | 4 ---- 1 file changed, 4 deletions(-) Index: linux/arch/i386/kernel/sysenter.c =================================================================== --- linux.orig/arch/i386/kernel/sysenter.c +++ linux/arch/i386/kernel/sysenter.c @@ -27,11 +27,7 @@ * Should the kernel map a VDSO page into processes and pass its * address down to glibc upon exec()? */ -#ifdef CONFIG_PARAVIRT -unsigned int __read_mostly vdso_enabled = 0; -#else unsigned int __read_mostly vdso_enabled = 1; -#endif EXPORT_SYMBOL_GPL(vdso_enabled); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
