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RE: [Xen-devel] [PATCH] fix problem of fast syscall on 2.6 kerne withlibc2.3.3 tls


  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Ling, Xiaofeng" <xiaofeng.ling@xxxxxxxxx>
  • Date: Tue, 14 Jun 2005 10:52:40 +0800
  • Delivery-date: Tue, 14 Jun 2005 02:51:52 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcVsBnu4OWxlKYl6SH+X9nLmegsYmQBzklfgAKpLrxA=
  • Thread-topic: [Xen-devel] [PATCH] fix problem of fast syscall on 2.6 kerne withlibc2.3.3 tls

Any comments about this patch?

Ling, Xiaofeng <> wrote:
> Currently, run a 2.6 kernel with Redhat-FC2 file system, that has
> /lib/tls enabled, any command will fail with a segment fault. 
> This is dur to the kernel using sysenter as fast syscall in vmx
> domain and there are three msr need to save and restore when do
> scheduling.  
> 
> 
> Signed-off-by: Xiaofeng Ling <xiaofeng.ling@xxxxxxxxx>
>               Chengyuan Li <chengyuan.li@xxxxxxxxx>
> 
>  arch/x86/vmx.c             |   47
>  ++++++++++++++++++++++++++++++++++++++++-----
>  include/asm-x86/vmx_vmcs.h |    3 ++ 2 files changed, 45
> insertions(+), 5 deletions(-) 

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