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author | Dave Airlie <airlied@redhat.com> | 2010-09-24 15:37:33 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2010-09-24 15:37:33 +1000 |
commit | 4a445f291ac3faa08f56eaeb6e44856b6b72b74c (patch) | |
tree | b66cc93311dc4c623113a87aa9b40730a21ac18e /arch/x86/lguest/boot.c | |
parent | cbc60ca04b342a4e1f2a1086a7277c077f07dbed (diff) | |
parent | a850ea30374ebed32a0724742601861853fde869 (diff) | |
download | kernel_goldelico_gta04-4a445f291ac3faa08f56eaeb6e44856b6b72b74c.zip kernel_goldelico_gta04-4a445f291ac3faa08f56eaeb6e44856b6b72b74c.tar.gz kernel_goldelico_gta04-4a445f291ac3faa08f56eaeb6e44856b6b72b74c.tar.bz2 |
Merge remote branch 'origin/master' of /home/airlied/kernel//linux-2.6 into drm-core-next
Diffstat (limited to 'arch/x86/lguest/boot.c')
-rw-r--r-- | arch/x86/lguest/boot.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 9257510..9d5f558 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -324,9 +324,8 @@ static void lguest_load_gdt(const struct desc_ptr *desc) } /* - * For a single GDT entry which changes, we do the lazy thing: alter our GDT, - * then tell the Host to reload the entire thing. This operation is so rare - * that this naive implementation is reasonable. + * For a single GDT entry which changes, we simply change our copy and + * then tell the host about it. */ static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum, const void *desc, int type) @@ -338,9 +337,13 @@ static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum, } /* - * OK, I lied. There are three "thread local storage" GDT entries which change + * There are three "thread local storage" GDT entries which change * on every context switch (these three entries are how glibc implements - * __thread variables). So we have a hypercall specifically for this case. + * __thread variables). As an optimization, we have a hypercall + * specifically for this case. + * + * Wouldn't it be nicer to have a general LOAD_GDT_ENTRIES hypercall + * which took a range of entries? */ static void lguest_load_tls(struct thread_struct *t, unsigned int cpu) { |