diff options
author | Jens Axboe <jaxboe@fusionio.com> | 2010-10-19 09:13:04 +0200 |
---|---|---|
committer | Jens Axboe <jaxboe@fusionio.com> | 2010-10-19 09:13:04 +0200 |
commit | fa251f89903d73989e2f63e13d0eaed1e07ce0da (patch) | |
tree | 3f7fe779941e3b6d67754dd7c44a32f48ea47c74 /arch/x86/lguest/boot.c | |
parent | dd3932eddf428571762596e17b65f5dc92ca361b (diff) | |
parent | cd07202cc8262e1669edff0d97715f3dd9260917 (diff) | |
download | op-kernel-dev-fa251f89903d73989e2f63e13d0eaed1e07ce0da.zip op-kernel-dev-fa251f89903d73989e2f63e13d0eaed1e07ce0da.tar.gz |
Merge branch 'v2.6.36-rc8' into for-2.6.37/barrier
Conflicts:
block/blk-core.c
drivers/block/loop.c
mm/swapfile.c
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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) { |