From: Heiko Carstens <[EMAIL PROTECTED]> There is no need to use interlocked updates when the rcp lock is held. Therefore the simple bitops variants can be used. This should improve performance.
Signed-off-by: Heiko Carstens <[EMAIL PROTECTED]> Signed-off-by: Carsten Otte <[EMAIL PROTECTED]> --- include/asm-s390/pgtable.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) Index: kvm/include/asm-s390/pgtable.h =================================================================== --- kvm.orig/include/asm-s390/pgtable.h +++ kvm/include/asm-s390/pgtable.h @@ -553,12 +553,12 @@ static inline void ptep_rcp_copy(pte_t * skey = page_get_storage_key(page_to_phys(page)); if (skey & _PAGE_CHANGED) - set_bit(RCP_GC_BIT, pgste); + set_bit_simple(RCP_GC_BIT, pgste); if (skey & _PAGE_REFERENCED) - set_bit(RCP_GR_BIT, pgste); - if (test_and_clear_bit(RCP_HC_BIT, pgste)) + set_bit_simple(RCP_GR_BIT, pgste); + if (test_and_clear_bit_simple(RCP_HC_BIT, pgste)) SetPageDirty(page); - if (test_and_clear_bit(RCP_HR_BIT, pgste)) + if (test_and_clear_bit_simple(RCP_HR_BIT, pgste)) SetPageReferenced(page); #endif } @@ -732,8 +732,8 @@ static inline int ptep_test_and_clear_yo young = ((page_get_storage_key(physpage) & _PAGE_REFERENCED) != 0); rcp_lock(ptep); if (young) - set_bit(RCP_GR_BIT, pgste); - young |= test_and_clear_bit(RCP_HR_BIT, pgste); + set_bit_simple(RCP_GR_BIT, pgste); + young |= test_and_clear_bit_simple(RCP_HR_BIT, pgste); rcp_unlock(ptep); return young; #endif ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
