diff options
| author | Anthony Liguori <aliguori@us.ibm.com> | 2011-08-22 08:24:58 -0500 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2011-09-02 10:34:55 -0500 |
| commit | 12d4536f7d911b6d87a766ad7300482ea663cea2 (patch) | |
| tree | 848fe9cb11b82145fae05ee05aace4f90a3564af /configure | |
| parent | d9cd446b4f6ff464f9520898116534de988d9bc1 (diff) | |
| download | qemu-12d4536f7d911b6d87a766ad7300482ea663cea2.tar.gz | |
main: force enabling of I/O thread
Enabling the I/O thread by default seems like an important part of declaring
1.0. Besides allowing true SMP support with KVM, the I/O thread means that the
TCG VCPU doesn't have to multiplex itself with the I/O dispatch routines which
currently requires a (racey) signal based alarm system.
I know there have been concerns about performance. I think so far the ones that
have come up (virtio-net) are most likely due to secondary reasons like
decreased batching.
I think we ought to force enabling I/O thread early in 1.0 development and
commit to resolving any lingering issues.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 13 |
1 files changed, 0 insertions, 13 deletions
@@ -165,7 +165,6 @@ darwin_user="no" bsd_user="no" guest_base="" uname_release="" -io_thread="no" mixemu="no" aix="no" blobs="yes" @@ -723,8 +722,6 @@ for opt do ;; --enable-attr) attr="yes" ;; - --enable-io-thread) io_thread="yes" - ;; --disable-blobs) blobs="no" ;; --with-pkgversion=*) pkgversion=" ($optarg)" @@ -2158,12 +2155,6 @@ EOF if compile_prog "" "" ; then signalfd=yes -elif test "$kvm" = "yes" -a "$io_thread" != "yes"; then - echo - echo "ERROR: Host kernel lacks signalfd() support," - echo "but KVM depends on it when the IO thread is disabled." - echo - exit 1 fi # check if eventfd is supported @@ -2710,7 +2701,6 @@ echo "NPTL support $nptl" echo "GUEST_BASE $guest_base" echo "PIE user targets $user_pie" echo "vde support $vde" -echo "IO thread $io_thread" echo "Linux AIO support $linux_aio" echo "ATTR/XATTR support $attr" echo "Install blobs $blobs" @@ -2968,9 +2958,6 @@ if test "$xen" = "yes" ; then echo "CONFIG_XEN_BACKEND=y" >> $config_host_mak echo "CONFIG_XEN_CTRL_INTERFACE_VERSION=$xen_ctrl_version" >> $config_host_mak fi -if test "$io_thread" = "yes" ; then - echo "CONFIG_IOTHREAD=y" >> $config_host_mak -fi if test "$linux_aio" = "yes" ; then echo "CONFIG_LINUX_AIO=y" >> $config_host_mak fi |