[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Support for -EAGAIN from xc_gnttab_map_grant_ref.
# HG changeset patch # User Keir Fraser <keir.fraser@xxxxxxxxxx> # Date 1261031276 0 # Node ID fe42b16855aa727c36833f19df9ba0e7a163941e # Parent c344350672987de3d27f6d0b8ca75e1ac3882e52 Support for -EAGAIN from xc_gnttab_map_grant_ref. Signed-off-by: Grzegorz Milos <Grzegorz.Milos@xxxxxxxxxx> --- tools/libxc/xc_linux.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletion(-) diff -r c34435067298 -r fe42b16855aa tools/libxc/xc_linux.c --- a/tools/libxc/xc_linux.c Thu Dec 17 06:27:56 2009 +0000 +++ b/tools/libxc/xc_linux.c Thu Dec 17 06:27:56 2009 +0000 @@ -442,13 +442,19 @@ void *xc_gnttab_map_grant_ref(int xcg_ha if ( ioctl(xcg_handle, IOCTL_GNTDEV_MAP_GRANT_REF, &map) ) return NULL; +mmap_again: addr = mmap(NULL, PAGE_SIZE, prot, MAP_SHARED, xcg_handle, map.index); if ( addr == MAP_FAILED ) { int saved_errno = errno; struct ioctl_gntdev_unmap_grant_ref unmap_grant; - /* Unmap the driver slots used to store the grant information. */ + if(saved_errno == EAGAIN) + { + usleep(1000); + goto mmap_again; + } + /* Unmap the driver slots used to store the grant information. */ perror("xc_gnttab_map_grant_ref: mmap failed"); unmap_grant.index = map.index; unmap_grant.count = 1; _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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