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xen
libxl.max_event_channels.patch
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File libxl.max_event_channels.patch of Package xen
References: bsc#1167608 unbound limits for max_event_channels 1023 is too low for a three digit value of vcpus it is difficult to make the value depend on the number of vcpus adding devices at runtime also needs event channels But, having an unbound value (of 128k) may have a negative effect on XSA-344. Therefore, just let the built-in default depend on the number of vcpus. Index: xen-4.17.0-testing/tools/libs/light/libxl_create.c =================================================================== --- xen-4.17.0-testing.orig/tools/libs/light/libxl_create.c +++ xen-4.17.0-testing/tools/libs/light/libxl_create.c @@ -263,7 +263,7 @@ int libxl__domain_build_info_setdefault( b_info->iomem[i].gfn = b_info->iomem[i].start; if (!b_info->event_channels) - b_info->event_channels = 1023; + b_info->event_channels = max(1023, 8 * b_info->max_vcpus + 511); rc = libxl_get_physinfo(CTX, &info); if (rc) {
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