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