37 lines
1.1 KiB
Diff
37 lines
1.1 KiB
Diff
makedumpfile: disable mmap read
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There's a kernel bug for mapping mem ranges which end with
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an address not aligned to page boundry. It's still not resolved
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in upstream, so let's disable mmap read for now as a workaround.
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Once upstream got a right fix we can revert this patch.
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Signed-off-by: Dave Young <dyoung@redhat.com>
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---
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makedumpfile.c | 7 +++++++
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1 file changed, 7 insertions(+)
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--- kexec-tools/makedumpfile-1.5.4/makedumpfile.c.orig
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+++ kexec-tools/makedumpfile-1.5.4/makedumpfile.c
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@@ -3144,6 +3144,12 @@ out:
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if (info->dump_level & DL_EXCLUDE_FREE)
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setup_page_is_buddy();
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+ /* There's a kernel bug for mapping mem ranges which end with
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+ * an address not aligned to page boundry. It's still not resolved
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+ * in upstream, so let's disable mmap read for now.
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+ */
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+ info->flag_usemmap = FALSE;
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+#if 0
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if (!initialize_mmap()) {
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/* this kernel does not support mmap of vmcore */
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DEBUG_MSG("Kernel can't mmap vmcore, using reads.\n");
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@@ -3152,6 +3158,7 @@ out:
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DEBUG_MSG("read %s with mmap()\n", info->name_memory);
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info->flag_usemmap = TRUE;
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}
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+#endif
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return TRUE;
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}
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