Print out some extra debug information when we hit bad page tables.
This commit is contained in:
Dave Jones
parent
01bed76462
commit
257bb08298
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@ -0,0 +1,64 @@
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diff -durpN '--exclude-from=/home/davej/.exclude' /home/davej/src/kernel/git-trees/linux/include/asm-generic/bug.h linux-dj/include/asm-generic/bug.h
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--- /home/davej/src/kernel/git-trees/linux/include/asm-generic/bug.h 2013-01-04 18:57:12.604282214 -0500
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+++ linux-dj/include/asm-generic/bug.h 2013-02-28 20:04:37.649304147 -0500
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@@ -55,6 +55,8 @@ struct bug_entry {
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#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)
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#endif
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+void print_hardware_dmi_name(void);
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+
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/*
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* WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
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* significant issues that need prompt attention if they should ever
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diff -durpN '--exclude-from=/home/davej/.exclude' /home/davej/src/kernel/git-trees/linux/kernel/panic.c linux-dj/kernel/panic.c
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--- /home/davej/src/kernel/git-trees/linux/kernel/panic.c 2013-02-26 14:41:18.544116674 -0500
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+++ linux-dj/kernel/panic.c 2013-02-28 20:04:37.666304115 -0500
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@@ -397,16 +397,22 @@ struct slowpath_args {
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va_list args;
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};
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-static void warn_slowpath_common(const char *file, int line, void *caller,
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- unsigned taint, struct slowpath_args *args)
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+void print_hardware_dmi_name(void)
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{
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const char *board;
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- printk(KERN_WARNING "------------[ cut here ]------------\n");
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- printk(KERN_WARNING "WARNING: at %s:%d %pS()\n", file, line, caller);
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board = dmi_get_system_info(DMI_PRODUCT_NAME);
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if (board)
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printk(KERN_WARNING "Hardware name: %s\n", board);
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+}
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+
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+static void warn_slowpath_common(const char *file, int line, void *caller,
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+ unsigned taint, struct slowpath_args *args)
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+{
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+ printk(KERN_WARNING "------------[ cut here ]------------\n");
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+ printk(KERN_WARNING "WARNING: at %s:%d %pS()\n", file, line, caller);
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+
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+ print_hardware_dmi_name();
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if (args)
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vprintk(args->fmt, args->args);
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diff -durpN '--exclude-from=/home/davej/.exclude' /home/davej/src/kernel/git-trees/linux/mm/memory.c linux-dj/mm/memory.c
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--- /home/davej/src/kernel/git-trees/linux/mm/memory.c 2013-02-26 14:41:18.591116577 -0500
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+++ linux-dj/mm/memory.c 2013-02-28 20:04:37.678304092 -0500
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@@ -705,6 +706,8 @@ static void print_bad_pte(struct vm_area
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"BUG: Bad page map in process %s pte:%08llx pmd:%08llx\n",
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current->comm,
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(long long)pte_val(pte), (long long)pmd_val(*pmd));
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+ print_hardware_dmi_name();
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+
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if (page)
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dump_page(page);
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printk(KERN_ALERT
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--- linux-dj/mm/page_alloc.c~ 2013-04-11 11:47:12.536675503 -0400
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+++ linux-dj/mm/page_alloc.c 2013-04-11 11:47:16.416667806 -0400
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@@ -321,6 +321,7 @@ static void bad_page(struct page *page)
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current->comm, page_to_pfn(page));
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dump_page(page);
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+ print_hardware_dmi_name();
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print_modules();
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dump_stack();
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out:
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@ -0,0 +1,21 @@
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diff -durpN '--exclude-from=/home/davej/.exclude' /home/davej/src/kernel/git-trees/linux/mm/memory.c linux-dj/mm/memory.c
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--- /home/davej/src/kernel/git-trees/linux/mm/memory.c 2013-02-26 14:41:18.591116577 -0500
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+++ linux-dj/mm/memory.c 2013-02-28 20:04:37.678304092 -0500
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@@ -57,6 +57,7 @@
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#include <linux/swapops.h>
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#include <linux/elf.h>
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#include <linux/gfp.h>
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+#include <linux/module.h>
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#include <linux/migrate.h>
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#include <linux/string.h>
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--- linux-3.8.6-104.fc17.noarch/mm/memory.c~ 2013-04-11 11:48:54.024470277 -0400
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+++ linux-3.8.6-104.fc17.noarch/mm/memory.c 2013-04-11 11:49:15.770425274 -0400
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@@ -718,6 +718,7 @@ static void print_bad_pte(struct vm_area
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if (vma->vm_file && vma->vm_file->f_op)
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print_symbol(KERN_ALERT "vma->vm_file->f_op->mmap: %s\n",
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(unsigned long)vma->vm_file->f_op->mmap);
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+ print_modules();
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dump_stack();
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add_taint(TAINT_BAD_PAGE);
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}
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10
kernel.spec
10
kernel.spec
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@ -628,6 +628,9 @@ Patch101: taint-rss.patch
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Patch110: vmbugon-warnon.patch
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Patch200: debug-bad-pte-dmi.patch
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Patch201: debug-bad-pte-modules.patch
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Patch390: defaults-acpi-video.patch
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Patch391: acpi-video-dos.patch
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Patch394: acpi-debug-infinite-loop.patch
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@ -1324,6 +1327,10 @@ ApplyPatch taint-rss.patch
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ApplyPatch vmbugon-warnon.patch
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ApplyPatch debug-bad-pte-dmi.patch
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ApplyPatch debug-bad-pte-modules.patch
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# Architecture patches
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# x86(-64)
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@ -2373,6 +2380,9 @@ fi
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# '-' | |
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# '-'
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%changelog
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* Thu Apr 11 2013 Dave Jones <davej@redhat.com>
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- Print out some extra debug information when we hit bad page tables.
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* Thu Apr 11 2013 Josh Boyer <jwboyer@redhat.com>
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- Fix ALPS backport patch (rhbz 812111)
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