The patch titled
uml: host TLS diagnostics
has been added to the -mm tree. Its filename is
uml-host-tls-diagnostics.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: uml: host TLS diagnostics
From: Jeff Dike <jdike@xxxxxxxxxxx>
Add some diagnostics when TLS operations on the host fail. Also spit out more
information about the TLS environment on the host at boot time.
Signed-off-by: Jeff Dike <jdike@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/um/sys-i386/tls.c | 30 +++++++++++++++++++++---------
1 file changed, 21 insertions(+), 9 deletions(-)
diff -puN arch/um/sys-i386/tls.c~uml-host-tls-diagnostics arch/um/sys-i386/tls.c
--- a/arch/um/sys-i386/tls.c~uml-host-tls-diagnostics
+++ a/arch/um/sys-i386/tls.c
@@ -26,6 +26,11 @@ int do_set_thread_area(struct user_desc
cpu = get_cpu();
ret = os_set_thread_area(info, userspace_pid[cpu]);
put_cpu();
+
+ if (ret)
+ printk(KERN_ERR "PTRACE_SET_THREAD_AREA failed, err = %d, "
+ "index = %d\n", ret, info->entry_number);
+
return ret;
}
@@ -37,6 +42,11 @@ int do_get_thread_area(struct user_desc
cpu = get_cpu();
ret = os_get_thread_area(info, userspace_pid[cpu]);
put_cpu();
+
+ if (ret)
+ printk(KERN_ERR "PTRACE_GET_THREAD_AREA failed, err = %d, "
+ "index = %d\n", ret, info->entry_number);
+
return ret;
}
@@ -356,10 +366,9 @@ out:
return ret;
}
-
/*
- * XXX: This part is probably common to i386 and x86-64. Don't create a common
- * file for now, do that when implementing x86-64 support.
+ * This code is really i386-only, but it detects and logs x86_64 GDT indexes
+ * if a 32-bit UML is running on a 64-bit host.
*/
static int __init __setup_host_supports_tls(void)
{
@@ -368,13 +377,16 @@ static int __init __setup_host_supports_
printk(KERN_INFO "Host TLS support detected\n");
printk(KERN_INFO "Detected host type: ");
switch (host_gdt_entry_tls_min) {
- case GDT_ENTRY_TLS_MIN_I386:
- printk("i386\n");
- break;
- case GDT_ENTRY_TLS_MIN_X86_64:
- printk("x86_64\n");
- break;
+ case GDT_ENTRY_TLS_MIN_I386:
+ printk(KERN_CONT "i386");
+ break;
+ case GDT_ENTRY_TLS_MIN_X86_64:
+ printk(KERN_CONT "x86_64");
+ break;
}
+ printk(KERN_CONT " (GDT indexes %d to %d)\n",
+ host_gdt_entry_tls_min,
+ host_gdt_entry_tls_min + GDT_ENTRY_TLS_ENTRIES);
} else
printk(KERN_ERR " Host TLS support NOT detected! "
"TLS support inside UML will not work\n");
_
Patches currently in -mm which might be from jdike@xxxxxxxxxxx are
origin.patch
git-kvm.patch
uml-arch-um-include-inith-needs-a-definition-of-__used.patch
uml-implement-get_wchan.patch
uml-implement-get_wchan-fix.patch
uml-get-rid-of-asmlinkage.patch
uml-get-rid-of-asmlinkage-checkpatch-fixes.patch
uml-document-new-ubd-flag.patch
uml-further-bugsc-tidying.patch
uml-further-bugsc-tidying-checkpatch-fixes.patch
uml-smp-needs-to-depend-on-broken-for-now.patch
uml-console-driver-cleanups.patch
uml-clonec-tidying.patch
uml-borrow-consth-techniques.patch
uml-delete-some-unused-headers.patch
uml-allow-lflags-on-command-line.patch
uml-tidy-kern_utilh.patch
uml-tidy-pgtableh.patch
uml-tidy-pgtableh-fix.patch
uml-reconst-a-parameter.patch
arch-um-remove-duplicate-includes.patch
uml-host-tls-diagnostics.patch
iget-stop-hostfs-from-using-iget-and-read_inode.patch
iget-stop-hostfs-from-using-iget-and-read_inode-checkpatch-fixes.patch
-
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