Merge remote-tracking branch 'fp/master'

7 files changed, 169 insertions, 3 deletions

diff --git a/hurd/debugging/rpctrace.mdwn b/hurd/debugging/rpctrace.mdwn
index df6290f7..c506861a 100644
--- a/hurd/debugging/rpctrace.mdwn
+++ b/hurd/debugging/rpctrace.mdwn
@@ -167,6 +167,14 @@ See `rpctrace --help` about how to use it.
           Debian-specific, but not ready for upstream either...
         <youpi> antrik: yes
 
+* IRC, freenode, #hurd, 2012-07-18
+
+        <braunr> hm, rpctrace on gitk gives an interesting result
+        <braunr>   152<--153(pid1849)->io_set_all_openmodes_request (267) = 0 
+        <braunr> rpctrace:
+          /home/rbraun/hd0s7/hurd/hurd-20120710/./utils/rpctrace.c:1287:
+          trace_and_forward: Assertion `reply_type == 18' failed.
+
 
 # See Also
 
diff --git a/hurd/subhurd/discussion.mdwn b/hurd/subhurd/discussion.mdwn
index 3449edcd..c4fc047f 100644
--- a/hurd/subhurd/discussion.mdwn
+++ b/hurd/subhurd/discussion.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2011 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2011, 2012 Free Software Foundation, Inc."]]
 
 [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
 id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -8,9 +8,10 @@ Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
 is included in the section entitled [[GNU Free Documentation
 License|/fdl]]."]]"""]]
 
-[[!tag open_issue_documentation]]
+[[!tag open_issue_documentation open_issue_hurd]]
 
-IRC, freenode, #hurd, 2011-08-10
+
+# IRC, freenode, #hurd, 2011-08-10
 
     < braunr> youpi: aren't sub-hurds actually called "neighbor hurds" ?
     < youpi> no idea
@@ -67,3 +68,92 @@ IRC, freenode, #hurd, 2011-08-10
     < antrik> I don't think that's actually supported in the boot
       program... but it doesn't really matter, as you don't really need the
       terminal anyways -- you can always log in through the network
+
+
+# IRC, freenode, #hurd, 2012-07-31
+
+    <gg0> subhurd seems like bsd jail (tried none of them)
+    <antrik> gg0: nope. BSD jails are mostly chroot AIUI. subhurd is quite
+      different
+    <antrik> gg0: you actually boot a completely new system instance
+    <antrik> complete with all the Hurd servers, UNIX daemons etc.
+    <braunr> jails are between subhhurds and chroots :p
+    <braunr> i suppose there is nothing against making the root server of the
+      subhurd use a file instead of a raw disk, is there ?
+    <gg0> well, I said jails cos afaik are more isolated from real system than
+      chroots
+    <braunr> yes
+    <gg0> maybe comparing subhurd to virtual machines would be more
+      appropriated then
+    <braunr> they're not VMs either
+    <gg0> say chroot -> jail -> subhurd -> vm ?
+    <braunr> unless you consider the microkernel to be a hypervisor, with its
+      own architecture, which some actually do
+    <braunr> gg0: something like that, yes
+    <gg0> [system-in-system evolution]
+    <braunr> a subhurd is an operating system instance
+    <braunr> i think the closest analogy you can get is openvz
+    <antrik> yeah, I'd also consider it closest. but it's still quite
+      different: with OpenVZ, the kernel facilities are only logically
+      isolated; but they use the same kernel code. with subhurds, most of the
+      system facilities are independent
+
+
+# IRC, freenode, #hurd, 2012-08-03
+
+    <antrik> hm... are Mach task IDs exposed to userspace?
+    <braunr> antrik: ids ?
+    <braunr> antrik: what do you call a mach task id ?
+    <antrik> task have numeric IDs in the kernel
+    <antrik> I wonder whether these are ever exposed to userspace
+    <braunr> i'm not sure
+    <braunr> i don't remember the had numeric IDs
+    <braunr> they*
+    <antrik> well, perhaps I'm making things up... but I believe I saw such IDs
+      in the debugger and/or in error messages
+    <braunr> probably their address
+    <braunr> or creation time orpc_sample
+    <antrik> braunr: well, any unique ID would do
+    <braunr> antrik: yes but i was wondering what kdb would actually show
+    <antrik> I just realised that it would be useful for debugging accross
+      subhurds or kernel/userspace if some kind of unique task IDs could be
+      shown in ps output
+    <braunr> yes
+    <braunr> this requires some thought though
+    <braunr> ps shouldn't show that
+    <braunr> there should be mach specific commands i suppose
+    <braunr> but then, gdb and other tools wouldn't have access to subhurd
+      tasks either
+    <antrik> why shouldn't ps show that? I don't think it's any more sensitive
+      information than all the other stuff ps shows...
+    <braunr> it doesn't feel right
+    <braunr> i would want my system instances to be truely isolated
+    <braunr> and use special "cross instance" facilities
+    <braunr> when necessary
+    <antrik> that's completely orthogonal to what I'm talking about
+    <braunr> like eth-multiplexer
+    <braunr> you seem to be talking about security
+    <braunr> or privacy
+    <antrik> we discussed such options when zhengda worked on rootless subhurd
+    <antrik> no, I'm talking about convenient debugging
+    <braunr> right
+    <braunr> i don't think it'zs orthogonal here
+    <braunr> if we increase separation, it becomes less convenient
+    <antrik> for debugging purposes you would *not* use the isolation options
+    <braunr> ok so you propose two modes of operations
+    <antrik> BTW, as an isolated subhurd relies on the parent, it makes no
+      sense to hide subhurd tasks from the parent hurd -- only hide parent hurd
+      task from the subhurd
+    <braunr> agreed
+    <antrik> so even with an isolated subhurd global task IDs would still be
+      useful
+
+
+# IRC, freenode, #hurd, 2012-08-06
+
+    <braunr> antrik: if i'm right, the root file system executable is read from
+      the parent, right ?
+    <antrik> braunr: probably... I'm not sure about that part
+    <braunr> antrik: i've installed the same packages in both the main and
+      subhurds to be sure
+    <braunr> and to have the right binary and debugging symbols in gdb anyway
diff --git a/hurd/translator.mdwn b/hurd/translator.mdwn
index d504b41f..37f4e8bc 100644
--- a/hurd/translator.mdwn
+++ b/hurd/translator.mdwn
@@ -93,6 +93,8 @@ The [[concept|concepts]] of translators creates its own problems, too:
 * [[magic]]
 * [[unionfs]]
 * [[nfs]]
+* [[symlink]]
+* [[firmlink]]
 * ...
 
 
diff --git a/hurd/translator/ext2fs.mdwn b/hurd/translator/ext2fs.mdwn
index 8e15d1c7..460194f9 100644
--- a/hurd/translator/ext2fs.mdwn
+++ b/hurd/translator/ext2fs.mdwn
@@ -20,6 +20,8 @@ License|/fdl]]."]]"""]]
 
   * [[metadata_caching]]
 
+  * [[internal_allocator]]
+
 
 ## Large Stores
 
diff --git a/hurd/translator/ext2fs/internal_allocator.mdwn b/hurd/translator/ext2fs/internal_allocator.mdwn
new file mode 100644
index 00000000..f3678a28
--- /dev/null
+++ b/hurd/translator/ext2fs/internal_allocator.mdwn
@@ -0,0 +1,39 @@
+[[!meta copyright="Copyright © 2012 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!tag open_issue_documentation]]
+
+
+# IRC, freenode, #hurd, 2012-07-30
+
+    <mcsim> Why for big buffers in ext2fs used own allocator, that just
+      allocates many pages at once, instead of using malloc?
+    <mcsim> i.e. can I replace it with malloc, because it just complicates
+      things?
+    <braunr> mcsim: probably because of alignment
+    <braunr> what gets complicated by that ?
+    <mcsim> braunr: than valloc?
+    <mcsim> braunr: this allocator allows to allocate only buffer with size of
+      vm_page_size.
+    <mcsim> valloc just would be clearer.
+    <braunr> valloc ?
+    <braunr> valloc is obsolete
+    <mcsim> braunr: than memalign or posix_memalign?
+    <mcsim> memalign obsolete too... would posix_memalign be eligible?
+    <braunr> mcsim: why memalign instead of the custom allocator ?
+    <mcsim> because, I think, it is clearer. Also, since I need to allocate any
+      amount of pages, not just one, I have to edit custom allocator. Although
+      it is not hard, but using ready stuff seems more sane for me.
+    <mcsim> braunr: ^
+    <braunr> right, but make sure posix_memalign doesn't create too much
+      overhead
+    <mcsim> braunr: what kind of overhead?
+    <braunr> fragmentation
+    <braunr> i assume the glibc implementation is careful about that, but still
diff --git a/hurd/translator/firmlink.mdwn b/hurd/translator/firmlink.mdwn
new file mode 100644
index 00000000..038879db
--- /dev/null
+++ b/hurd/translator/firmlink.mdwn
@@ -0,0 +1,22 @@
+[[!meta copyright="Copyright © 2012 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!tag open_issue_documentation]]
+
+
+# IRC, freenode, #hurd, 2012-07-20
+
+    <infinity0> does hurd have equivalent of mount --bind yet?
+    <kilobug> infinity0: unionfs with just one back-end ?
+    <infinity0> ah cool i'll try thaty
+    <kilobug> there may be something better, but that's the one I know about ;)
+    <braunr> infinity0: firmlinks
+    <infinity0> ah thanks i'll look that up
+    <kilobug> braunr: oh, true, I forgot about that one
diff --git a/hurd/translator/procfs/jkoenig/discussion.mdwn b/hurd/translator/procfs/jkoenig/discussion.mdwn
index 3ea8d0c6..2acca39c 100644
--- a/hurd/translator/procfs/jkoenig/discussion.mdwn
+++ b/hurd/translator/procfs/jkoenig/discussion.mdwn
@@ -279,6 +279,9 @@ Needed by glibc's `pldd` tool (commit
 
 # `/proc/[PID]/maps`
 
+[[!tag GNU_Savannah_bug 32770]]
+
+
 ## IRC, OFTC, #debian-hurd, 2012-06-20
 
     <pinotree> bdefreese: the two elfutils tests fail because there are no