✎ soc:2008:stefanha:journal:week9

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====== Stefan Hajnoczi: GDB Remote Debugging ======

===== Week 9 =====

**Milestones:**
  * [b44] Tested and clean for mainline review.

==== Mon 21 Jul ====
Git commit:
  * [[http://git.etherboot.org/?p=people/stefanha/gpxe.git;a=commit;h=b88a864e951d4588267131fde00c42464e6c021c|[hmalloc] Kill uhmalloc, use malloc's allocator instead]]

**Committed switch from uhmalloc to hmalloc**.  For the DMA mapping work, I reused umalloc's memory allocator and called it uhmalloc.  After discussion with mcb30 and mdc, it turned out that the malloc allocator is better suited.  This commit rips out uhmalloc and rewrites DMA mapping to use malloc's allocator.

==== Tue 22 Jul ====
Git commit:
  * [[http://git.etherboot.org/?p=people/stefanha/gpxe.git;a=commit;h=1bbaa358c63df64bab38c45ad11fc93ea2a8e510|[prefix] Reasonable value for lkrn initrd_addr_max]]

I've been busy most of the day since I'll be travelling tomorrow.  HPA informed me of a bug in the updated bzImage work I did.  Luckily the source of the bug was already identified, I simply needed to change the hardcoded ''initrd_addr_max'' value in ''arch/i386/prefix/lkrnprefix.S''.

==== Fri 25 Jul ====
Git commit:
  * [[http://git.etherboot.org/?p=people/stefanha/gpxe.git;a=commit;h=13112d3fc913bb6117ab67afb1b10fc907ead0a0|[b44] Format lines to 80 characters]]
  * [[http://git.etherboot.org/?p=people/stefanha/gpxe.git;a=commit;h=09556d9943a99a9ef66990873c6724db693964cc|[DMA] Use dma_buf struct to simplify interface]]

**DMA mapping work continues**.  I'm reworking things from all sides hmalloc, dma_mapping, and b44.  Hopefully it will converge soon :-).

==== Sun 27 Jul ====
**The Roundup issue tracker** is close to ready.  Mdc and I have spent some time setting up the [[http://roundup.sf.net/|Roundup issue tracker]] to improve our grasp on patches and bugs.

Currently we suffer the problem that patches are easily forgotten on the mailing list if the developers are busy.  An issue tracker provides a better overview of outstanding patches that need to be reviewed.

Bug reports are also streamlined by the new system.  This will be especially useful in the coming months as Etherboot.org becomes more visible and new users try it.

Next steps:
  * [GDB] Add sample GDB session to wiki and explain commands
  * [DMA] DMA pool API so drivers can reserve DMA buffers on ''open()''.
  * [b44] Cleanup, testing, performance.
  * [shutdown] Remove gPXE allocated memory and free up PXE+UNDI, if necessary.
  * [bzImage] Expand the heap size to the full 64K segment when loading a bzImage kernel with version 2.02 or higher.
  * [GDB] Real-mode remote debugging.

Trace: • week8 • qemupxeknife • debian_aoe_migrate • week3 • navigation • week7 • vmwarebios • week7 • week9 • copyright • week4

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