Re: [Qemu-devel] [PATCH V2 for 2.1 0/3] bug fixs for memory backend

[Michael S. Tsirkin]

On Mon, Jul 07, 2014 at 06:24:59AM +0300, Michael S. Tsirkin wrote:
> On Mon, Jul 07, 2014 at 10:58:05AM +0800, Hu Tao wrote:
> > This series includes three patches to fix bugs of memory backend. Patch
> > 1 prepares for next patches, patch 2 and patch 3 fix two bugs
> > respectively, see each patch for the bugs and how to reproduce them.
> > 
> > changes to v1:
> > 
> >   - split patch 1 in v1 into 2 patches
> >   - don't rely on ram_block_add to return -1
> >   - error message tweak in file_ram_alloc
> >   - add error messages reported by qemu to commit message of patch 3
> > 
> > Hu Tao (3):
> >   memory: rename memory_region_init_ram() and
> >     memory_region_init_ram_ptr()
> >   memory: add errp parameter to memory_region_init_ram() and    
> >     memory_region_init_ram_ptr()
> >   exec: improve error handling and reporting in file_ram_alloc() and
> >     gethugepagesize()
> 
> I fixed up some minor issues and applied this, thanks.

And reverted.

Build fails, and a simple check after applying patch 1 gives me:
git grep memory_region_init_ram |grep -v nofail|wc -l
132

Apparently you fixed up about 10% of the files using this function.
So forget about me merging patch 1.

Add a new
memory_region_init_ram_may_fail
and
memory_region_init_ram_ptr_may_fail

and use it specifically for the new stuff.

Do the rename on top in two steps:
memory_region_init_ram -> memory_region_init_ram_nofail
memory_region_init_ram_may_fail -> memory_region_init_ram

Paolo can then merge it when he prefers, though I'd say 2.2
is more reasonable.


> >  backends/hostmem-ram.c   |  2 +-
> >  exec.c                   | 51 ++++++++++++++++++++++++++++---------------
> >  hw/block/pflash_cfi01.c  |  5 ++++-
> >  hw/block/pflash_cfi02.c  |  5 ++++-
> >  hw/core/loader.c         |  2 +-
> >  hw/display/vga.c         |  2 +-
> >  hw/display/vmware_vga.c  |  3 ++-
> >  hw/i386/kvm/pci-assign.c |  9 ++++----
> >  hw/i386/pc.c             |  2 +-
> >  hw/i386/pc_sysfw.c       |  4 ++--
> >  hw/misc/ivshmem.c        |  9 ++++----
> >  hw/misc/vfio.c           |  3 ++-
> >  hw/pci/pci.c             |  2 +-
> >  include/exec/memory.h    | 43 +++++++++++++++++++++++++++++++++---
> >  include/exec/ram_addr.h  |  4 ++--
> >  memory.c                 | 57 
> > +++++++++++++++++++++++++++++++++++++++++++-----
> >  numa.c                   |  4 ++--
> >  17 files changed, 158 insertions(+), 49 deletions(-)
> > 
> > -- 
> > 1.9.3