Re: [Qemu-devel] [PATCH] qcow2: Unset zero_beyond_eof in save_vmstate

2013-10-24 Thread Kevin Wolf
Am 21.10.2013 um 22:37 hat Eric Blake geschrieben: On 10/20/2013 08:52 PM, Max Reitz wrote: Saving the VM state is done using bdrv_pwrite. This function may perform a read-modify-write, which in this case results in data being read from beyond the end of the virtual disk. Since we are

Re: [Qemu-devel] [PATCH] qcow2: Unset zero_beyond_eof in save_vmstate

2013-10-23 Thread Max Reitz
On 2013-10-21 22:37, Eric Blake wrote: On 10/20/2013 08:52 PM, Max Reitz wrote: Saving the VM state is done using bdrv_pwrite. This function may perform a read-modify-write, which in this case results in data being read from beyond the end of the virtual disk. Since we are actually trying to

Re: [Qemu-devel] [PATCH] qcow2: Unset zero_beyond_eof in save_vmstate

2013-10-23 Thread Max Reitz
On 2013-10-21 22:37, Eric Blake wrote: On 10/20/2013 08:52 PM, Max Reitz wrote: Saving the VM state is done using bdrv_pwrite. This function may perform a read-modify-write, which in this case results in data being read from beyond the end of the virtual disk. Since we are actually trying to

Re: [Qemu-devel] [PATCH] qcow2: Unset zero_beyond_eof in save_vmstate

2013-10-21 Thread Eric Blake
On 10/20/2013 08:52 PM, Max Reitz wrote: Saving the VM state is done using bdrv_pwrite. This function may perform a read-modify-write, which in this case results in data being read from beyond the end of the virtual disk. Since we are actually trying to access an area which is not a part of

[Qemu-devel] [PATCH] qcow2: Unset zero_beyond_eof in save_vmstate

2013-10-20 Thread Max Reitz
Saving the VM state is done using bdrv_pwrite. This function may perform a read-modify-write, which in this case results in data being read from beyond the end of the virtual disk. Since we are actually trying to access an area which is not a part of the virtual disk, zero_beyond_eof has to be set