Re: [Qemu-devel] [PATCH] block: Add -drive detect_zero=on|off option to detect all zero writes.

[Paolo Bonzini]

Il 30/07/2012 16:03, Eric Blake ha scritto:
> Ooh, nice bullet point to add to my upcoming presentation at Linux
> Plumber's Conference in a month:
> http://summit.linuxplumbersconf.org/lpc-2012/meeting/33/lpc2012-ref-improved-virt-disk-handling/
> 
> Does anyone else have some annoyances about large sparse file handling
> where improving the kernel would make our life easier, that I should
> incorporate into my discussion?

In case you haven't mentioned them:

* lseek(SEEK_HOLE/SEEK_DATA) support in the block layer using GET LBA
STATUS.

* support for connecting to an iSCSI target without scanning partitions.

* support for fsync/fdatasync with ranges (or alternatively,
sync_file_range that writes metadata).

Paolo