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Re: [Qemu-devel] [PATCH] block: Add -drive detect_zero=on|off option to

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH] block: Add -drive detect_zero=on|off option to detect all zero writes.
Date: Mon, 30 Jul 2012 16:09:32 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1

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

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

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


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