On 03/15/2010 10:33 AM, Marcelo Tosatti wrote:
Are there any good ways to solve this kind of problems?
You can introduce a new get_dirty_log ioctl that passes the address
of the next bitmap in userspace, and use it (after pinning with
get_user_pages), instead of vmalloc'ing.
No pinning please, put_user_bit() or set_bit_user().
(can be implemented generically using get_user_pages() and
kmap_atomic(), but x86 should get an optimized implementation)
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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