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Documentation / aoe / todo.txt




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Based on kernel version 3.13. Page generated on 2014-01-20 22:00 EST.

1	There is a potential for deadlock when allocating a struct sk_buff for
2	data that needs to be written out to aoe storage.  If the data is
3	being written from a dirty page in order to free that page, and if
4	there are no other pages available, then deadlock may occur when a
5	free page is needed for the sk_buff allocation.  This situation has
6	not been observed, but it would be nice to eliminate any potential for
7	deadlock under memory pressure.
8	
9	Because ATA over Ethernet is not fragmented by the kernel's IP code,
10	the destructor member of the struct sk_buff is available to the aoe
11	driver.  By using a mempool for allocating all but the first few
12	sk_buffs, and by registering a destructor, we should be able to
13	efficiently allocate sk_buffs without introducing any potential for
14	deadlock.
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