Revision 49a57857aeea06ca831043acbb0fa5e0f50602fd authored by Linus Torvalds on 21 January 2019, 00:14:44 UTC, committed by Linus Torvalds on 21 January 2019, 00:14:44 UTC
1 parent 1e556ba
todo.txt
There is a potential for deadlock when allocating a struct sk_buff for
data that needs to be written out to aoe storage. If the data is
being written from a dirty page in order to free that page, and if
there are no other pages available, then deadlock may occur when a
free page is needed for the sk_buff allocation. This situation has
not been observed, but it would be nice to eliminate any potential for
deadlock under memory pressure.
Because ATA over Ethernet is not fragmented by the kernel's IP code,
the destructor member of the struct sk_buff is available to the aoe
driver. By using a mempool for allocating all but the first few
sk_buffs, and by registering a destructor, we should be able to
efficiently allocate sk_buffs without introducing any potential for
deadlock.
Computing file changes ...
