docs: keep track of when prealloc of map elements were introduced #937
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Kernel v4.6-rc1~91^2~108^2~6
commit 6c9059817432 ("bpf: pre-allocate hash map elements")
Introduced default preallocation of mem elements to solve a deadlock
(when kprobe'ing the memory allocator itself).
This change is also a performance enhancement.
The commit also introduced a map_flags on BPF_MAP_CREATE, which can disable
this preallocation again BPF_F_NO_PREALLOC.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
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[buildbot, ok to test] |
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Kernel v4.6-rc1
91^2108^2~6commit 6c9059817432 ("bpf: pre-allocate hash map elements")
Introduced default preallocation of mem elements to solve a deadlock
(when kprobe'ing the memory allocator itself).
This change is also a performance enhancement.
The commit also introduced a map_flags on BPF_MAP_CREATE, which can disable
this preallocation again BPF_F_NO_PREALLOC.
Signed-off-by: Jesper Dangaard Brouer brouer@redhat.com