summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
diff options
context:
space:
mode:
authorJulian Anastasov <ja@ssi.bg>2017-02-06 23:14:17 +0200
committerDavid S. Miller <davem@davemloft.net>2017-02-07 13:07:47 -0500
commit51ce8bd4d17a761e1a90a34a1b5c9b762cce7553 (patch)
treeb009850c5a2e7c633a94eeacb71a25f91b4b64f0 /tools/testing/selftests/powerpc/pmu/ebb/ebb.c
parent0dec879f636f11b0ffda1cb5fd96a1754c59ead3 (diff)
net: pending_confirm is not used anymore
When same struct dst_entry can be used for many different neighbours we can not use it for pending confirmations. As last step, we can remove the pending_confirm flag. Reported-by: YueHaibing <yuehaibing@huawei.com> Fixes: 5110effee8fd ("net: Do delayed neigh confirmation.") Fixes: f2bb4bedf35d ("ipv4: Cache output routes in fib_info nexthops.") Signed-off-by: Julian Anastasov <ja@ssi.bg> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/powerpc/pmu/ebb/ebb.c')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-02-11 19:53:52 +0000
esses at least BTRFS_DELAYED_BATCH items (if they are present in the list). So, the machinery works as expected while the list is almost empty. As soon as it is getting bigger, worker func starts to process more than one item at a time, it takes longer, and the chances to have async_works queued more than needed is getting higher. The problem above is worsened by another flaw of delayed-inode implementation: if async_work was queued in a throttling branch (number of items >= BTRFS_DELAYED_WRITEBACK), corresponding worker func won't quit until the number of items < BTRFS_DELAYED_BACKGROUND / 2. So, it is possible that the func occupies CPU infinitely (up to 30sec in my experiments): while the func is trying to drain the list, the user activity may add more and more items to the list. The patch fixes both problems in straightforward way: refuse queuing too many works in btrfs_wq_run_delayed_node and bail out of worker func if at least BTRFS_DELAYED_WRITEBACK items are processed. Changed in v2: remove support of thresh == NO_THRESHOLD. Signed-off-by: Maxim Patlasov <mpatlasov@virtuozzo.com> Signed-off-by: Chris Mason <clm@fb.com> Cc: stable@vger.kernel.org # v3.15+
Diffstat (limited to 'include/trace/events')