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| author | David Howells <dhowells@redhat.com> | 2024-12-04 07:46:45 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-12-09 13:48:27 -0800 |
| commit | 6396b48ac0a77165f9c2c40ab03d6c8188c89739 (patch) | |
| tree | 7d9d87eb371563b07799f2ae8b571786537c3157 /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | rxrpc: Timestamp DATA packets before transmitting them (diff) | |
| download | linux-6396b48ac0a77165f9c2c40ab03d6c8188c89739.tar.gz linux-6396b48ac0a77165f9c2c40ab03d6c8188c89739.zip | |
rxrpc: Don't need barrier for ->tx_bottom and ->acks_hard_ack
We don't need a barrier for the ->tx_bottom value (which indicates the
lowest sequence still in the transmission queue) and the ->acks_hard_ack
value (which tracks the DATA packets hard-ack'd by the latest ACK packet
received and thus indicates which DATA packets can now be discarded) as the
app thread doesn't use either value as a reference to memory to access.
Rather, the app thread merely uses these as a guide to how much space is
available in the transmission queue
Change the code to use READ/WRITE_ONCE() instead.
Also, change rxrpc_check_tx_space() to use the same value for tx_bottom
throughout.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20241204074710.990092-18-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions