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| author | Michael S. Tsirkin <mst@redhat.com> | 2024-10-02 16:35:20 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-10-07 18:47:55 +0300 |
| commit | a194c985973276b2f280428c848f20369bb83734 (patch) | |
| tree | b7f027a729a11184b7a3e5814937349f4a82f241 /tools/perf/scripts/python/stackcollapse.py | |
| parent | b9efbe2b8f0177fa97bfab290d60858900aa196b (diff) | |
| download | linux-a194c985973276b2f280428c848f20369bb83734.tar.xz | |
vsock/virtio: use GFP_ATOMIC under RCU read lock
virtio_transport_send_pkt in now called on transport fast path,
under RCU read lock. In that case, we have a bug: virtio_add_sgs
is called with GFP_KERNEL, and might sleep.
Pass the gfp flags as an argument, and use GFP_ATOMIC on
the fast path.
Link: https://lore.kernel.org/all/hfcr2aget2zojmqpr4uhlzvnep4vgskblx5b6xf2ddosbsrke7@nt34bxgp7j2x
Fixes: efcd71af38be ("vsock/virtio: avoid queuing packets when intermediate queue is empty")
Reported-by: Christian Brauner <brauner@kernel.org>
Cc: Stefano Garzarella <sgarzare@redhat.com>
Cc: Luigi Leonardi <luigi.leonardi@outlook.com>
Message-ID: <3fbfb6e871f625f89eb578c7228e127437b1975a.1727876449.git.mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Luigi Leonardi <luigi.leonardi@outlook.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions