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authorLinus Torvalds <[email protected]>2023-05-19 16:07:38 -0700
committerSteven Rostedt (Google) <[email protected]>2023-05-23 20:58:17 -0400
commit3e0fea09b17fa2255f6cb0108bbffd4a505f8925 (patch)
tree6f5e1342c91b850d3853e1d9eaa0516bfbb807ff /tools/net/ynl/generated/netdev-user.c
parent632478a05821bc1c9b55c3a1dd0fb1be7bfa1acc (diff)
tracing/user_events: Split up mm alloc and attach
When a new mm is being created in a fork() path it currently is allocated and then attached in one go. This leaves the mm exposed out to the tracing register callbacks while any parent enabler locations are copied in. This should not happen. Split up mm alloc and attach as unique operations. When duplicating enablers, first alloc, then duplicate, and only upon success, attach. This prevents any timing window outside of the event_reg mutex for enablement walking. This allows for dropping RCU requirement for enablement walking in later patches. Link: https://lkml.kernel.org/r/[email protected] Link: https://lore.kernel.org/linux-trace-kernel/CAHk-=whTBvXJuoi_kACo3qi5WZUmRrhyA-_=rRFsycTytmB6qw@mail.gmail.com/ Signed-off-by: Linus Torvalds <[email protected]> [ change log written by Beau Belgrave ] Signed-off-by: Beau Belgrave <[email protected]> Signed-off-by: Steven Rostedt (Google) <[email protected]>
Diffstat (limited to 'tools/net/ynl/generated/netdev-user.c')
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