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acct(2): begin the deprecation of legacy BSD process accounting

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As Christian points out [1], even though it's privileged, this interface
has a lot of footguns. There are better options these days (e.g. eBPF),
so it would be good to start discouraging its use and mark it as
deprecated.

[1]: https://lore.kernel.org/linux-fsdevel/20250212-giert-spannend-8893f1eaba7d@brauner/

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260106-bsd-acct-v1-1-d15564b52c83@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Jeff Layton
2026-01-06 09:38:22 -05:00
committed by Christian Brauner
parent 6784f27472
commit 46329a9dd7
1 changed files with 5 additions and 2 deletions
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7
init/Kconfig
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@@ -624,8 +624,9 @@ config SCHED_HW_PRESSURE
arch_update_hw_pressure() and arch_scale_thermal_pressure().
config BSD_PROCESS_ACCT
bool "BSD Process Accounting"
bool "BSD Process Accounting (DEPRECATED)"
depends on MULTIUSER
default n
help
If you say Y here, a user level program will be able to instruct the
kernel (via a special system call) to write process accounting
@@ -635,7 +636,9 @@ config BSD_PROCESS_ACCT
command name, memory usage, controlling terminal etc. (the complete
list is in the struct acct in <file:include/linux/acct.h>). It is
up to the user level program to do useful things with this
information. This is generally a good idea, so say Y.
information. This mechanism is antiquated and has significant
scalability issues. You probably want to use eBPF instead. Say
N unless you really need this.
config BSD_PROCESS_ACCT_V3
bool "BSD Process Accounting version 3 file format"