x86/resctrl: Factor rdtgroup lock for multi-file ops

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rdtgroup_kn_lock_live() can only release a kernfs reference for a single
file before waiting on the rdtgroup_mutex, limiting its usefulness for
operations on multiple files, such as rename.

Factor the work needed to respectively break and unbreak active
protection on an individual file into rdtgroup_kn_{get,put}().

No functional change.

Signed-off-by: Peter Newman <peternewman@google.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lore.kernel.org/r/20230419125015.693566-2-peternewman@google.com

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Peter Newman 2023-04-19 14:50:13 +02:00 • committed by Borislav Petkov (AMD)

parent 2997d94b5d

commit c45c06d4ae

1 changed files with 22 additions and 13 deletions

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arch/x86/kernel/cpu/resctrl/rdtgroup.c

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