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| author | Mikulas Patocka <mpatocka@redhat.com> | 2023-06-26 16:46:00 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2023-06-27 16:02:18 -0400 |
| commit | da8b4fc1f63a01a0eca9338ae338b804c437b51f (patch) | |
| tree | d4b671cee1d6c6e28a52a760d6757d9deaa1319c /mm/shrinker_debug.c | |
| parent | 6d50eb4725934fd22f5eeccb401000687c790fd0 (diff) | |
| download | lwn-da8b4fc1f63a01a0eca9338ae338b804c437b51f.tar.gz lwn-da8b4fc1f63a01a0eca9338ae338b804c437b51f.zip | |
dm integrity: only allocate recalculate buffer when needed
dm-integrity preallocated 8MiB buffer for recalculating in the
constructor and freed it in the destructor. This wastes memory when
the user has many dm-integrity devices.
Fix dm-integrity so that the buffer is only allocated when
recalculation is in progress; allocate the buffer at the beginning of
integrity_recalc() and free it at the end.
Note that integrity_recalc() doesn't hold any locks when allocating
the buffer, so it shouldn't cause low-memory deadlock.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'mm/shrinker_debug.c')
0 files changed, 0 insertions, 0 deletions