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| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2025-12-15 08:47:11 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-01-21 06:24:38 +0300 |
| commit | 2e8ff2f51dde73a26b94aed2df4827177bd25e6e (patch) | |
| tree | 91e6aa284095f3088d1e8290132618b2c8d295fe /include/linux | |
| parent | 0327a862135b0b0b5e67f1434468326b733562bf (diff) | |
| download | linux-2e8ff2f51dde73a26b94aed2df4827177bd25e6e.tar.xz | |
zram: use u32 for entry ac_time tracking
We can reduce sizeof(zram_table_entry) on 64-bit systems by converting
flags and ac_time to u32. Entry flags fit into u32, and for ac_time u32
gives us over a century of entry lifespan (approx 136 years) which is
plenty (zram uses system boot time (seconds)).
In struct zram_table_entry we use bytes aliasing, because bit-wait API
(for slot lock) requires a whole unsigned long word.
Link: https://lkml.kernel.org/r/d7c0b48450c70eeb5fd8acd6ecd23593f30dbf1f.1765775954.git.senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Suggested-by: David Stevens <stevensd@google.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: Minchan Kim <minchan@google.com>
Cc: Richard Chang <richardycc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions