diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2023-05-25 14:57:07 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-09 16:25:41 -0700 |
| commit | 43d7650234c62201ba3ca5b731226b0b189989a8 (patch) | |
| tree | 39e61f957966f409b0010dc8c80ea026f975dcc5 /ipc/msgutil.c | |
| parent | a09fad96ffb1d0da007283727235a03b813f989b (diff) | |
mm/vmalloc: check free space in vmap_block lockless
vb_alloc() unconditionally locks a vmap_block on the free list to check
the free space.
This can be done locklessly because vmap_block::free never increases, it's
only decreased on allocations.
Check the free space lockless and only if that succeeds, recheck under the
lock.
Link: https://lkml.kernel.org/r/20230525124504.750481992@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Lorenzo Stoakes <lstoakes@gmail.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'ipc/msgutil.c')
0 files changed, 0 insertions, 0 deletions