From: Christoph Hellwig <hch@lst.de>
To: Vlastimil Babka <vbabka@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Harry Yoo <harry.yoo@oracle.com>,
Eric Biggers <ebiggers@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: mempool_alloc_bulk and various mempool improvements
Date: Tue, 11 Nov 2025 14:52:28 +0100 [thread overview]
Message-ID: <20251111135300.752962-1-hch@lst.de> (raw)
Hi all,
this series adds a bulk version of mempool_alloc that makes allocating
multiple objects deadlock safe.
The initial users is the blk-crypto-fallback code:
https://lore.kernel.org/linux-block/20251031093517.1603379-1-hch@lst.de/
with which v1 was posted, but I also have a few other users in mind.
Changes since v1:
- fix build for !CONFIG_FAULT_INJECTION
- improve the kerneldoc comments further
- refactor the code so that the mempool_alloc fastpath does not
have to deal with arrays
- don't support !__GFP_DIRECT_RECLAIM for bulk allocations
- do poll allocations even if not all elements are available
- s/elem/elems/
- use a separate failure injection know for the bulk allocator
diffstat:
include/linux/fault-inject.h | 8 -
include/linux/mempool.h | 7
mm/mempool.c | 341 ++++++++++++++++++++++++++++---------------
3 files changed, 240 insertions(+), 116 deletions(-)
next reply other threads:[~2025-11-11 13:53 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-11 13:52 Christoph Hellwig [this message]
2025-11-11 13:52 ` [PATCH 1/7] fault-inject: make enum fault_flags available unconditionally Christoph Hellwig
2025-11-11 13:52 ` [PATCH 2/7] mempool: update kerneldoc comments Christoph Hellwig
2025-11-11 13:52 ` [PATCH 3/7] mempool: add error injection support Christoph Hellwig
2025-11-11 13:52 ` [PATCH 4/7] mempool: factor out a mempool_adjust_gfp helper Christoph Hellwig
2025-11-11 13:52 ` [PATCH 5/7] mempool: factor out a mempool_alloc_from_pool helper Christoph Hellwig
2025-11-11 13:52 ` [PATCH 6/7] mempool: fix a wakeup race when sleeping for elements Christoph Hellwig
2025-11-12 10:53 ` Vlastimil Babka
2025-11-12 15:38 ` Christoph Hellwig
2025-11-11 13:52 ` [PATCH 7/7] mempool: add mempool_{alloc,free}_bulk Christoph Hellwig
2025-11-12 12:20 ` Vlastimil Babka
2025-11-12 15:47 ` Christoph Hellwig
2025-11-12 15:56 ` Vlastimil Babka
2025-11-12 15:58 ` Christoph Hellwig
2025-11-12 12:22 ` mempool_alloc_bulk and various mempool improvements Vlastimil Babka
2025-11-12 15:50 ` Christoph Hellwig
2025-11-12 15:57 ` Vlastimil Babka
2025-11-12 17:34 ` Eric Biggers
2025-11-13 5:52 ` Christoph Hellwig
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