From: Jens Axboe <axboe@kernel.dk>
To: Christoph Hellwig <hch@lst.de>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
linux-block@vger.kernel.org
Subject: Re: make block layer auto-PI deadlock safe v3
Date: Tue, 4 Nov 2025 12:47:09 -0700 [thread overview]
Message-ID: <afe10b17-245b-4b21-81ee-ff5589a7ca47@kernel.dk> (raw)
In-Reply-To: <20251103101653.2083310-1-hch@lst.de>
On 11/3/25 3:16 AM, Christoph Hellwig wrote:
> Hi all,
>
> currently the automatic block layer PI generation allocates the integrity
> buffer using kmalloc, and thus could deadlock, or fail I/O request due
> to memory pressure.
>
> Fix this by adding a mempool, and capping the maximum I/O size on PI
> capable devices to not exceed the allocation size of the mempool.
>
> This is against the block-6.18 branch as it has a contextual dependency
> on the PI fix merged there yesterday.
Yesterday? Guessing this got copy/pasted from the v1 posting, as it must
be this one:
commit 4c8cf6bd28d6fea23819f082ddc8063fd6fa963a (tag: block-6.18-20251023)
Author: Christoph Hellwig <hch@lst.de>
Date: Wed Oct 22 10:33:31 2025 +0200
block: require LBA dma_alignment when using PI
which is a bit longer ago.
But why? Surely this is 6.19 material?
--
Jens Axboe
next prev parent reply other threads:[~2025-11-04 19:47 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-03 10:16 make block layer auto-PI deadlock safe v3 Christoph Hellwig
2025-11-03 10:16 ` [PATCH 1/2] block: blocking mempool_alloc doesn't fail Christoph Hellwig
2025-11-03 11:16 ` Kanchan Joshi
2025-11-03 11:26 ` John Garry
2025-11-03 11:52 ` Christoph Hellwig
2025-11-03 13:20 ` Anuj gupta
2025-11-03 13:28 ` Johannes Thumshirn
2025-11-03 10:16 ` [PATCH 2/2] block: make bio auto-integrity deadlock safe Christoph Hellwig
2025-11-03 11:15 ` Kanchan Joshi
2025-11-03 13:20 ` Anuj gupta
2025-11-03 13:40 ` Johannes Thumshirn
2025-11-03 13:45 ` hch
2025-11-03 13:47 ` Johannes Thumshirn
2025-11-03 13:49 ` hch
2025-11-04 19:47 ` Jens Axboe [this message]
2025-11-05 13:23 ` make block layer auto-PI deadlock safe v3 Christoph Hellwig
2025-11-05 15:03 ` Jens Axboe
2025-11-05 19:46 ` Christoph Hellwig
2025-11-05 19:48 ` Jens Axboe
2025-11-05 15:06 ` Jens Axboe
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