From: Jason Gunthorpe <jgg@nvidia.com>
To: Leon Romanovsky <leon@kernel.org>
Cc: Michael Margolin <mrgolin@amazon.com>,
linux-rdma@vger.kernel.org, sleybo@amazon.com, matua@amazon.com,
gal.pressman@linux.dev, Firas Jahjah <firasj@amazon.com>,
Yonatan Nachum <ynachum@amazon.com>
Subject: Re: [PATCH for-next] RDMA/efa: Use __GFP_RETRY_MAYFAIL for ring allocations
Date: Wed, 23 Sep 2026 08:57:55 -0300 [thread overview]
Message-ID: <20260923115755.GE2545495@nvidia.com> (raw)
In-Reply-To: <20260923105127.GP563127@unreal>
On Wed, Sep 23, 2026 at 01:51:27PM +0300, Leon Romanovsky wrote:
> On Thu, Sep 17, 2026 at 10:51:01AM +0000, Michael Margolin wrote:
> > RQ and CQ ring buffers require physically contiguous memory. On
> > systems under memory pressure, high-order allocations can fail
> > even when sufficient free memory exists because the allocator
> > gives up after a single reclaim and compaction attempt for
> > costly-order requests that lack __GFP_RETRY_MAYFAIL.
>
> What sizes did you see fail, and in which flow?
.. and many other drivers has spent alot of effort not having high
order allocations like this because they just don't work.
Jason
next prev parent reply other threads:[~2026-09-23 11:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-17 10:51 [PATCH for-next] RDMA/efa: Use __GFP_RETRY_MAYFAIL for ring allocations Michael Margolin
2026-09-17 10:58 ` sashiko-bot
2026-09-23 10:51 ` Leon Romanovsky
2026-09-23 11:57 ` Jason Gunthorpe [this message]
2026-09-23 13:58 ` Michael Margolin
2026-09-28 18:27 ` Jason Gunthorpe
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