From: Jason Gunthorpe <jgg@ziepe.ca>
To: jane.chu@oracle.com
Cc: logane@deltatee.com, hch@lst.de, gregkh@linuxfoundation.org,
willy@infradead.org, kch@nvidia.com, axboe@kernel.dk,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-pci@vger.kernel.org, linux-nvme@lists.infradead.org,
linux-block@vger.kernel.org
Subject: Re: Report: Performance regression from ib_umem_get on zone device pages
Date: Tue, 29 Apr 2025 09:29:56 -0300 [thread overview]
Message-ID: <20250429122956.GB2260621@ziepe.ca> (raw)
In-Reply-To: <bab1c156-ed5a-4c1d-8f0a-dd1e39e17c99@oracle.com>
On Mon, Apr 28, 2025 at 12:11:40PM -0700, jane.chu@oracle.com wrote:
> 6.15-rc3 is orders of magnitude better.
> Agreed that device-dax's using folio are likely the heros. I've yet to check
> the code and bisect, maybe pin_user_page_fast() adds folios to page_list[]
> instead of 4K pages?
It does not.
I think a bisection would be interesting information
Jason
prev parent reply other threads:[~2025-04-29 12:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-23 19:21 jane.chu
2025-04-23 19:34 ` Resend: " jane.chu
2025-04-23 23:28 ` Jason Gunthorpe
2025-04-24 1:49 ` jane.chu
2025-04-24 2:55 ` jane.chu
2025-04-24 3:00 ` jane.chu
2025-04-24 5:35 ` jane.chu
2025-04-24 12:01 ` Jason Gunthorpe
2025-04-28 19:11 ` jane.chu
2025-04-29 12:29 ` Jason Gunthorpe [this message]
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