From: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>
To: Matthew Auld <matthew.auld@intel.com>,
Intel Graphics Development <intel-gfx@lists.freedesktop.org>
Subject: [Intel-gfx] Strange hugepages result?
Date: Thu, 10 Jun 2021 21:02:38 +0200 [thread overview]
Message-ID: <c9ea7221-cc54-3394-f664-3f819ecc6d06@linux.intel.com> (raw)
Hi, Matthew!
I got a funny result from the hugepages selftest when trying to break
out some functionality from shmem to make a ttm page pool for
cached-only TTM system bos.
It turns out that shmem computed the pagesizes using the underlying
pages rather than the dma segments, so when I changed that, hugepages
started failing.
https://patchwork.freedesktop.org/series/91227/
But when hacking the page-size computation to use the underlying pages,
it's fine again
https://patchwork.freedesktop.org/series/91336/
It seems like some assumption about huge dma segments is wrong, either
in our page-size calculation, in the selftest or in the actual huge page
setup. Could it be that huge sized segments are assumed to be properly
aligned?
/Thomas
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next reply other threads:[~2021-06-10 19:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 19:02 Thomas Hellström [this message]
2021-06-10 19:57 ` [Intel-gfx] Strange hugepages result? Matthew Auld
2021-06-11 5:44 ` Thomas Hellström
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=c9ea7221-cc54-3394-f664-3f819ecc6d06@linux.intel.com \
--to=thomas.hellstrom@linux.intel.com \
--cc=intel-gfx@lists.freedesktop.org \
--cc=matthew.auld@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.