From: Gerd Hoffmann <kraxel@redhat.com>
To: Vivek Kasireddy <vivek.kasireddy@intel.com>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] udmabuf: Add support for mapping hugepages (v2)
Date: Fri, 4 Jun 2021 07:59:03 +0200 [thread overview]
Message-ID: <20210604055903.g2bp4vuay2555omg@sirius.home.kraxel.org> (raw)
In-Reply-To: <20210603235955.341043-1-vivek.kasireddy@intel.com>
Hi,
> for (pgidx = 0; pgidx < pgcnt; pgidx++) {
> + if (is_file_hugepages(memfd)) {
> + hpage = find_get_page_flags(
> + file_inode(memfd)->i_mapping,
> + pgoff, FGP_ACCESSED);
> + if (IS_ERR(hpage)) {
> + ret = PTR_ERR(hpage);
> + goto err;
> + }
> +
> + page = hpage + (subpgoff % maxsubpgs);
> + get_page(page);
> + put_page(hpage);
if (hpage && subpgoff == maxsubpgs) {
put_page(hpage);
hpage = NULL;
}
if (!hpage) {
hpage = find_get_page_flags(...)
[ ... ]
}
Only lookup the huge page when you cross a hugepage border.
take care,
Gerd
next prev parent reply other threads:[~2021-06-04 5:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-03 8:52 [PATCH] udmabuf: Add support for mapping hugepages Vivek Kasireddy
2021-06-03 9:44 ` Gerd Hoffmann
2021-06-03 23:59 ` [PATCH] udmabuf: Add support for mapping hugepages (v2) Vivek Kasireddy
2021-06-04 5:59 ` Gerd Hoffmann [this message]
2021-06-04 20:59 ` [PATCH] udmabuf: Add support for mapping hugepages (v3) Vivek Kasireddy
2021-06-08 17:35 ` Dongwon Kim
2021-06-09 6:11 ` Gerd Hoffmann
2021-06-09 6:56 ` Gerd Hoffmann
2021-06-09 18:29 ` [PATCH] udmabuf: Add support for mapping hugepages (v4) Vivek Kasireddy
2021-06-10 6:01 ` Gerd Hoffmann
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