From: David Vrabel <david.vrabel@citrix.com> To: Andrew Morton <akpm@linux-foundation.org>, <linux-kernel@vger.kernel.org> Cc: David Vrabel <david.vrabel@citrix.com>, <linux-mm@kvack.org> Subject: [PATCHv3 0/2] mm: infrastructure for correctly handling foreign pages on Xen Date: Mon, 19 Jan 2015 15:47:21 +0000 [thread overview] Message-ID: <1421682443-20509-1-git-send-email-david.vrabel@citrix.com> (raw) These two patches are the common parts of a larger Xen series[1] fixing several long-standing bugs the handling of foreign[2] pages in Xen guests. Andrew, these are best merged via the Xen tree. Can I have an acked-by? The first patch is required to fix get_user_pages[_fast]() with userspace space mappings of such foreign pages. Basically, pte_page() doesn't work so an alternate mechanism is needed to get the page from a VMA and address. By requiring mappings needing this method are 'special' this should not have an impact on the common use cases. The second patch isn't essential but helps with readability of the resulting user of the page flag. For further background reading see: http://xenbits.xen.org/people/dvrabel/grant-improvements-C.pdf Changes in v3: - find_page renamed to find_special_page. - added documentation. Changes in v2: - Add a find_page VMA op instead of the pages field so: a) the size of struct vm_area_struct does not increase; and b) the common code need not handling splitting the pages area. David [1] http://lists.xen.org/archives/html/xen-devel/2015-01/msg00979.html [2] Another guest's page temporarily granted to this guest.
WARNING: multiple messages have this Message-ID (diff)
From: David Vrabel <david.vrabel@citrix.com> To: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org Cc: David Vrabel <david.vrabel@citrix.com>, linux-mm@kvack.org Subject: [PATCHv3 0/2] mm: infrastructure for correctly handling foreign pages on Xen Date: Mon, 19 Jan 2015 15:47:21 +0000 [thread overview] Message-ID: <1421682443-20509-1-git-send-email-david.vrabel@citrix.com> (raw) These two patches are the common parts of a larger Xen series[1] fixing several long-standing bugs the handling of foreign[2] pages in Xen guests. Andrew, these are best merged via the Xen tree. Can I have an acked-by? The first patch is required to fix get_user_pages[_fast]() with userspace space mappings of such foreign pages. Basically, pte_page() doesn't work so an alternate mechanism is needed to get the page from a VMA and address. By requiring mappings needing this method are 'special' this should not have an impact on the common use cases. The second patch isn't essential but helps with readability of the resulting user of the page flag. For further background reading see: http://xenbits.xen.org/people/dvrabel/grant-improvements-C.pdf Changes in v3: - find_page renamed to find_special_page. - added documentation. Changes in v2: - Add a find_page VMA op instead of the pages field so: a) the size of struct vm_area_struct does not increase; and b) the common code need not handling splitting the pages area. David [1] http://lists.xen.org/archives/html/xen-devel/2015-01/msg00979.html [2] Another guest's page temporarily granted to this guest. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2015-01-19 15:47 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-01-19 15:47 David Vrabel [this message] 2015-01-19 15:47 ` [PATCHv3 0/2] mm: infrastructure for correctly handling foreign pages on Xen David Vrabel 2015-01-19 15:47 ` [PATCH 1/2] mm: provide a find_special_page vma operation David Vrabel 2015-01-19 15:47 ` David Vrabel 2015-01-23 0:06 ` Andrew Morton 2015-01-23 0:06 ` Andrew Morton 2015-01-19 15:47 ` [PATCH 2/2] mm: add 'foreign' alias for the 'pinned' page flag David Vrabel 2015-01-19 15:47 ` David Vrabel 2015-01-23 0:06 ` Andrew Morton 2015-01-23 0:06 ` Andrew Morton
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=1421682443-20509-1-git-send-email-david.vrabel@citrix.com \ --to=david.vrabel@citrix.com \ --cc=akpm@linux-foundation.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mm@kvack.org \ /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: linkBe 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.