From: Oleg Nesterov <oleg@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Andi Kleen <andi@firstfloor.org>, Borislav Petkov <bp@alien8.de>,
Hugh Dickins <hughd@google.com>, Ingo Molnar <mingo@kernel.org>,
Jiri Kosina <jkosina@suse.cz>,
Peter Zijlstra <peterz@infradead.org>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/1] uprobes: Kill __replace_page(), change uprobe_write_opcode() to rely on gup(WRITE)
Date: Tue, 10 Dec 2013 21:16:50 +0100 [thread overview]
Message-ID: <20131210201650.GA679@redhat.com> (raw)
In-Reply-To: <20131210200426.GA31862@redhat.com>
On 12/10, Oleg Nesterov wrote:
>
> On 12/10, Linus Torvalds wrote:
> >
> > We'd be *much* better off using get_user_pages_fast() if possible -
> > and I bet _is_ possible in 99% of all cases.
>
> We can't. get_user_pages_fast() takes mmap_sem.
Hmm. I am stupid, there is __get_user_pages_fast(). OK, I'll try
to think more.
Oleg.
next prev parent reply other threads:[~2013-12-10 20:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-09 21:18 [PATCH 0/1] uprobes: Kill __replace_page(), change uprobe_write_opcode() to rely on gup(WRITE) Oleg Nesterov
2013-12-09 21:18 ` [PATCH 1/1] " Oleg Nesterov
2013-12-10 2:08 ` [PATCH 0/1] " Linus Torvalds
2013-12-10 19:18 ` Oleg Nesterov
2013-12-10 19:38 ` Linus Torvalds
2013-12-10 20:04 ` Oleg Nesterov
2013-12-10 20:16 ` Linus Torvalds
2013-12-10 21:24 ` Oleg Nesterov
2013-12-10 20:16 ` Oleg Nesterov [this message]
2013-12-10 20:19 ` Linus Torvalds
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