From: Andi Kleen <andi@firstfloor.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andy Lutomirski <luto@amacapital.net>,
Andrew Morton <akpm@linux-foundation.org>,
Denys Vlasenko <dvlasenk@redhat.com>,
Brian Gerst <brgerst@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Waiman Long <Waiman.Long@hp.com>
Subject: Re: why do we need vmalloc_sync_all?
Date: Sun, 14 Jun 2015 19:47:11 -0700 [thread overview]
Message-ID: <87bnghit74.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <20150614200623.GB19582@redhat.com> (Oleg Nesterov's message of "Sun, 14 Jun 2015 22:06:23 +0200")
Oleg Nesterov <oleg@redhat.com> writes:
>
> But again, the kernel no longer does this? do_page_fault() does vmalloc_fault()
> without notify_die(). If it fails, I do not see how/why a modular DIE_OOPS
> handler could try to resolve this problem and trigger another fault.
The same problem can happen from NMI handlers or machine check
handlers. It's not necessarily tied to page faults only.
-Andi
--
ak@linux.intel.com -- Speaking for myself only
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next prev parent reply other threads:[~2015-06-15 2:47 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-13 9:49 [PATCH 00/12, v2] x86/mm: Implement lockless pgd_alloc()/pgd_free() Ingo Molnar
2015-06-13 9:49 ` [PATCH 01/12] x86/mm/pat: Don't free PGD entries on memory unmap Ingo Molnar
2015-06-13 9:49 ` [PATCH 02/12] x86/mm/hotplug: Remove pgd_list use from the memory hotplug code Ingo Molnar
2015-06-13 19:24 ` Oleg Nesterov
2015-06-14 7:36 ` Ingo Molnar
2015-06-14 19:24 ` Oleg Nesterov
2015-06-14 19:38 ` Oleg Nesterov
2015-06-15 0:40 ` Paul E. McKenney
2015-06-15 20:33 ` Ingo Molnar
2015-06-13 9:49 ` [PATCH 03/12] x86/mm/hotplug: Don't remove PGD entries in remove_pagetable() Ingo Molnar
2015-06-13 9:49 ` [PATCH 04/12] x86/mm/hotplug: Simplify sync_global_pgds() Ingo Molnar
2015-06-13 9:49 ` [PATCH 05/12] mm: Introduce arch_pgd_init_late() Ingo Molnar
2015-06-13 9:49 ` [PATCH 06/12] x86/mm: Enable and use the arch_pgd_init_late() method Ingo Molnar
2015-06-13 9:49 ` [PATCH 07/12] x86/virt/guest/xen: Remove use of pgd_list from the Xen guest code Ingo Molnar
2015-06-14 8:26 ` Ingo Molnar
2015-06-15 9:05 ` Ian Campbell
2015-06-15 10:30 ` David Vrabel
2015-06-15 20:35 ` Ingo Molnar
2015-06-16 14:15 ` David Vrabel
2015-06-16 14:19 ` Boris Ostrovsky
2015-06-16 14:27 ` David Vrabel
2015-06-13 9:49 ` [PATCH 08/12] x86/mm: Remove pgd_list use from vmalloc_sync_all() Ingo Molnar
2015-06-13 9:49 ` [PATCH 09/12] x86/mm/pat/32: Remove pgd_list use from the PAT code Ingo Molnar
2015-06-13 9:49 ` [PATCH 10/12] x86/mm: Make pgd_alloc()/pgd_free() lockless Ingo Molnar
2015-06-13 9:49 ` [PATCH 11/12] x86/mm: Remove pgd_list leftovers Ingo Molnar
2015-06-13 9:49 ` [PATCH 12/12] x86/mm: Simplify pgd_alloc() Ingo Molnar
2015-06-13 18:58 ` why do we need vmalloc_sync_all? Oleg Nesterov
2015-06-14 7:59 ` Ingo Molnar
2015-06-14 20:06 ` Oleg Nesterov
2015-06-15 2:47 ` Andi Kleen [this message]
2015-06-15 2:57 ` Andy Lutomirski
2015-06-15 20:28 ` Ingo Molnar
2015-06-15 20:48 ` Andy Lutomirski
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