On 05/03/2015 10:55 PM, Juergen Gross wrote:
> I did a small measurement of the pure locking functions on bare metal
> without and with my patches.
>
> spin_lock() for the first time (lock and code not in cache) dropped from
> about 600 to 500 cycles.
>
> spin_unlock() for first time dropped from
On 05/03/2015 10:55 PM, Juergen Gross wrote:
I did a small measurement of the pure locking functions on bare metal
without and with my patches.
spin_lock() for the first time (lock and code not in cache) dropped from
about 600 to 500 cycles.
spin_unlock() for first time dropped from 145 to
On 04/30/2015 03:53 AM, Juergen Gross wrote:
> Paravirtualized spinlocks produce some overhead even if the kernel is
> running on bare metal. The main reason are the more complex locking
> and unlocking functions. Especially unlocking is no longer just one
> instruction but so complex that it is
On 04/30/2015 03:53 AM, Juergen Gross wrote:
Paravirtualized spinlocks produce some overhead even if the kernel is
running on bare metal. The main reason are the more complex locking
and unlocking functions. Especially unlocking is no longer just one
instruction but so complex that it is no
On 02/11/2015 09:24 AM, Oleg Nesterov wrote:
> I agree, and I have to admit I am not sure I fully understand why
> unlock uses the locked add. Except we need a barrier to avoid the race
> with the enter_slowpath() users, of course. Perhaps this is the only
> reason?
Right now it needs to be a
On 02/11/2015 09:24 AM, Oleg Nesterov wrote:
I agree, and I have to admit I am not sure I fully understand why
unlock uses the locked add. Except we need a barrier to avoid the race
with the enter_slowpath() users, of course. Perhaps this is the only
reason?
Right now it needs to be a locked
On 02/10/2015 05:26 AM, Oleg Nesterov wrote:
> On 02/10, Raghavendra K T wrote:
>> On 02/10/2015 06:23 AM, Linus Torvalds wrote:
>>
>>> add_smp(>tickets.head, TICKET_LOCK_INC);
>>> if (READ_ONCE(lock->tickets.tail) & TICKET_SLOWPATH_FLAG) ..
>>>
>>> into something like
>>>
>>>
On 02/10/2015 05:26 AM, Oleg Nesterov wrote:
On 02/10, Raghavendra K T wrote:
On 02/10/2015 06:23 AM, Linus Torvalds wrote:
add_smp(lock-tickets.head, TICKET_LOCK_INC);
if (READ_ONCE(lock-tickets.tail) TICKET_SLOWPATH_FLAG) ..
into something like
val =
On 02/06/2015 06:49 AM, Raghavendra K T wrote:
> Paravirt spinlock clears slowpath flag after doing unlock.
> As explained by Linus currently it does:
> prev = *lock;
> add_smp(>tickets.head, TICKET_LOCK_INC);
>
> /* add_smp() is a full mb() */
>
>
On 02/06/2015 06:49 AM, Raghavendra K T wrote:
Paravirt spinlock clears slowpath flag after doing unlock.
As explained by Linus currently it does:
prev = *lock;
add_smp(lock-tickets.head, TICKET_LOCK_INC);
/* add_smp() is a full mb() */
On 08/05/2013 11:05 AM, Konrad Rzeszutek Wilk wrote:
> Jeremy has been a key person in making Linux work with Xen.
> He has been enjoying the last year working on something
> different so reflect that in the maintainers file.
Ack.
J
>
> CC: Jeremy Fitzhardinge
> Sig
On 08/13/2013 01:02 PM, Raghavendra K T wrote:
> * Ingo Molnar [2013-08-13 18:55:52]:
>
>> Would be nice to have a delta fix patch against tip:x86/spinlocks, which
>> I'll then backmerge into that series via rebasing it.
>>
> There was a namespace collision of PER_CPU lock_waiting variable when
On 08/13/2013 01:02 PM, Raghavendra K T wrote:
* Ingo Molnar mi...@kernel.org [2013-08-13 18:55:52]:
Would be nice to have a delta fix patch against tip:x86/spinlocks, which
I'll then backmerge into that series via rebasing it.
There was a namespace collision of PER_CPU lock_waiting
On 08/05/2013 11:05 AM, Konrad Rzeszutek Wilk wrote:
Jeremy has been a key person in making Linux work with Xen.
He has been enjoying the last year working on something
different so reflect that in the maintainers file.
Ack.
J
CC: Jeremy Fitzhardinge jer...@goop.org
Signed-off
Commit-ID: 545ac13892ab391049a92108cf59a0d05de7e28c
Gitweb: http://git.kernel.org/tip/545ac13892ab391049a92108cf59a0d05de7e28c
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:49 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:53:05 -0700
x86, spinlock
Commit-ID: 4a1ed4ca681e7df38ed1b609a11aab38cbc515b3
Gitweb: http://git.kernel.org/tip/4a1ed4ca681e7df38ed1b609a11aab38cbc515b3
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:56 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:53:50 -0700
x86, pvticketlock
Commit-ID: bf7aab3ad4b4364a293421d628a912a2153ee1ee
Gitweb: http://git.kernel.org/tip/bf7aab3ad4b4364a293421d628a912a2153ee1ee
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:52 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:53:18 -0700
xen: Defer
Commit-ID: 1ed7bf5f5227169b661c619636f754b98001ec30
Gitweb: http://git.kernel.org/tip/1ed7bf5f5227169b661c619636f754b98001ec30
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:59 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:54:03 -0700
xen, pvticketlock
Commit-ID: b8fa70b51aa76737bdb6b493901ef7376977489c
Gitweb: http://git.kernel.org/tip/b8fa70b51aa76737bdb6b493901ef7376977489c
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:54 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:53:37 -0700
xen, pvticketlocks
Commit-ID: 354714dd2607778692db53947ab93b74956494e5
Gitweb: http://git.kernel.org/tip/354714dd2607778692db53947ab93b74956494e5
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:55 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:53:44 -0700
x86, pvticketlock
Commit-ID: 80bd58fef495d000a02fc5b55ca76d423400e748
Gitweb: http://git.kernel.org/tip/80bd58fef495d000a02fc5b55ca76d423400e748
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:53 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:53:23 -0700
xen, pvticketlock
Commit-ID: 96f853eaa889c7a22718d275b0df7bebdbd6780e
Gitweb: http://git.kernel.org/tip/96f853eaa889c7a22718d275b0df7bebdbd6780e
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:58 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:54:00 -0700
x86, ticketlock
Commit-ID: b798df09f919c52823110a74bd568c6a4e98e6b2
Gitweb: http://git.kernel.org/tip/b798df09f919c52823110a74bd568c6a4e98e6b2
Author: Jeremy Fitzhardinge
AuthorDate: Fri, 9 Aug 2013 19:51:51 +0530
Committer: H. Peter Anvin
CommitDate: Fri, 9 Aug 2013 07:53:14 -0700
x86, ticketlock
Commit-ID: b8fa70b51aa76737bdb6b493901ef7376977489c
Gitweb: http://git.kernel.org/tip/b8fa70b51aa76737bdb6b493901ef7376977489c
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:54 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: 354714dd2607778692db53947ab93b74956494e5
Gitweb: http://git.kernel.org/tip/354714dd2607778692db53947ab93b74956494e5
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:55 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: 80bd58fef495d000a02fc5b55ca76d423400e748
Gitweb: http://git.kernel.org/tip/80bd58fef495d000a02fc5b55ca76d423400e748
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:53 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: 96f853eaa889c7a22718d275b0df7bebdbd6780e
Gitweb: http://git.kernel.org/tip/96f853eaa889c7a22718d275b0df7bebdbd6780e
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:58 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: b798df09f919c52823110a74bd568c6a4e98e6b2
Gitweb: http://git.kernel.org/tip/b798df09f919c52823110a74bd568c6a4e98e6b2
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:51 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: 1ed7bf5f5227169b661c619636f754b98001ec30
Gitweb: http://git.kernel.org/tip/1ed7bf5f5227169b661c619636f754b98001ec30
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:59 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: 4a1ed4ca681e7df38ed1b609a11aab38cbc515b3
Gitweb: http://git.kernel.org/tip/4a1ed4ca681e7df38ed1b609a11aab38cbc515b3
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:56 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: bf7aab3ad4b4364a293421d628a912a2153ee1ee
Gitweb: http://git.kernel.org/tip/bf7aab3ad4b4364a293421d628a912a2153ee1ee
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:52 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: 545ac13892ab391049a92108cf59a0d05de7e28c
Gitweb: http://git.kernel.org/tip/545ac13892ab391049a92108cf59a0d05de7e28c
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Fri, 9 Aug 2013 19:51:49 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Fri, 9 Aug 2013
Commit-ID: 38eddb85894561ab32c1de4171e1c1582f0efa78
Gitweb: http://git.kernel.org/tip/38eddb85894561ab32c1de4171e1c1582f0efa78
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:14:12 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:07:01 -0700
xen, pvticketlock
Commit-ID: faf5f87c305fc58464bf8c47d0a5d148ceee2e32
Gitweb: http://git.kernel.org/tip/faf5f87c305fc58464bf8c47d0a5d148ceee2e32
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:13:52 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:06:58 -0700
x86, ticketlock
Commit-ID: 00de643f44ed84156e18f8b9afa8613d3b37a298
Gitweb: http://git.kernel.org/tip/00de643f44ed84156e18f8b9afa8613d3b37a298
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:13:13 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:06:50 -0700
x86, pvticketlock
Commit-ID: 26dca1a3262c451846537d8c1f3f56290718b7d4
Gitweb: http://git.kernel.org/tip/26dca1a3262c451846537d8c1f3f56290718b7d4
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:11:45 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:06:34 -0700
xen: Defer
Commit-ID: c1230bf0bf6c93ff2db93ba0b66839068f498e8b
Gitweb: http://git.kernel.org/tip/c1230bf0bf6c93ff2db93ba0b66839068f498e8b
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:11:20 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:06:30 -0700
x86, ticketlock
Commit-ID: 9f091fd2047dc4f9cc512e88f818786274fa646f
Gitweb: http://git.kernel.org/tip/9f091fd2047dc4f9cc512e88f818786274fa646f
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:12:24 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:06:42 -0700
xen, pvticketlocks
Commit-ID: 80aefe73ea1611bb064f4dcfe49b1aa9648922b3
Gitweb: http://git.kernel.org/tip/80aefe73ea1611bb064f4dcfe49b1aa9648922b3
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:12:44 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:06:46 -0700
x86, pvticketlock
Commit-ID: 82a5c77805c1824da74912f986f6dab241589ac7
Gitweb: http://git.kernel.org/tip/82a5c77805c1824da74912f986f6dab241589ac7
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:12:04 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:06:38 -0700
xen, pvticketlock
Commit-ID: ee120b6a347e3ce6526bd2380fdf5858d5a8550d
Gitweb: http://git.kernel.org/tip/ee120b6a347e3ce6526bd2380fdf5858d5a8550d
Author: Jeremy Fitzhardinge
AuthorDate: Tue, 6 Aug 2013 17:10:40 +0530
Committer: H. Peter Anvin
CommitDate: Thu, 8 Aug 2013 16:06:23 -0700
x86, spinlock
Commit-ID: ee120b6a347e3ce6526bd2380fdf5858d5a8550d
Gitweb: http://git.kernel.org/tip/ee120b6a347e3ce6526bd2380fdf5858d5a8550d
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:10:40 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
Commit-ID: 82a5c77805c1824da74912f986f6dab241589ac7
Gitweb: http://git.kernel.org/tip/82a5c77805c1824da74912f986f6dab241589ac7
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:12:04 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
Commit-ID: 80aefe73ea1611bb064f4dcfe49b1aa9648922b3
Gitweb: http://git.kernel.org/tip/80aefe73ea1611bb064f4dcfe49b1aa9648922b3
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:12:44 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
Commit-ID: 9f091fd2047dc4f9cc512e88f818786274fa646f
Gitweb: http://git.kernel.org/tip/9f091fd2047dc4f9cc512e88f818786274fa646f
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:12:24 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
Commit-ID: 26dca1a3262c451846537d8c1f3f56290718b7d4
Gitweb: http://git.kernel.org/tip/26dca1a3262c451846537d8c1f3f56290718b7d4
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:11:45 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
Commit-ID: c1230bf0bf6c93ff2db93ba0b66839068f498e8b
Gitweb: http://git.kernel.org/tip/c1230bf0bf6c93ff2db93ba0b66839068f498e8b
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:11:20 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
Commit-ID: faf5f87c305fc58464bf8c47d0a5d148ceee2e32
Gitweb: http://git.kernel.org/tip/faf5f87c305fc58464bf8c47d0a5d148ceee2e32
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:13:52 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
Commit-ID: 00de643f44ed84156e18f8b9afa8613d3b37a298
Gitweb: http://git.kernel.org/tip/00de643f44ed84156e18f8b9afa8613d3b37a298
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:13:13 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
Commit-ID: 38eddb85894561ab32c1de4171e1c1582f0efa78
Gitweb: http://git.kernel.org/tip/38eddb85894561ab32c1de4171e1c1582f0efa78
Author: Jeremy Fitzhardinge jer...@goop.org
AuthorDate: Tue, 6 Aug 2013 17:14:12 +0530
Committer: H. Peter Anvin h...@linux.intel.com
CommitDate: Thu, 8 Aug 2013
On 07/30/2013 12:53 PM, Konrad Rzeszutek Wilk wrote:
> Hey,
>
> I was wondering if it would be possible to remove from linux-next
> the three xen trees and instead use a combined tree, similar to the
> x86 tip (so the various maintainers share it)?
>
> The ones that would be removed are:
>
> xen
On 07/30/2013 12:53 PM, Konrad Rzeszutek Wilk wrote:
Hey,
I was wondering if it would be possible to remove from linux-next
the three xen trees and instead use a combined tree, similar to the
x86 tip (so the various maintainers share it)?
The ones that would be removed are:
xen
On 07/14/2013 12:30 PM, Tim Northover wrote:
>> And that is why I think you should just consider "bt $x,y" to be
>> trivially the same thing and not at all ambiguous. Because there is
>> ABSOLUTELY ZERO ambiguity when people write
>>
>>bt $63, mem
>>
>> Zero. Nada. None. The semantics are
rations because it makes a real
semantic difference, but overly strict for bit operations.
J
> [1]: http://docs.oracle.com/cd/E19253-01/817-5477/817-5477.pdf
>
> Cc: Jeremy Fitzhardinge
> Cc: Andi Kleen
> Cc: Linus Torvalds
> Cc: Ingo Molnar
> Cc: Thomas Gleixner
> C
(Resent without HTML)
On 07/14/2013 10:19 AM, Linus Torvalds wrote:
> Now, there are possible cases where you want to make the size explicit
> because you are mixing memory operand sizes and there can be nasty
> performance implications of doing a 32-bit write and then doing a
> 64-bit read of
]: http://docs.oracle.com/cd/E19253-01/817-5477/817-5477.pdf
Cc: Jeremy Fitzhardinge jer...@goop.org
Cc: Andi Kleen a...@linux.intel.com
Cc: Linus Torvalds torva...@linux-foundation.org
Cc: Ingo Molnar mi...@kernel.org
Cc: Thomas Gleixner t...@linutronix.de
Cc: Eli Friedman eli.fried...@gmail.com
(Resent without HTML)
On 07/14/2013 10:19 AM, Linus Torvalds wrote:
Now, there are possible cases where you want to make the size explicit
because you are mixing memory operand sizes and there can be nasty
performance implications of doing a 32-bit write and then doing a
64-bit read of the
On 07/14/2013 12:30 PM, Tim Northover wrote:
And that is why I think you should just consider bt $x,y to be
trivially the same thing and not at all ambiguous. Because there is
ABSOLUTELY ZERO ambiguity when people write
bt $63, mem
Zero. Nada. None. The semantics are *exactly* the same
On 06/01/2013 12:21 PM, Raghavendra K T wrote:
> x86/spinlock: Replace pv spinlocks with pv ticketlocks
>
> From: Jeremy Fitzhardinge
I'm not sure what the etiquette is here; I did the work while at Citrix,
but jer...@goop.org is my canonical email address. The Citrix address
is dead an
On 06/01/2013 01:14 PM, Andi Kleen wrote:
> FWIW I use the paravirt spinlock ops for adding lock elision
> to the spinlocks.
Does lock elision still use the ticketlock algorithm/structure, or are
they different? If they're still basically ticketlocks, then it seems
to me that they're
On 06/01/2013 01:14 PM, Andi Kleen wrote:
FWIW I use the paravirt spinlock ops for adding lock elision
to the spinlocks.
Does lock elision still use the ticketlock algorithm/structure, or are
they different? If they're still basically ticketlocks, then it seems
to me that they're complimentary
On 06/01/2013 12:21 PM, Raghavendra K T wrote:
x86/spinlock: Replace pv spinlocks with pv ticketlocks
From: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
I'm not sure what the etiquette is here; I did the work while at Citrix,
but jer...@goop.org is my canonical email address. The Citrix
On 10/09/2012 06:14 PM, Andrew Morton wrote:
> On Wed, 10 Oct 2012 00:09:12 + KY Srinivasan wrote:
>
+ if (!pg) {
+ *alloc_error = true;
+ return i * alloc_unit;
+ }
+
+ totalram_pages -= alloc_unit;
On 10/09/2012 06:14 PM, Andrew Morton wrote:
On Wed, 10 Oct 2012 00:09:12 + KY Srinivasan k...@microsoft.com wrote:
+ if (!pg) {
+ *alloc_error = true;
+ return i * alloc_unit;
+ }
+
+ totalram_pages -= alloc_unit;
Well, I'd
On 08/18/2012 07:56 PM, Andi Kleen wrote:
> From: Andi Kleen
>
> The paravirt thunks use a hack of using a static reference to a static
> function to reference that function from the top level statement.
>
> This assumes that gcc always generates static function names in a specific
> format,
On 08/18/2012 07:56 PM, Andi Kleen wrote:
> From: Andi Kleen
>
> The paravirt patching code assumes that it can reference a
> local assembler label between two different top level assembler
> statements. This does not work with some experimental gcc builds,
> where the assembler code may end up
On 08/18/2012 07:56 PM, Andi Kleen wrote:
From: Andi Kleen a...@linux.intel.com
The paravirt patching code assumes that it can reference a
local assembler label between two different top level assembler
statements. This does not work with some experimental gcc builds,
where the assembler
On 08/18/2012 07:56 PM, Andi Kleen wrote:
From: Andi Kleen a...@linux.intel.com
The paravirt thunks use a hack of using a static reference to a static
function to reference that function from the top level statement.
This assumes that gcc always generates static function names in a specific
On 08/13/2012 03:47 AM, Mel Gorman wrote:
> Resending to correct Jeremy's address.
>
> On Wed, Aug 08, 2012 at 03:50:46PM -0700, David Miller wrote:
>> From: Mel Gorman
>> Date: Tue, 7 Aug 2012 09:55:55 +0100
>>
>>> Commit [c48a11c7: netvm: propagate page->pfmemalloc to skb] is responsible
>>>
On 08/13/2012 03:47 AM, Mel Gorman wrote:
Resending to correct Jeremy's address.
On Wed, Aug 08, 2012 at 03:50:46PM -0700, David Miller wrote:
From: Mel Gorman mgor...@suse.de
Date: Tue, 7 Aug 2012 09:55:55 +0100
Commit [c48a11c7: netvm: propagate page-pfmemalloc to skb] is responsible
for
On 07/24/2012 06:15 AM, Yuanhan Liu wrote:
> The old code would call __get_free_page() even though previous
> allocation fail met. This is not needed.
Yeah, I guess, but its hardly worth changing.
J
>
> Signed-off-by: Yuanhan Liu
> Cc: Jeremy Fitzhardinge
> Cc: Tho
On 07/24/2012 06:15 AM, Yuanhan Liu wrote:
The old code would call __get_free_page() even though previous
allocation fail met. This is not needed.
Yeah, I guess, but its hardly worth changing.
J
Signed-off-by: Yuanhan Liu yliu.n...@gmail.com
Cc: Jeremy Fitzhardinge jer...@goop.org
Cc
Mark McLoughlin wrote:
@@ -371,6 +372,9 @@ void __init dmi_scan_machine(void)
}
}
else {
+ if (e820_all_mapped(0xF, 0xF+0x1, E820_RAM))
+ goto out;
One issue with using the e820 map for this is that a
Mark McLoughlin wrote:
@@ -371,6 +372,9 @@ void __init dmi_scan_machine(void)
}
}
else {
+ if (e820_all_mapped(0xF, 0xF+0x1, E820_RAM))
+ goto out;
One issue with using the e820 map for this is that a
Ingo Molnar wrote:
Jeremy, you might want to start tracking x86.git#testing:
http://people.redhat.com/mingo/x86.git/README
if you want to follow the latest & greatest x86.git code.
Right, will do.
J
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Ingo Molnar wrote:
* Vegard Nossum <[EMAIL PROTECTED]> wrote:
asm-x86/kmemcheck.h does seem to be completely missing. Looks like
8db0acefb3025795abe3f37669354677a03de680 "x86: add hooks for
kmemcheck" should have added the file.
Hm. This is x86#testing, no? I don't think there's
CC arch/x86/kernel/traps_32.o
/home/jeremy/hg/xen/paravirt/linux/arch/x86/kernel/traps_32.c:59:27: error:
asm/kmemcheck.h: No such file or directory
asm-x86/kmemcheck.h does seem to be completely missing. Looks like
8db0acefb3025795abe3f37669354677a03de680 "x86: add hooks for
CC arch/x86/kernel/traps_32.o
/home/jeremy/hg/xen/paravirt/linux/arch/x86/kernel/traps_32.c:59:27: error:
asm/kmemcheck.h: No such file or directory
asm-x86/kmemcheck.h does seem to be completely missing. Looks like
8db0acefb3025795abe3f37669354677a03de680 x86: add hooks for kmemcheck
Ingo Molnar wrote:
* Vegard Nossum [EMAIL PROTECTED] wrote:
asm-x86/kmemcheck.h does seem to be completely missing. Looks like
8db0acefb3025795abe3f37669354677a03de680 x86: add hooks for
kmemcheck should have added the file.
Hm. This is x86#testing, no? I don't think there's any
Ingo Molnar wrote:
Jeremy, you might want to start tracking x86.git#testing:
http://people.redhat.com/mingo/x86.git/README
if you want to follow the latest greatest x86.git code.
Right, will do.
J
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the body
Markus Armbruster wrote:
Jeremy Fitzhardinge <[EMAIL PROTECTED]> writes:
Markus Armbruster wrote:
This is a pair of Xen para-virtual frontend device drivers:
drivers/video/xen-fbfront.c provides a framebuffer, and
drivers/input/xen-kbdfront provides keyboard and
Arnd Hannemann wrote:
Jeremy Fitzhardinge wrote:
Arnd Hannemann wrote:
This is with 2.6.24.2, but latest-git looks the same:
I also tried with 2.6.23 which crashes instantly, without any output
of the guest.
I'm not too surprised. Non-PAE Xen is a bit of a rarity
Linus Torvalds wrote:
This isn't a problem with things like "Signed-off-by:" etc tags, because
they have no automated meaning and don't really change the commit itself,
but the "From:"/"Date:"/"Subject:" markers at the head of the message
really do have real meaning, and get removed from the
Arnd Hannemann wrote:
This is with 2.6.24.2, but latest-git looks the same:
I also tried with 2.6.23 which crashes instantly, without any output of the
guest.
I'm not too surprised. Non-PAE Xen is a bit of a rarity, and it only
gets tested rarely. Chris Wright did spend some time on it
Arnd Hannemann wrote:
As paravirtualized xen guests won't work with !X86_PAE, change the Kconfig
accordingly.
!PAE is supposed to work, but it is a rarely used configuration. How
does it fail?
J
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Arnd Hannemann wrote:
As paravirtualized xen guests won't work with !X86_PAE, change the Kconfig
accordingly.
!PAE is supposed to work, but it is a rarely used configuration. How
does it fail?
J
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Arnd Hannemann wrote:
This is with 2.6.24.2, but latest-git looks the same:
I also tried with 2.6.23 which crashes instantly, without any output of the
guest.
I'm not too surprised. Non-PAE Xen is a bit of a rarity, and it only
gets tested rarely. Chris Wright did spend some time on it
Linus Torvalds wrote:
This isn't a problem with things like Signed-off-by: etc tags, because
they have no automated meaning and don't really change the commit itself,
but the From:/Date:/Subject: markers at the head of the message
really do have real meaning, and get removed from the commit
Arnd Hannemann wrote:
Jeremy Fitzhardinge wrote:
Arnd Hannemann wrote:
This is with 2.6.24.2, but latest-git looks the same:
I also tried with 2.6.23 which crashes instantly, without any output
of the guest.
I'm not too surprised. Non-PAE Xen is a bit of a rarity
Markus Armbruster wrote:
Jeremy Fitzhardinge [EMAIL PROTECTED] writes:
Markus Armbruster wrote:
This is a pair of Xen para-virtual frontend device drivers:
drivers/video/xen-fbfront.c provides a framebuffer, and
drivers/input/xen-kbdfront provides keyboard and mouse.
Unless
H. Peter Anvin wrote:
Jeremy Fitzhardinge wrote:
It seems to me that those pages are being handed out as heap pages by
the early allocator. In the Xen case this is OK because there's
nothing magic about them. But if real hardware doesn't reserve these
pages in the E820 map
Linus Torvalds wrote:
On Thu, 21 Feb 2008, Jeremy Fitzhardinge wrote:
OK. Have you fixed it, or shall I resend?
I'll fix it, but I want people to know so that I don't have to fix things
like this in the future (*).
Linus
(*) I keed, I keed. Of *course
H. Peter Anvin wrote:
Still curious about why a pagetable page is ending up in that range
though. Seems like it shouldn't be possible, since we shouldn't be
allowed to allocate from those pages, at least until the DMI probe
has happened... Unless the early allocator is only excluded from
Ian Campbell wrote:
I'll see if I can track down where the page is getting used and have a
go at getting in there first. It must be pretty early to be allocated
already when dmi_scan_machine gets called.
It's possible that the domain builder might have already allocated a PT
at this address. I
Linus Torvalds wrote:
On Thu, 21 Feb 2008, Jeremy Fitzhardinge wrote:
Signed-off-by: Ian Campbell <[EMAIL PROTECTED]>
From: Ian Campbell <[EMAIL PROTECTED]>
Signed-off-by: Jeremy Fitzhardinge <[EMAIL PROTECTED]>
This is just wrong. The From: goes at the
around the place.
Signed-off-by: Ian Campbell <[EMAIL PROTECTED]>
From: Ian Campbell <[EMAIL PROTECTED]>
Signed-off-by: Jeremy Fitzhardinge <[EMAIL PROTECTED]>
---
drivers/block/xen-blkfront.c | 18 ++
1 file chan
Markus Armbruster wrote:
This is a pair of Xen para-virtual frontend device drivers:
drivers/video/xen-fbfront.c provides a framebuffer, and
drivers/input/xen-kbdfront provides keyboard and mouse.
Unless they're actually inter-dependent, could you post this as two
separate patches? I
Markus Armbruster wrote:
Forgot to mention: This patch depends on
Subject: [PATCH] xen: Make xen-blkfront write its protocol ABI to xenstore
From: Markus Armbruster <>
Date: Thu, 06 Dec 2007 14:45:53 +0100
http://lkml.org/lkml/2007/12/6/132
Sorry!
Sorry, I haven't pushed this
[EMAIL PROTECTED] wrote:
Yep. We removed the guest handle stuff for the initial upstreaming,
since it isn't necessary on x86 and it quietened some of the reviewer
noise. But I expected we'd need to reintroduce it at some stage.
J
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[EMAIL PROTECTED] wrote:
diff --git a/arch/x86/xen/events.c b/drivers/xen/events.c
similarity index 95%
rename from arch/x86/xen/events.c
rename to drivers/xen/events.c
index dcf613e..7474739 100644
--- a/arch/x86/xen/events.c
+++ b/drivers/xen/events.c
@@ -37,7 +37,9 @@
#include
#include
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