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Re: [RFC][PATCH 1/7] Resource counters

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From: Srivatsa Vaddagiri

Subject: Re: [RFC][PATCH 1/7] Resource counters

Date: Tuesday, March 13, 2007 - 9:07 am

On Tue, Mar 13, 2007 at 06:41:05PM +0300, Pavel Emelianov wrote:
quoted text> > right, but atomic ops have much less impact on most
> > architectures than locks :)
> 
> Right. But atomic_add_unless() is slower as it is
> essentially a loop. See my previous letter in this sub-thread.

If I am not mistaken, you shouldn't loop in normal cases, which means
it boils down to a atomic_read() + atomic_cmpxch()


-- 
Regards,
vatsa
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Messages in current thread:

[RFC][PATCH 0/7] Resource controllers based on process con ..., Pavel Emelianov, (Tue Mar 6, 7:42 am)

[RFC][PATCH 1/7] Resource counters, Pavel Emelianov, (Tue Mar 6, 7:49 am)

[RFC][PATCH 2/7] RSS controller core, Pavel Emelianov, (Tue Mar 6, 7:55 am)

[RFC][PATCH 3/7] Data structures changes for RSS accounting, Pavel Emelianov, (Tue Mar 6, 7:58 am)

[RFC][PATCH 4/7] RSS accounting hooks over the code, Pavel Emelianov, (Tue Mar 6, 8:00 am)

[RFC][PATCH 5/7] Per-container OOM killer and page reclamation, Pavel Emelianov, (Tue Mar 6, 8:03 am)

[RFC][PATCH 6/7] Account for the number of tasks within co ..., Pavel Emelianov, (Tue Mar 6, 8:04 am)

[RFC][PATCH 7/7] Account for the number of files opened wi ..., Pavel Emelianov, (Tue Mar 6, 8:07 am)

Re: [RFC][PATCH 2/7] RSS controller core, Andrew Morton, (Tue Mar 6, 3:00 pm)

Re: [RFC][PATCH 6/7] Account for the number of tasks withi ..., Paul Menage, (Tue Mar 6, 7:00 pm)

Re: [RFC][PATCH 0/7] Resource controllers based on process ..., Paul Menage, (Tue Mar 6, 7:02 pm)

Re: [RFC][PATCH 1/7] Resource counters, Balbir Singh, (Tue Mar 6, 9:03 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Balbir Singh, (Tue Mar 6, 10:37 pm)

Re: [RFC][PATCH 0/7] Resource controllers based on process ..., Balbir Singh, (Tue Mar 6, 11:52 pm)

Re: [RFC][PATCH 6/7] Account for the number of tasks withi ..., Pavel Emelianov, (Wed Mar 7, 12:13 am)

Re: [RFC][PATCH 1/7] Resource counters, Pavel Emelianov, (Wed Mar 7, 12:19 am)

Re: [RFC][PATCH 2/7] RSS controller core, Pavel Emelianov, (Wed Mar 7, 12:27 am)

Re: [RFC][PATCH 0/7] Resource controllers based on process ..., Pavel Emelianov, (Wed Mar 7, 12:30 am)

Re: [RFC][PATCH 0/7] Resource controllers based on process ..., Pavel Emelianov, (Wed Mar 7, 12:32 am)

Re: [RFC][PATCH 0/7] Resource controllers based on process ..., Kirill Korotaev, (Wed Mar 7, 2:43 am)

Re: [RFC][PATCH 6/7] Account for the number of tasks withi ..., Paul Menage, (Thu Mar 8, 6:49 am)

Re: [RFC][PATCH 1/7] Resource counters, Herbert Poetzl, (Fri Mar 9, 9:37 am)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Fri Mar 9, 9:48 am)

Re: [RFC][PATCH 5/7] Per-container OOM killer and page rec ..., Balbir Singh, (Fri Mar 9, 2:21 pm)

Re: [RFC][PATCH 6/7] Account for the number of tasks withi ..., Pavel Emelianov, (Sun Mar 11, 1:36 am)

Re: [RFC][PATCH 5/7] Per-container OOM killer and page rec ..., Pavel Emelianov, (Sun Mar 11, 1:41 am)

Re: [RFC][PATCH 1/7] Resource counters, Pavel Emelianov, (Sun Mar 11, 2:01 am)

Re: [RFC][PATCH 2/7] RSS controller core, Pavel Emelianov, (Sun Mar 11, 2:08 am)

Re: [RFC][PATCH 2/7] RSS controller core, Kirill Korotaev, (Sun Mar 11, 5:26 am)

Re: [RFC][PATCH 2/7] RSS controller core, Andrew Morton, (Sun Mar 11, 5:51 am)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Sun Mar 11, 7:32 am)

Re: [RFC][PATCH 2/7] RSS controller core, Pavel Emelianov, (Sun Mar 11, 8:04 am)

Re: [RFC][PATCH 2/7] RSS controller core, Balbir Singh, (Sun Mar 11, 8:51 am)

Re: [RFC][PATCH 1/7] Resource counters, Eric W. Biederman, (Sun Mar 11, 12:00 pm)

Re: [RFC][PATCH 3/7] Data structures changes for RSS accou ..., Eric W. Biederman, (Sun Mar 11, 12:13 pm)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Eric W. Biederman, (Sun Mar 11, 12:14 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Eric W. Biederman, (Sun Mar 11, 12:34 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Sun Mar 11, 5:41 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Sun Mar 11, 6:00 pm)

Re: [RFC][PATCH 1/7] Resource counters, Herbert Poetzl, (Sun Mar 11, 6:16 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Pavel Emelianov, (Mon Mar 12, 1:31 am)

Re: [RFC][PATCH 2/7] RSS controller core, Pavel Emelianov, (Mon Mar 12, 2:02 am)

Re: [Devel] Re: [RFC][PATCH 2/7] RSS controller core, Kirill Korotaev, (Mon Mar 12, 2:23 am)

Re: [RFC][PATCH 2/7] RSS controller core, Balbir Singh, (Mon Mar 12, 2:55 am)

Re: [RFC][PATCH 3/7] Data structures changes for RSS accou ..., Kirill Korotaev, (Mon Mar 12, 9:16 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Kirill Korotaev, (Mon Mar 12, 9:23 am)

Re: [RFC][PATCH 3/7] Data structures changes for RSS accou ..., Dave Hansen, (Mon Mar 12, 9:48 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Dave Hansen, (Mon Mar 12, 9:50 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Kirill Korotaev, (Mon Mar 12, 10:07 am)

Re: [RFC][PATCH 3/7] Data structures changes for RSS accou ..., Pavel Emelianov, (Mon Mar 12, 10:19 am)

Re: [RFC][PATCH 3/7] Data structures changes for RSS accou ..., Balbir Singh, (Mon Mar 12, 10:21 am)

Re: [RFC][PATCH 3/7] Data structures changes for RSS accou ..., Dave Hansen, (Mon Mar 12, 10:27 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Dave Hansen, (Mon Mar 12, 10:33 am)

Re: [RFC][PATCH 2/7] RSS controller core, Dave Hansen, (Mon Mar 12, 11:42 am)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Mon Mar 12, 2:11 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Mon Mar 12, 3:41 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Dave Hansen, (Mon Mar 12, 4:02 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Mon Mar 12, 4:43 pm)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Herbert Poetzl, (Mon Mar 12, 4:54 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Balbir Singh, (Mon Mar 12, 6:57 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Srivatsa Vaddagiri, (Mon Mar 12, 7:24 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Andrew Morton, (Mon Mar 12, 11:04 pm)

Re: [RFC][PATCH 3/7] Data structures changes for RSS accou ..., Pavel Emelianov, (Tue Mar 13, 12:10 am)

Re: [RFC][PATCH 2/7] RSS controller core, Pavel Emelianov, (Tue Mar 13, 12:17 am)

Re: [RFC][PATCH 1/7] Resource counters, Eric W. Biederman, (Tue Mar 13, 2:09 am)

Re: [Devel] Re: [RFC][PATCH 2/7] RSS controller core, Eric W. Biederman, (Tue Mar 13, 2:26 am)

Re: [RFC][PATCH 1/7] Resource counters, Pavel Emelianov, (Tue Mar 13, 2:27 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Eric W. Biederman, (Tue Mar 13, 2:43 am)

Re: [Devel] Re: [RFC][PATCH 1/7] Resource counters, Kirill Korotaev, (Tue Mar 13, 2:49 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Eric W. Biederman, (Tue Mar 13, 2:58 am)

Re: [Devel] Re: [RFC][PATCH 2/7] RSS controller core, Kirill Korotaev, (Tue Mar 13, 3:19 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Nick Piggin, (Tue Mar 13, 3:25 am)

Re: [Devel] Re: [RFC][PATCH 2/7] RSS controller core, Andrew Morton, (Tue Mar 13, 4:48 am)

Re: [Devel] Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Tue Mar 13, 7:59 am)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Tue Mar 13, 8:05 am)

Re: [RFC][PATCH 2/7] RSS controller core, Kirill Korotaev, (Tue Mar 13, 8:10 am)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Tue Mar 13, 8:11 am)

Re: [RFC][PATCH 1/7] Resource counters, Herbert Poetzl, (Tue Mar 13, 8:21 am)

Re: [RFC][PATCH 2/7] RSS controller core, Pavel Emelianov, (Tue Mar 13, 8:32 am)

Re: [RFC][PATCH 1/7] Resource counters, Pavel Emelianov, (Tue Mar 13, 8:41 am)

Re: [Devel] Re: [RFC][PATCH 2/7] RSS controller core, Kirill Korotaev, (Tue Mar 13, 8:43 am)

Re: [RFC][PATCH 2/7] RSS controller core, Kirill Korotaev, (Tue Mar 13, 8:54 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Eric W. Biederman, (Tue Mar 13, 9:01 am)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Tue Mar 13, 9:06 am)

Re: [RFC][PATCH 1/7] Resource counters, Srivatsa Vaddagiri, (Tue Mar 13, 9:07 am)

Re: [RFC][PATCH 1/7] Resource counters, Herbert Poetzl, (Tue Mar 13, 9:32 am)

Re: [RFC][PATCH 2/7] RSS controller core, Dave Hansen, (Tue Mar 13, 10:05 am)

Re: [RFC][PATCH 2/7] RSS controller core, Dave Hansen, (Tue Mar 13, 10:26 am)

Re: [RFC][PATCH 2/7] RSS controller core, Alan Cox, (Tue Mar 13, 12:09 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Dave Hansen, (Tue Mar 13, 1:28 pm)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Nick Piggin, (Tue Mar 13, 8:51 pm)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Balbir Singh, (Tue Mar 13, 11:42 pm)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Nick Piggin, (Tue Mar 13, 11:57 pm)

Re: [RFC][PATCH 1/7] Resource counters, Pavel Emelianov, (Wed Mar 14, 12:12 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Balbir Singh, (Wed Mar 14, 12:48 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Vaidyanathan Srinivasan, (Wed Mar 14, 6:25 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Nick Piggin, (Wed Mar 14, 6:49 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Vaidyanathan Srinivasan, (Wed Mar 14, 7:43 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Cedric Le Goater, (Wed Mar 14, 8:37 am)

Re: [RFC][PATCH 2/7] RSS controller core, Mel Gorman, (Wed Mar 14, 8:38 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Pavel Emelianov, (Wed Mar 14, 8:45 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Kirill Korotaev, (Wed Mar 14, 9:16 am)

Re: [RFC][PATCH 2/7] RSS controller core, Mel Gorman, (Wed Mar 14, 9:47 am)

Re: [RFC][PATCH 2/7] RSS controller core, Dave Hansen, (Wed Mar 14, 1:42 pm)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Nick Piggin, (Wed Mar 14, 10:01 pm)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Balbir Singh, (Wed Mar 14, 10:44 pm)

Re: [RFC][PATCH 1/7] Resource counters, Eric W. Biederman, (Thu Mar 15, 9:51 am)

Re: [RFC][PATCH 2/7] RSS controller core, Eric W. Biederman, (Thu Mar 15, 5:55 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Dave Hansen, (Fri Mar 16, 9:31 am)

Re: [RFC][PATCH 2/7] RSS controller core, Eric W. Biederman, (Fri Mar 16, 11:54 am)

Re: [RFC][PATCH 2/7] RSS controller core, Dave Hansen, (Fri Mar 16, 12:46 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Eric W. Biederman, (Sun Mar 18, 9:58 am)

Re: [RFC][PATCH 2/7] RSS controller core, Eric W. Biederman, (Sun Mar 18, 10:42 am)

Re: [Devel] Re: [RFC][PATCH 2/7] RSS controller core, Paul Menage, (Sun Mar 18, 3:44 pm)

Re: [RFC][PATCH 2/7] RSS controller core, Herbert Poetzl, (Mon Mar 19, 8:48 am)

Re: [Devel] Re: [RFC][PATCH 2/7] RSS controller core, Eric W. Biederman, (Mon Mar 19, 10:41 am)

controlling mmap()'d vs read/write() pages, Dave Hansen, (Tue Mar 20, 9:15 am)

Re: [RFC][PATCH 2/7] RSS controller core, Mel Gorman, (Tue Mar 20, 11:57 am)

Re: controlling mmap()'d vs read/write() pages, Eric W. Biederman, (Tue Mar 20, 2:19 pm)

Re: controlling mmap()'d vs read/write() pages, Herbert Poetzl, (Thu Mar 22, 5:51 pm)

Re: controlling mmap()'d vs read/write() pages, Nick Piggin, (Thu Mar 22, 10:57 pm)

Re: controlling mmap()'d vs read/write() pages, Eric W. Biederman, (Fri Mar 23, 3:12 am)

Re: controlling mmap()'d vs read/write() pages, Nick Piggin, (Fri Mar 23, 3:47 am)

Re: controlling mmap()'d vs read/write() pages, Eric W. Biederman, (Fri Mar 23, 5:21 am)

Re: controlling mmap()'d vs read/write() pages, Dave Hansen, (Fri Mar 23, 9:41 am)

Re: controlling mmap()'d vs read/write() pages, Herbert Poetzl, (Fri Mar 23, 11:16 am)

Re: controlling mmap()'d vs read/write() pages, Nick Piggin, (Wed Mar 28, 12:33 am)

Re: controlling mmap()'d vs read/write() pages, Balbir Singh, (Wed Mar 28, 2:18 am)

Re: [RFC][PATCH 4/7] RSS accounting hooks over the code, Ethan Solomita, (Wed Mar 28, 1:15 pm)

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