Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes | KernelTrap

Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes

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From: Christoph Hellwig

Subject: Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes

Date: Thursday, November 27, 2008 - 2:48 am

On Thu, Nov 27, 2008 at 10:39:31AM +0100, Peter Zijlstra wrote:
quoted text> With it being called from writeback that might not be true for all
> workloads. One thing you can do about it is use the regular per-cpu
> counter stuff, which allows you to do an approximation of the global
> number (it also does all the hotplug stuff for you already).

The way it's used in writeback is utterly stupid and should be fixed :)

But otherwise agreed.

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2.6.28-rc5: Reported regressions 2.6.26 -> 2.6.27, Rafael J. Wysocki, (Sun Nov 16, 10:38 am)

[Bug #11207] VolanoMark regression with 2.6.27-rc1, Rafael J. Wysocki, (Sun Nov 16, 10:38 am)

[Bug #11308] tbench regression on each kernel release from ..., Rafael J. Wysocki, (Sun Nov 16, 10:40 am)

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[Bug #11805] mounting XFS produces a segfault, Rafael J. Wysocki, (Sun Nov 16, 10:40 am)

[Bug #11795] ks959-sir dongle no longer works under 2.6.27 ..., Rafael J. Wysocki, (Sun Nov 16, 10:40 am)

[Bug #11836] Scheduler on C2D CPU and latest 2.6.27 kernel, Rafael J. Wysocki, (Sun Nov 16, 10:40 am)

[Bug #11843] usb hdd problems with 2.6.27.2, Rafael J. Wysocki, (Sun Nov 16, 10:40 am)

[Bug #11865] WOL for E100 Doesn't Work Anymore, Rafael J. Wysocki, (Sun Nov 16, 10:40 am)

[Bug #11876] RCU hang on cpu re-hotplug with 2.6.27rc8, Rafael J. Wysocki, (Sun Nov 16, 10:40 am)

[Bug #11886] without serial console system doesn't poweroff, Rafael J. Wysocki, (Sun Nov 16, 10:40 am)

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[Bug #12039] Regression: USB/DVB 2.6.26.8 --&gt; 2.6.27.6, Rafael J. Wysocki, (Sun Nov 16, 10:41 am)

[Bug #12048] Regression in bonding between 2.6.26.8 and 2. ..., Rafael J. Wysocki, (Sun Nov 16, 10:41 am)

Re: [Bug #11843] usb hdd problems with 2.6.27.2, Luciano Rocha, (Sun Nov 16, 2:37 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 2:06 am)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 2:14 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 4:01 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 4:20 am)

Re: [Bug #11805] mounting XFS produces a segfault, Christoph Hellwig, (Mon Nov 17, 7:44 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 9:11 am)

Re: [Bug #11404] BUG: in 2.6.23-rc3-git7 in do_cciss_intr, Randy Dunlap, (Mon Nov 17, 9:19 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 9:35 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 10:08 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 10:25 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 10:33 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Linus Torvalds, (Mon Nov 17, 10:38 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 10:42 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 11:23 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Linus Torvalds, (Mon Nov 17, 11:33 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 11:49 am)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 12:21 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 12:30 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 12:31 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 12:36 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 12:39 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 12:43 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Linus Torvalds, (Mon Nov 17, 12:47 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Linus Torvalds, (Mon Nov 17, 12:48 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 12:51 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 12:52 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 12:53 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Linus Torvalds, (Mon Nov 17, 12:55 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Linus Torvalds, (Mon Nov 17, 12:57 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 12:57 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 1:16 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 1:18 pm)

(avc_has_perm_noaudit()) Re: [Bug #11308] tbench regressio ..., Ingo Molnar, (Mon Nov 17, 1:20 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Linus Torvalds, (Mon Nov 17, 1:30 pm)

ip_queue_xmit(): Re: [Bug #11308] tbench regression on eac ..., Ingo Molnar, (Mon Nov 17, 1:32 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 1:47 pm)

skb_release_head_state(): Re: [Bug #11308] tbench regressi ..., Ingo Molnar, (Mon Nov 17, 1:55 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 1:56 pm)

Re: ip_queue_xmit(): Re: [Bug #11308] tbench regression on ..., Eric Dumazet, (Mon Nov 17, 1:57 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 1:58 pm)

Re: skb_release_head_state(): Re: [Bug #11308] tbench regr ..., David Miller, (Mon Nov 17, 2:01 pm)

Re: skb_release_head_state(): Re: [Bug #11308] tbench regr ..., Eric Dumazet, (Mon Nov 17, 2:04 pm)

tcp_ack(): Re: [Bug #11308] tbench regression on each kern ..., Ingo Molnar, (Mon Nov 17, 2:09 pm)

tcp_recvmsg(): Re: [Bug #11308] tbench regression on each ..., Ingo Molnar, (Mon Nov 17, 2:19 pm)

eth_type_trans(): Re: [Bug #11308] tbench regression on ea ..., Ingo Molnar, (Mon Nov 17, 2:26 pm)

Re: skb_release_head_state(): Re: [Bug #11308] tbench regr ..., Linus Torvalds, (Mon Nov 17, 2:34 pm)

__inet_lookup_established(): Re: [Bug #11308] tbench regre ..., Ingo Molnar, (Mon Nov 17, 2:35 pm)

Re: skb_release_head_state(): Re: [Bug #11308] tbench regr ..., Ingo Molnar, (Mon Nov 17, 2:38 pm)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., Eric Dumazet, (Mon Nov 17, 2:40 pm)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., Linus Torvalds, (Mon Nov 17, 2:52 pm)

system_call() - Re: [Bug #11308] tbench regression on each ..., Ingo Molnar, (Mon Nov 17, 2:59 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 3:08 pm)

Re: system_call() - Re: [Bug #11308] tbench regression on ..., Linus Torvalds, (Mon Nov 17, 3:09 pm)

Re: __inet_lookup_established(): Re: [Bug #11308] tbench r ..., Eric Dumazet, (Mon Nov 17, 3:14 pm)

tcp_transmit_skb() - Re: [Bug #11308] tbench regression on ..., Ingo Molnar, (Mon Nov 17, 3:14 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 3:15 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 3:19 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 3:26 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Mon Nov 17, 3:39 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Mon Nov 17, 3:47 pm)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., Eric Dumazet, (Mon Nov 17, 4:41 pm)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., Linus Torvalds, (Mon Nov 17, 5:01 pm)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., David Miller, (Mon Nov 17, 10:16 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Mon Nov 17, 10:23 pm)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., Eric Dumazet, (Mon Nov 17, 10:35 pm)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., David Miller, (Tue Nov 18, 12:00 am)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., Ingo Molnar, (Tue Nov 18, 1:30 am)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., Eric Dumazet, (Tue Nov 18, 1:35 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Tue Nov 18, 1:45 am)

Re: eth_type_trans(): Re: [Bug #11308] tbench regression o ..., Eric Dumazet, (Tue Nov 18, 1:49 am)

Re: ip_queue_xmit(): Re: [Bug #11308] tbench regression on ..., Nick Piggin, (Tue Nov 18, 2:12 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Nick Piggin, (Tue Nov 18, 2:44 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Mike Galbraith, (Tue Nov 18, 5:29 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Linus Torvalds, (Tue Nov 18, 8:58 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Nick Piggin, (Tue Nov 18, 9:31 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Christoph Lameter, (Wed Nov 19, 12:43 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Wed Nov 19, 1:14 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Thu Nov 20, 2:06 am)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Thu Nov 20, 2:14 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Christoph Lameter, (Thu Nov 20, 4:52 pm)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Fri Nov 21, 1:30 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Fri Nov 21, 1:51 am)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Fri Nov 21, 2:03 am)

Re: [Bug #11308] tbench regression on each kernel release ..., David Miller, (Fri Nov 21, 2:05 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Ingo Molnar, (Fri Nov 21, 2:18 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Fri Nov 21, 5:51 am)

[PATCH] fs: pipe/sockets/anon dentries should not have a p ..., Eric Dumazet, (Fri Nov 21, 8:13 am)

Re: [PATCH] fs: pipe/sockets/anon dentries should not have ..., Ingo Molnar, (Fri Nov 21, 8:21 am)

Re: [PATCH] fs: pipe/sockets/anon dentries should not have ..., Eric Dumazet, (Fri Nov 21, 8:28 am)

Re: [PATCH] fs: pipe/sockets/anon dentries should not have ..., Ingo Molnar, (Fri Nov 21, 8:34 am)

Re: [PATCH] fs: pipe/sockets/anon dentries should not have ..., Christoph Hellwig, (Fri Nov 21, 8:36 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Christoph Lameter, (Fri Nov 21, 9:11 am)

[PATCH] fs: pipe/sockets/anon dentries should have themsel ..., Eric Dumazet, (Fri Nov 21, 10:58 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Christoph Lameter, (Fri Nov 21, 11:06 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Fri Nov 21, 11:16 am)

Re: [Bug #11308] tbench regression on each kernel release ..., Eric Dumazet, (Fri Nov 21, 11:19 am)

Re: [PATCH] fs: pipe/sockets/anon dentries should have the ..., Matthew Wilcox, (Fri Nov 21, 11:43 am)

Re: [PATCH] fs: pipe/sockets/anon dentries should have the ..., Eric Dumazet, (Sat Nov 22, 8:53 pm)

[PATCH 0/6] fs: Scalability of sockets/pipes allocation/de ..., Eric Dumazet, (Wed Nov 26, 4:27 pm)

[PATCH 1/6] fs: Introduce a per_cpu nr_dentry, Eric Dumazet, (Wed Nov 26, 4:30 pm)

[PATCH 3/6] fs: Introduce a per_cpu last_ino allocator, Eric Dumazet, (Wed Nov 26, 4:32 pm)

[PATCH 4/6] fs: Introduce a per_cpu nr_inodes, Eric Dumazet, (Wed Nov 26, 4:32 pm)

[PATCH 5/6] fs: Introduce special inodes, Eric Dumazet, (Wed Nov 26, 4:32 pm)

[PATCH 6/6] fs: Introduce kern_mount_special() to mount sp ..., Eric Dumazet, (Wed Nov 26, 4:32 pm)

Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocatio ..., Christoph Lameter, (Wed Nov 26, 6:37 pm)

Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocatio ..., Eric Dumazet, (Wed Nov 26, 11:27 pm)

Re: [PATCH 5/6] fs: Introduce special inodes, David Miller, (Thu Nov 27, 1:20 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., David Miller, (Thu Nov 27, 1:21 am)

Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes, Peter Zijlstra, (Thu Nov 27, 2:32 am)

Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes, Peter Zijlstra, (Thu Nov 27, 2:39 am)

Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocatio ..., Christoph Hellwig, (Thu Nov 27, 2:39 am)

Re: [PATCH 1/6] fs: Introduce a per_cpu nr_dentry, Christoph Hellwig, (Thu Nov 27, 2:41 am)

Re: [PATCH 3/6] fs: Introduce a per_cpu last_ino allocator, Christoph Hellwig, (Thu Nov 27, 2:46 am)

Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes, Christoph Hellwig, (Thu Nov 27, 2:48 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Christoph Hellwig, (Thu Nov 27, 2:53 am)

Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes, Eric Dumazet, (Thu Nov 27, 3:01 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Eric Dumazet, (Thu Nov 27, 3:04 am)

Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes, Andi Kleen, (Thu Nov 27, 3:07 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Christoph Hellwig, (Thu Nov 27, 3:10 am)

Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocatio ..., Christoph Lameter, (Thu Nov 27, 7:44 am)

Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes, Christoph Lameter, (Thu Nov 27, 7:46 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Al Viro, (Fri Nov 28, 2:26 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Al Viro, (Fri Nov 28, 2:34 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Ingo Molnar, (Fri Nov 28, 11:02 am)

Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocatio ..., Ingo Molnar, (Fri Nov 28, 11:03 am)

Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocatio ..., Peter Zijlstra, (Fri Nov 28, 11:47 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Ingo Molnar, (Fri Nov 28, 11:58 am)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Eric Dumazet, (Fri Nov 28, 3:20 pm)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Eric Dumazet, (Fri Nov 28, 3:37 pm)

Re: [PATCH 6/6] fs: Introduce kern_mount_special() to moun ..., Eric Dumazet, (Fri Nov 28, 3:43 pm)

Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocatio ..., Christoph Hellwig, (Fri Nov 28, 11:38 pm)

Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocatio ..., Eric Dumazet, (Sat Nov 29, 1:07 am)

[PATCH v2 0/5] fs: Scalability of sockets/pipes allocation ..., Eric Dumazet, (Sat Nov 29, 1:43 am)

[PATCH v2 1/5] fs: Use a percpu_counter to track nr_dentry, Eric Dumazet, (Sat Nov 29, 1:43 am)

[PATCH v2 2/5] fs: Use a percpu_counter to track nr_inodes, Eric Dumazet, (Sat Nov 29, 1:43 am)

[PATCH v2 3/5] fs: Introduce a per_cpu last_ino allocator, Eric Dumazet, (Sat Nov 29, 1:44 am)

[PATCH v2 4/5] fs: Introduce SINGLE dentries for pipes, so ..., Eric Dumazet, (Sat Nov 29, 1:44 am)

[PATCH v2 5/5] fs: new_inode_single() and iput_single(), Eric Dumazet, (Sat Nov 29, 1:45 am)

Re: [PATCH v2 4/5] fs: Introduce SINGLE dentries for pipes ..., Jörn, (Sat Nov 29, 3:38 am)