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Message-Id: <20070924005709.6a151794.akpm@linux-foundation.org> Date: Mon, 24 Sep 2007 00:57:09 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: Frank Mayhar <fmayhar@...gle.com> Cc: linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH getrusage: return ru_maxrss On Thu, 20 Sep 2007 10:57:19 -0700 Frank Mayhar <fmayhar@...gle.com> wrote: > Properly support the ru_maxrss field of the rusage structure returned by > getrusage(). This patch includes documentation both of the getrusage() > implementation in general and of the ru_maxrss implementation > specifically. This implementation matches that of FreeBSD, which is the > only other OS of which I'm aware that implements this field. > > Like a number of other folks, we recently had a need for a non-/proc way > of getting the RSS of a process and happened on getrusage(). Unlike the > rest, though, we fixed the system call to do what we want. I wrote a > wrong implementation and submitted it while I was sick; this time I took > my time and I think I got it right. > > A test program that has been run against a number of systems (of which > only FreeBSD and Linux 2.6 with this patch applied passed) is also > available at > http://www.exit.com/Archives/Linux/ > Nice patch, but the Vaio always wins ;) It boots OK, but when I ssh into the machine: [ 56.310698] sonypi: ioport 0x1080 busy, using sony-laptop? if not use check_ioport=0 [ 56.314186] sonypi: failed to request ioports [ 56.317362] sonypi: probe of sonypi failed with error -16 [ 57.017983] ipw2200: Radio Frequency Kill Switch is On: [ 57.017985] Kill switch must be turned off for wireless networking to work. [ 57.124331] ipw2200: Failed to send WEP_KEY: Aborted due to RF kill switch. [ 57.242396] ipw2200: Failed to send WEP_KEY: Command timed out. [ 60.343396] BUG: unable to handle kernel NULL pointer dereference at virtual address 0000009c [ 60.343573] printing eip: c012ba9c *pde = 00000000 [ 60.343680] Oops: 0000 [#1] PREEMPT [ 60.343763] last sysfs file: /devices/system/cpu/cpu0/cpufreq/scaling_setspeed [ 60.343894] Modules linked in: ipw2200 sonypi ipv6 autofs4 hidp l2cap bluetooth sunrpc nf_conntrack_netbios_ns ipt_REJECT nf_conntrack_ipv4 xt_state nf_conntrack nfnetlink xt_tcpudp iptable_filter ip_tables x_tables acpi_cpufreq sbs sbshc nvram ohci1394 ieee1394 ehci_hcd uhci_hcd sg joydev snd_hda_intel snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss ieee80211 sr_mod cdrom snd_pcm ieee80211_crypt snd_timer i2c_i801 i2c_core snd pcspkr soundcore piix snd_page_alloc battery button ac generic ext3 jbd ide_disk ide_core [ 60.345225] [ 60.345258] Pid: 2503, comm: zsh Not tainted (2.6.23-rc7-mm1 #9) [ 60.345367] EIP: 0060:[<c012ba9c>] EFLAGS: 00010046 CPU: 0 [ 60.345472] EIP is at getrusage+0x181/0x21f [ 60.345551] EAX: 00000000 EBX: 00000000 ECX: c2370ec0 EDX: 00000000 [ 60.345665] ESI: c2370ec0 EDI: 00000002 EBP: c3cc3f1c ESP: c3cc3ec0 [ 60.345779] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 [ 60.345878] Process zsh (pid: 2503, ti=c3cc2000 task=c3cc0e00 task.ti=c3cc2000) [ 60.346009] last branch before last exception/interrupt [ 60.346112] from c012ba9c (getrusage+0x181/0x21f) [ 60.346210] to c0325f70 (__kprobes_text_start+0x0/0x8) [ 60.346317] Stack: bfc698f4 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 60.346539] 00000000 00000159 00000000 00000000 00000100 00000000 00000000 00000000 [ 60.346759] 00000000 00000001 00000001 00000296 00000000 c341ca40 c2370ec0 c3cc3fa0 [ 60.346981] Call Trace: [ 60.347036] [<c0104f55>] show_trace_log_lvl+0x1a/0x2f [ 60.347141] [<c0105007>] show_stack_log_lvl+0x9d/0xa5 [ 60.347245] [<c010513d>] show_registers+0x12e/0x26a [ 60.347346] [<c010537f>] die+0x106/0x1ec [ 60.347430] [<c0118b30>] do_page_fault+0x483/0x56b [ 60.347529] [<c0325fe2>] error_code+0x6a/0x70 [ 60.347620] [<c012347c>] do_wait+0x5ae/0x9fa [ 60.347712] [<c01238f8>] sys_wait4+0x30/0x32 [ 60.347933] [<c0103f92>] syscall_call+0x7/0xb [ 60.348024] ======================= [ 60.348091] Code: 81 5c 0c 00 00 8b 91 60 0c 00 00 0f ac d0 09 01 45 d8 c1 ea 09 8b 89 20 01 00 00 81 e9 20 01 00 00 39 f1 75 94 8b 86 b4 00 00 00 <8b> 90 9c 00 00 00 03 90 98 00 00 00 39 90 a0 00 00 00 73 06 89 [ 60.348909] EIP: [<c012ba9c>] getrusage+0x181/0x21f SS:ESP 0068:c3cc3ec0 [ 60.349049] note: zsh[2503] exited with preempt_count 2 [ 60.349218] BUG: scheduling while atomic: zsh/2503/0x10000003 [ 60.349323] INFO: lockdep is turned off. [ 60.349397] [<c0104f55>] show_trace_log_lvl+0x1a/0x2f [ 60.349501] [<c01059db>] show_trace+0x12/0x14 [ 60.349592] [<c0105afa>] dump_stack+0x15/0x17 [ 60.354070] [<c011b257>] __schedule_bug+0x65/0x6c [ 60.358647] [<c0322ede>] __sched_text_start+0x5e/0x30d [ 60.363137] [<c011b27f>] __cond_resched+0x21/0x3b [ 60.367704] [<c0323815>] cond_resched+0x26/0x31 [ 60.372158] [<c016237b>] unmap_vmas+0x36c/0x44a [ 60.376555] [<c0164be8>] exit_mmap+0x68/0xf0 [ 60.380895] [<c011f106>] mmput+0x34/0x93 [ 60.385293] [<c0122763>] exit_mm+0xb7/0xbc [ 60.389543] [<c0123b95>] do_exit+0x212/0x6ea [ 60.393717] [<c010545d>] die+0x1e4/0x1ec [ 60.397868] [<c0118b30>] do_page_fault+0x483/0x56b [ 60.402058] [<c0325fe2>] error_code+0x6a/0x70 [ 60.406018] [<c012347c>] do_wait+0x5ae/0x9fa [ 60.409780] [<c01238f8>] sys_wait4+0x30/0x32 [ 60.413375] [<c0103f92>] syscall_call+0x7/0xb [ 60.416877] ======================= [ 60.524087] BUG: scheduling while atomic: zsh/2503/0x10000003 [ 60.527489] INFO: lockdep is turned off. [ 60.530845] [<c0104f55>] show_trace_log_lvl+0x1a/0x2f [ 60.534230] [<c01059db>] show_trace+0x12/0x14 [ 60.537543] [<c0105afa>] dump_stack+0x15/0x17 [ 60.540851] [<c011b257>] __schedule_bug+0x65/0x6c [ 60.544142] [<c0322ede>] __sched_text_start+0x5e/0x30d [ 60.547391] [<c011b27f>] __cond_resched+0x21/0x3b [ 60.550589] [<c0323815>] cond_resched+0x26/0x31 [ 60.553772] [<c0122a6f>] put_files_struct+0x6b/0xa8 [ 60.556932] [<c0123bd6>] do_exit+0x253/0x6ea [ 60.560039] [<c010545d>] die+0x1e4/0x1ec [ 60.563147] [<c0118b30>] do_page_fault+0x483/0x56b [ 60.566273] [<c0325fe2>] error_code+0x6a/0x70 [ 60.569318] [<c012347c>] do_wait+0x5ae/0x9fa [ 60.572357] [<c01238f8>] sys_wait4+0x30/0x32 [ 60.575411] [<c0103f92>] syscall_call+0x7/0xb [ 60.578461] ======================= Linux version 2.6.23-rc7-mm1 (akpm@box) (gcc version 4.1.0) #10 PREEMPT Mon Sep 24 00:51:00 PDT 2007 Distro is FC5, config is http://userweb.kernel.org/~akpm/config-sony.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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