From: "Abu M. Muttalib" <abum@aftek.com>
To: kernelnewbies@nl.linux.org, linux-newbie@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm <linux-mm@kvack.org>
Subject: Commenting out out_of_memory() function in __alloc_pages()
Date: Fri, 7 Jul 2006 15:16:37 +0530 [thread overview]
Message-ID: <BKEKJNIHLJDCFGDBOHGMAEBKDCAA.abum@aftek.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 794 bytes --]
Hi,
I am getting the Out of memory.
To circumvent the problem, I have commented the call to "out_of_memory(),
and replaced "goto restart" with "goto nopage".
At "nopage:" lable I have added a call to "schedule()" and then "return
NULL" after "schedule()".
I tried the modified kernel with a test application, the test application is
mallocing memory in a loop. Unlike as expected the process gets killed. On
second run of the same application I am getting the page allocation failure
as expected but subsequently the system hangs.
I am attaching the test application and the log herewith.
I am getting this exception with kernel 2.6.13. With kernel
2.4.19-rmka7-pxa1 there was no problem.
Why its so? What can I do to alleviate the OOM problem?
Thanks in anticipation and regards,
Abu.
[-- Attachment #2: mail_oom_test_6.TXT --]
[-- Type: text/plain, Size: 11528 bytes --]
sh-3.00# ./test1\a
OOM Test: Counter = 0
....
OOM Test: Counter = 6635
, OOM: Out of Memory would have been called....<4>test1: page allocation failure. order:0, mode:0xd2
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:2
\rcpu 0 cold: low 0, high 2, batch 1 used:1
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 588kB (0kB HighMem)
\rActive:2178 inactive:230 dirty:0 writeback:0 unstable:0 free:147 slab:367 mapped:2178 pagetables:43
\rDMA free:588kB min:512kB low:640kB high:768kB active:8712kB inactive:920kB present:16384kB pages_scanned:4851 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 9*4kB 3*8kB 1*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 588kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r218 free pages
\r625 reserved pages
\r367 slab pages
\r0 pages shared
\r0 pages swap cached
\rVM: killing process test1
\rKilled
sh-3.00# ./test1
OOM Test: Counter = 0
....
OOM Test: Counter = 6416
, OOM: Out of Memory would have been called....<4>test1: page allocation failure. order:0, mode:0x201d0
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:2
\rcpu 0 cold: low 0, high 2, batch 1 used:1
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 672kB (0kB HighMem)
\rActive:2187 inactive:170 dirty:0 writeback:0 unstable:0 free:168 slab:365 mapped:2125 pagetables:43
\rDMA free:672kB min:512kB low:640kB high:768kB active:8748kB inactive:680kB present:16384kB pages_scanned:2939 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 28*4kB 6*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 672kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r239 free pages
\r625 reserved pages
\r365 slab pages
\r13 pages shared
\r0 pages swap cached
\rError -5 while decompressing!
\rc01e42f4(2388)->c0754000(4096)
\rError -3 while decompressing!
\rc01e4c48(2531)->c0caf000(4096)
\rError -3 while decompressing!
\rc01e562b(2643)->c0914000(4096)
\r, OOM: Out of Memory would have been called....<4>test1: page allocation failure. order:0, mode:0x201d2
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:3
\rcpu 0 cold: low 0, high 2, batch 1 used:1
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 600kB (0kB HighMem)
\rActive:2267 inactive:113 dirty:0 writeback:0 unstable:0 free:150 slab:365 mapped:2125 pagetables:43
\rDMA free:600kB min:512kB low:640kB high:768kB active:9068kB inactive:452kB present:16384kB pages_scanned:222 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 22*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 600kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r222 free pages
\r625 reserved pages
\r365 slab pages
\r13 pages shared
\r0 pages swap cached
\r, OOM: Out of Memory would have been called....<4>init: page allocation failure. order:0, mode:0x201d0
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:3
\rcpu 0 cold: low 0, high 2, batch 1 used:1
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 696kB (0kB HighMem)
\rActive:2220 inactive:136 dirty:0 writeback:0 unstable:0 free:174 slab:365 mapped:2125 pagetables:43
\rDMA free:696kB min:512kB low:640kB high:768kB active:8880kB inactive:544kB present:16384kB pages_scanned:6729 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 44*4kB 1*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 696kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r246 free pages
\r625 reserved pages
\r365 slab pages
\r3 pages shared
\r0 pages swap cached
\rError -5 while decompressing!
\rc01e7949(2386)->c040d000(4096)
\rError -3 while decompressing!
\rc01e829b(2297)->c05e9000(4096)
\r, OOM: Out of Memory would have been called....<4>init: page allocation failure. order:0, mode:0x201d2
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:4
\rcpu 0 cold: low 0, high 2, batch 1 used:1
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 600kB (0kB HighMem)
\rActive:2189 inactive:166 dirty:0 writeback:0 unstable:0 free:150 slab:364 mapped:2125 pagetables:43
\rDMA free:600kB min:512kB low:640kB high:768kB active:8756kB inactive:664kB present:16384kB pages_scanned:7675 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 20*4kB 1*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 600kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r223 free pages
\r625 reserved pages
\r364 slab pages
\r1 pages shared
\r0 pages swap cached
\r, OOM: Out of Memory would have been called....<4>test1: page allocation failure. order:0, mode:0x201d0
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:4
\rcpu 0 cold: low 0, high 2, batch 1 used:1
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 600kB (0kB HighMem)
\rActive:2291 inactive:64 dirty:0 writeback:0 unstable:0 free:150 slab:364 mapped:2125 pagetables:43
\rDMA free:600kB min:512kB low:640kB high:768kB active:9164kB inactive:256kB present:16384kB pages_scanned:10106 all_unreclaimable? yes
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 20*4kB 1*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 600kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r223 free pages
\r625 reserved pages
\r364 slab pages
\r2 pages shared
\r0 pages swap cached
\r, OOM: Out of Memory would have been called....<4>init: page allocation failure. order:0, mode:0x201d2
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:4
\rcpu 0 cold: low 0, high 2, batch 1 used:0
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 512kB (0kB HighMem)
\rActive:2296 inactive:125 dirty:0 writeback:0 unstable:0 free:128 slab:364 mapped:2127 pagetables:43
\rDMA free:512kB min:512kB low:640kB high:768kB active:9184kB inactive:500kB present:16384kB pages_scanned:10106 all_unreclaimable? yes
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 512kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r200 free pages
\r625 reserved pages
\r364 slab pages
\r34 pages shared
\r0 pages swap cached
\r, OOM: Out of Memory would have been called....<4>init: page allocation failure. order:0, mode:0x201d2
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:4
\rcpu 0 cold: low 0, high 2, batch 1 used:0
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 512kB (0kB HighMem)
\rActive:2296 inactive:125 dirty:0 writeback:0 unstable:0 free:128 slab:364 mapped:2127 pagetables:43
\rDMA free:512kB min:512kB low:640kB high:768kB active:9184kB inactive:500kB present:16384kB pages_scanned:10106 all_unreclaimable? yes
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 512kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r200 free pages
\r625 reserved pages
\r364 slab pages
\r34 pages shared
\r0 pages swap cached
\r, OOM: Out of Memory would have been called....<4>test1: page allocation failure. order:0, mode:0x201d2
\rMem-info:
\rDMA per-cpu:
\rcpu 0 hot: low 2, high 6, batch 1 used:4
\rcpu 0 cold: low 0, high 2, batch 1 used:0
\rNormal per-cpu: empty
\rHighMem per-cpu: empty
\rFree pages: 512kB (0kB HighMem)
\rActive:2296 inactive:125 dirty:0 writeback:0 unstable:0 free:128 slab:364 mapped:2133 pagetables:43
\rDMA free:512kB min:512kB low:640kB high:768kB active:9184kB inactive:500kB present:16384kB pages_scanned:10106 all_unreclaimable? yes
\rlowmem_reserve[]: 0 0 0
\rNormal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rHighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
\rlowmem_reserve[]: 0 0 0
\rDMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB = 512kB
\rNormal: empty
\rHighMem: empty
\rSwap cache: add 0, delete 0, find 0/0, race 0+0
\rFree swap = 0kB
\rTotal swap = 0kB
\rFree swap: 0kB
\r4096 pages of RAM
\r200 free pages
\r625 reserved pages
\r364 slab pages
\r40 pages shared
\r0 pages swap cached
\r, OOM: Out of Memory would have been called....VM: killing process test1
[-- Attachment #3: test1.c --]
[-- Type: application/octet-stream, Size: 319 bytes --]
#include<stdio.h>
#include<string.h>
main()
{
char* buff;
int count;
count=0;
while(1)
{
printf("\nOOM Test: Counter = %d", count);
buff = (char*) malloc(1024);
// memset(buff,'\0',1024);
count++;
if (buff==NULL)
{
printf("\nOOM Test: Memory allocation error");
}
}
}
next reply other threads:[~2006-07-07 9:46 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-07 9:46 Abu M. Muttalib [this message]
2006-07-07 9:54 ` Robin Holt
2006-07-11 14:57 ` Abu M. Muttalib
2006-07-11 15:08 ` Abu M. Muttalib
2006-07-11 15:19 ` Abu M. Muttalib
2006-07-13 5:12 ` Mouhammad Tayseer Alquoatli
2006-07-11 15:35 ` Chase Venters
2006-07-24 9:44 ` Abu M. Muttalib
2006-07-07 21:21 ` Chase Venters
[not found] <fa.AmXizdwfdZtqgKFSMcRp3U0QZXI@ifi.uio.no>
2006-07-08 18:06 ` Robert Hancock
2006-07-09 4:23 ` Abu M. Muttalib
2006-07-09 5:18 ` Chase Venters
2006-07-09 6:11 ` Abu M. Muttalib
2006-07-09 7:55 ` Chase Venters
2006-07-09 11:55 ` Alan Cox
2006-07-09 11:48 ` Abu M. Muttalib
2006-07-09 12:01 ` Willy Tarreau
2006-07-09 12:13 ` Abu M. Muttalib
2006-07-09 12:15 ` Willy Tarreau
2006-07-09 13:12 ` Abu M. Muttalib
2006-07-09 13:23 ` Willy Tarreau
2006-07-09 12:09 ` Alan Cox
2006-07-09 12:03 ` Abu M. Muttalib
2006-07-09 12:03 ` Nick Piggin
2006-07-09 14:34 ` Abu M. Muttalib
2006-07-09 15:15 ` Nick Piggin
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