Re: "Trying to free nonexistent swap-page" error message.
Johan Seland > One one of our Linux Oracle servers the following messages has started > to appear : > > Jun 29 07:16:32 blanco kernel: swap_free: Trying to free nonexistent swap-page > Jun 29 07:16:32 blanco kernel: swap_free: Trying to free nonexistent swap-page > > I also find some of these: > > Jun 29 06:25:01 blanco kernel: EXT2-fs error (device sd(8,10)): ext2_readdir: bad >entry in directory #172258: rec_len %% 4 != 0 - offset=192, inode=812610409, >rec_len=11833, name_len=115 > Jun 29 06:25:32 blanco kernel: EXT2-fs error (device sd(8,10)): ext2_readdir: bad >entry in directory #172258: rec_len %% 4 != 0 - offset=192, inode=812610409, >rec_len=11833, name_len=115 > > Machine is a 2x933MhZ P3 with 2GB of memory. Kernel version is now > 2.2.19, but the same problem appeared with 2.2.18 as well. My first guess would be some sort of hardware/software problem with your SCSI controller, cables, disk, etc. I'm not sure about the swap problem, but the ext2 problems are caused by corruption of the disk or memory. It is not just a single-bit error either, because rec_len % 4 != 0 AND it is larger than a page size, so the value is totally bogus, as is the inode number. Interestingly, converting the above ext2 numbers into ascii gives: 0x69 0x73 0x6f 0x30 0x39 0x2e 0x73 => iso09.s (in the order they are layed out in ext2_dir_entry_2). Coincidence or bug? I would suggest a full fsck for the filesystem, as it is likely that there are other problems. Now when you say "servers" do you mean you have the same problem on multiple machines? Are they identical, or different? Cheers, Andreas -- Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto, \ would they cancel out, leaving him still hungry?" http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
"Trying to free nonexistent swap-page" error message.
Hello, I have searched the archives for this error message before, but no one seems to have given a good answer. (Though the question has been posted before.) I am not sure if this is a kernel problem, a hardware problem or a Oracle problem. (Or a combination of them.) One one of our Linux Oracle servers the following messages has started to appear : Jun 29 07:16:32 blanco kernel: swap_free: Trying to free nonexistent swap-page Jun 29 07:16:32 blanco kernel: swap_free: Trying to free nonexistent swap-page They seem to always come in pairs, and usually with about three hours between them. The database had to be restored from backup because of massive table corruption recently, but these messages also appeared before we had to restore it. (But we believe they might have caused the corruption.) I also find some of these: Jun 29 06:25:01 blanco kernel: EXT2-fs error (device sd(8,10)): ext2_readdir: bad entry in directory #172258: rec_len %% 4 != 0 - offset=192, inode=812610409, rec_len=11833, name_len=115 Jun 29 06:25:32 blanco kernel: EXT2-fs error (device sd(8,10)): ext2_readdir: bad entry in directory #172258: rec_len %% 4 != 0 - offset=192, inode=812610409, rec_len=11833, name_len=115 Machine is a 2x933MhZ P3 with 2GB of memory. Kernel version is now 2.2.19, but the same problem appeared with 2.2.18 as well. The database is in moderate to heavy use 24/7 and with a lot (~ 500 - 3000) processes during business hours. The machine has only 128MB of swap, is this to little since it has a full 2GB of memory? dmesg output from machine The kernel is stock 2.2.19 with the following patch applied: --- include/linux/tasks.h~ Wed Jan 17 14:45:54 2001 +++ include/linux/tasks.h Wed Jan 17 14:46:39 2001 @@ -11,7 +11,7 @@ #define NR_CPUS 1 #endif -#define NR_TASKS 512 /* On x86 Max about 4000 */ +#define NR_TASKS 4000/* On x86 Max about 4000 */ #define MAX_TASKS_PER_USER (NR_TASKS/2) #define MIN_TASKS_LEFT_FOR_ROOT 4 -- Regards Johan Seland Programmer Net Fonds ASA
Trying to free nonexistent swap-page error message.
Hello, I have searched the archives for this error message before, but no one seems to have given a good answer. (Though the question has been posted before.) I am not sure if this is a kernel problem, a hardware problem or a Oracle problem. (Or a combination of them.) One one of our Linux Oracle servers the following messages has started to appear : Jun 29 07:16:32 blanco kernel: swap_free: Trying to free nonexistent swap-page Jun 29 07:16:32 blanco kernel: swap_free: Trying to free nonexistent swap-page They seem to always come in pairs, and usually with about three hours between them. The database had to be restored from backup because of massive table corruption recently, but these messages also appeared before we had to restore it. (But we believe they might have caused the corruption.) I also find some of these: Jun 29 06:25:01 blanco kernel: EXT2-fs error (device sd(8,10)): ext2_readdir: bad entry in directory #172258: rec_len %% 4 != 0 - offset=192, inode=812610409, rec_len=11833, name_len=115 Jun 29 06:25:32 blanco kernel: EXT2-fs error (device sd(8,10)): ext2_readdir: bad entry in directory #172258: rec_len %% 4 != 0 - offset=192, inode=812610409, rec_len=11833, name_len=115 Machine is a 2x933MhZ P3 with 2GB of memory. Kernel version is now 2.2.19, but the same problem appeared with 2.2.18 as well. The database is in moderate to heavy use 24/7 and with a lot (~ 500 - 3000) processes during business hours. The machine has only 128MB of swap, is this to little since it has a full 2GB of memory? dmesg output from machine The kernel is stock 2.2.19 with the following patch applied: --- include/linux/tasks.h~ Wed Jan 17 14:45:54 2001 +++ include/linux/tasks.h Wed Jan 17 14:46:39 2001 @@ -11,7 +11,7 @@ #define NR_CPUS 1 #endif -#define NR_TASKS 512 /* On x86 Max about 4000 */ +#define NR_TASKS 4000/* On x86 Max about 4000 */ #define MAX_TASKS_PER_USER (NR_TASKS/2) #define MIN_TASKS_LEFT_FOR_ROOT 4 -- Regards Johan Seland Programmer Net Fonds ASA
Re: Trying to free nonexistent swap-page error message.
Johan Seland One one of our Linux Oracle servers the following messages has started to appear : Jun 29 07:16:32 blanco kernel: swap_free: Trying to free nonexistent swap-page Jun 29 07:16:32 blanco kernel: swap_free: Trying to free nonexistent swap-page I also find some of these: Jun 29 06:25:01 blanco kernel: EXT2-fs error (device sd(8,10)): ext2_readdir: bad entry in directory #172258: rec_len %% 4 != 0 - offset=192, inode=812610409, rec_len=11833, name_len=115 Jun 29 06:25:32 blanco kernel: EXT2-fs error (device sd(8,10)): ext2_readdir: bad entry in directory #172258: rec_len %% 4 != 0 - offset=192, inode=812610409, rec_len=11833, name_len=115 Machine is a 2x933MhZ P3 with 2GB of memory. Kernel version is now 2.2.19, but the same problem appeared with 2.2.18 as well. My first guess would be some sort of hardware/software problem with your SCSI controller, cables, disk, etc. I'm not sure about the swap problem, but the ext2 problems are caused by corruption of the disk or memory. It is not just a single-bit error either, because rec_len % 4 != 0 AND it is larger than a page size, so the value is totally bogus, as is the inode number. Interestingly, converting the above ext2 numbers into ascii gives: 0x69 0x73 0x6f 0x30 0x39 0x2e 0x73 = iso09.s (in the order they are layed out in ext2_dir_entry_2). Coincidence or bug? I would suggest a full fsck for the filesystem, as it is likely that there are other problems. Now when you say servers do you mean you have the same problem on multiple machines? Are they identical, or different? Cheers, Andreas -- Andreas Dilger \ If a man ate a pound of pasta and a pound of antipasto, \ would they cancel out, leaving him still hungry? http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
