- 25 Mar, 2006 40 commits
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Ralf Baechle authored
Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Eric Dumazet authored
This patch avoids arithmetic on 'signed' types that are slower than 'unsigned'. This saves space and cpu cycles. size of kernel/sys.o before the patch (gcc-3.4.5) text data bss dec hex filename 10924 252 4 11180 2bac kernel/sys.o size of kernel/sys.o after the patch text data bss dec hex filename 10903 252 4 11159 2b97 kernel/sys.o I noticed that gcc-4.1.0 (from Fedora Core 5) even uses idiv instruction for (a+b)/2 if a and b are signed. Signed-off-by:Eric Dumazet <dada1@cosmosbay.com> Signed-off-by:
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Ashok Raj authored
- Moved check for online cpu out of smp_prepare_cpu() - Moved default declaration of smp_prepare_cpu() to kernel/cpu.c - Removed lock_cpu_hotplug() from smp_prepare_cpu() to around it, since its called from cpu_up() as well now. - Removed clearing from cpu_present_map during cpu_offline as it breaks using cpu_up() directly during a subsequent online operation. Signed-off-by:
Ashok Raj <ashok.raj@intel.com> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: "Li, Shaohua" <shaohua.li@intel.com> Signed-off-by:
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Randy Dunlap authored
Add info on flow control for serial consoles. Refer to netconsole option also. Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
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Chen, Kenneth W authored
There is a bug in direct-io on propagating write error up to the higher I/O layer. When performing an async ODIRECT write to a block device, if a device error occurred (like media error or disk is pulled), the error code is only propagated from device driver to the DIO layer. The error code stops at finished_one_bio(). The aysnc write, however, is supposedly have a corresponding AIO event with appropriate return code (in this case -EIO). Application which waits on the async write event, will hang forever since such AIO event is lost forever (if such app did not use the timeout option in io_getevents call. Regardless, an AIO event is lost). The discovery of above bug leads to another discovery of potential race window with dio->result. The fundamental problem is that dio->result is overloaded with dual use: an indicator of fall back path for partial dio write, and an error indicator used in the I/O completion path. In the event of device error, the setting of -EIO to dio->result clashes with value used to track partial write that activates the fall back path. It was also pointed out that it is impossible to use dio->result to track partial write and at the same time to track error returned from device driver. Because direct_io_work can only determines whether it is a partial write at the end of io submission and in mid stream of those io submission, a return code could be coming back from the driver. Thus messing up all the subsequent logic. Proposed fix is to separating out error code returned by the IO completion path from partial IO submit tracking. A new variable is added to dio structure specifically to track io error returned in the completion path. Signed-off-by:
Ken Chen <kenneth.w.chen@intel.com> Acked-by:
Zach Brown <zach.brown@oracle.com> Acked-by:
Suparna Bhattacharya <suparna@in.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by:
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Phillip Susi authored
As Pekka Enberg pointed out, with the if still following the else, you can still get a null uid written to the disk if you specify a default uid= without uid=forget. In other words, if the desktop user is uid=1000 and the mount option uid=1000 is given ( which is done on ubuntu automatically and probably other distributions that use hal ), then if any other user besides uid 1000 owns a file then a 0 will be written to the media as the owning uid instead. Signed-off-by:
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Oliver Neukum authored
Signed-off-by:
Oliver Neukum <oliver@neukum.name> Signed-off-by:
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Jesper Juhl authored
Spotted by the Coverity checker as bug #666 akpm; there are several other `return 1;'s in there which aren't freeing `dev'. (A fix which converts this function to single-exit would be preferred..) Signed-off-by:
Jesper Juhl <jesper.juhl@gmail.com> Cc: Adam Belay <ambx1@neo.rr.com> Signed-off-by:
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Jesper Juhl authored
Fix resource leak and remove pointless cast of kmalloc return value. Signed-off-by:
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Andrew Morton authored
text data bss dec hex filename before: 3605597 1363528 363328 5332453 515de5 vmlinux after: 3605295 1363612 363200 5332107 515c8b vmlinux 218 bytes saved. Also, optimise any_online_cpu() out of existence on CONFIG_SMP=n. This function seems inefficient. Can't we simply AND the two masks, then use find_first_bit()? Cc: Paul Jackson <pj@sgi.com> Signed-off-by: -
Andrew Morton authored
Shrinks the only caller (net/bridge/netfilter/ebtables.c) by 174 bytes. Also, optimise highest_possible_processor_id() out of existence on CONFIG_SMP=n. Cc: Paul Jackson <pj@sgi.com> Signed-off-by:
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Andrew Morton authored
text data bss dec hex filename before: 3488027 1322496 360128 5170651 4ee5db vmlinux after: 3485112 1322480 359968 5167560 4ed9c8 vmlinux 2931 bytes saved Cc: Paul Jackson <pj@sgi.com> Signed-off-by: -
Andrew Morton authored
text data bss dec hex filename before: 3490577 1322408 360000 5172985 4eeef9 vmlinux after: 3488027 1322496 360128 5170651 4ee5db vmlinux Cc: Paul Jackson <pj@sgi.com> Signed-off-by: -
Pat Gefre authored
Add rs422 support to the Altix ioc4 serial driver. Signed-off-by:
Patrick Gefre <pfg@sgi.com> Signed-off-by:
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Eugene Teo authored
dev should be validated before it is being used as index to array. Coverity bug #871 Signed-off-by:
Eugene Teo <eugene.teo@eugeneteo.net> Signed-off-by:
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Adrian Bunk authored
Fix a check-after-use spotted by the Coverity checker. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by:
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Jonathan Corbet authored
Documentation changes to help radix tree users avoid overrunning the tags array. RADIX_TREE_TAGS moves to linux/radix-tree.h and is now known as RADIX_TREE_MAX_TAGS (Nick Piggin's idea). Tag parameters are changed to unsigned, and some comments are updated. Signed-off-by:
Jonathan Corbet <corbet@lwn.net> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by:
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Peter Staubach authored
Correct some error handling on the compat version of the nfsservctl() system. It was detecting errors while copying in the arguments from user space, but then attempting to use the arguments anyway. This didn't seem so good. Signed-off-by:
Peter Staubach <staubach@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by:
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Vasily Averin authored
This patch fixes i2o_dump_hrt output from dmesg: iop0: HRT has 1 entries of 16 bytes each. Adapter 00000012: <7>TID 0000:[<7>H<7>P<7>C<7>*<7>]:<7>PCI 1: Bus 1 Device 22 Function 0<7> Signed-off-by:
Vasily Averin <vvs@sw.ru> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Signed-off-by:
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John Hawkes authored
The "rounded up to nearest power of 2 in size" algorithm in alloc_large_system_hash is not correct. As coded, it takes an otherwise acceptable power-of-2 value and doubles it. For example, we see the error if we boot with thash_entries=2097152 which produces a hash table with 4194304 entries. Signed-off-by:
John Hawkes <hawkes@sgi.com> Cc: Roland Dreier <rdreier@cisco.com> Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com> Signed-off-by:
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Andrew Morton authored
fls() takes an integer, so roundup_pow_of_two() is busted for ulongs larger than 2^32-1. Fix this by implementing and using fls_long(). (Why does roundup_pow_of_two() return a long?) (Why is roundup_pow_of_two() __attribute_const__ whereas long_log2() is __attribute_pure__?) (Why does long_log2() suck so much? Because we were missing fls_long()?) Cc: Roland Dreier <rdreier@cisco.com> Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com> Cc: John Hawkes <hawkes@sgi.com> Signed-off-by:
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Eric Dumazet authored
While doing some benchmarks of an Apache/PHP SMP server, I noticed high oprofile numbers in in_group_p() and _atomic_dec_and_lock(). rank percent 1 4.8911 % __link_path_walk 2 4.8503 % __d_lookup *3 4.2911 % _atomic_dec_and_lock 4 3.9307 % __copy_to_user_ll 5 4.9004 % sysenter_past_esp *6 3.3248 % in_group_p It appears that in_group_p() does an uncessary get_group_info(current->group_info); /* atomic_inc() */ ... /* access current->group_info */ put_group_info(current->group_info); /* _atomic_dec_and_lock */ It is not necessary to do this, because the current task holds a reference on its own group_info, and this reference cannot change during the lookup. This patch deletes the get_group_info()/put_group_info() pair from sys_getgroups(), in_group_p() and in_egroup_p() functions. Signed-off-by:
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Rob Landley authored
If I mount ext2 "rw", I want it to say "rw", not "rw,nogrpid". I caught this writing an automated regression test script for the busybox mount command. The symptom is /dev/loop0 on /images/ext2.dir type ext2 (rw,nogrpid) instead of: /dev/loop0 on /images/ext2.dir type ext2 (rw) The behavior was introduced by git commit 8fc2751b. Signed-off-by:
Rob Landley <rob@landley.net> Cc: Mark Bellon <mbellon@mvista.com> Signed-off-by:
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Johannes Stezenbach authored
http://mpeg.openprojects.net/ doesn't exist Signed-off-by:
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NeilBrown authored
As prepare_write, commit_write and readpage are allowed to return AOP_TRUNCATE_PAGE, page_symlink should respond to them. Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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NeilBrown authored
Flesh out the description of the address_space operations. Signed-off-by:
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Benoit Boissinot authored
fs/reiserfs/item_ops.c: In function 'indirect_print_item': fs/reiserfs/item_ops.c:278: warning: 'num' may be used uninitialized in this function (akpm: this is probably just gcc being dumb) Signed-off-by:
Benoit Boissinot <benoit.boissinot@ens-lyon.fr> Signed-off-by:
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Dave Jones authored
Mailing this address gives.. Sorry your message to max_mk@yahoo.com cannot be delivered. This account has been disabled or discontinued [#102]. mta129.mail.re4.yahoo.com) Signed-off-by:
Dave Jones <davej@redhat.com> Cc: <maxk@qualcomm.com> Signed-off-by:
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Jamie Lokier authored
Nice place isn't it? I've lived in 7 other houses since then. Signed-off-by:
Jamie Lokier <jamie@shareable.org> Signed-off-by:
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Adrian Bunk authored
The Coverity checker found this memory leak. Signed-off-by:
Corey Minyard <minyard@acm.org> Signed-off-by:
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Adrian Bunk authored
We dereference bitmap both one line above and one line below this check rendering this check quite useless. Spotted by the Coverity checker. Signed-off-by:
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Adrian Bunk authored
The Coverity checker wasn't happy seeing a size_t compared with -ENODATA and -ENOSYS. Since the only place where size is set is through the result of reiserfs_xattr_get() which is an int, we could simply make size an int. Signed-off-by:
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Zdenek Pavlas authored
Initramfs initrd images do not need a ramdisk device, so remove this restriction in Kconfig. BLK_DEV_RAM=n saves about 13k on i386. Also without ramdisk device there's no need for "dry run", so initramfs unpacks much faster. People using cramfs, squashfs, or gzipped ext2/minix initrd images are probably smart enough not to turn off ramdisk support by accident. Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by:
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Andrew Morton authored
A couple of places are forgetting to take it. The kswapd case is probably unimportant. keventd_create_kthread() was racy. The whole thing is a bit flakey: you start a kernel thread, get its pid from kernel_thread() then look up its task_struct. a) It assumes that pid recycling takes a "long" time. b) We get a task_struct but no reference was taken on it. The owner of the kswapd and kthread task_struct*'s must assume that the new thread won't exit unexpectedly. Because if it does, they're left holding dead memory and any attempt to control or stop that task will crash. Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
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Kirk True authored
When EXT3FS_DEBUG is #define-d, the compile breaks due to #include file issues. Signed-off-by:
Kirk True <kernel@kirkandsheila.com> Signed-off-by:
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Jesper Juhl authored
This fixes coverity bugs #398 and #397 Signed-off-by:
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Kirill Korotaev authored
This patch reduces scheduling latency in shrink_dcache_sb() noticed during remounting of big partitions with many cached dentries. The same latency fix was applied to select_parent() long ago. Signed-off-by:
Denis Lunev <den@sw.ru> Signed-off-by:
Pavel Emelianov <xemul@sw.ru> Signed-off-by:
Kirill Korotaev <dev@openvz.org> Signed-off-by:
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OGAWA Hirofumi authored
In here, I think the following order is more cache-friendly. Signed-off-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by:
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OGAWA Hirofumi authored
freeze_bdev() uses a fsync_super() without sync_blockdev(). This patch makes __fsync_super() and shares it. Signed-off-by:
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Denis Vlasenko authored
Believe it or not, but in fs/minix/*, the oldest filesystem in the kernel, something still can be fixed: printk("new_inode: bit already set"); "\n" is missing! While at it, I also removed periods from the end of error messages and made capitalization uniform. Also s/i-node/inode/, s/printk (/printk(/ Signed-ff-by:Denis Vlasenko <vda@ilport.com.ua> Signed-off-by:
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