- 16 Jul, 2007 40 commits
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Andrea Arcangeli authored
This follows a suggestion from Chuck Ebbert on how to make seccomp absolutely zerocost in schedule too. The only remaining footprint of seccomp is in terms of the bzImage size that becomes a few bytes (perhaps even a few kbytes) larger, measure it if you care in the embedded. Signed-off-by:
Andrea Arcangeli <andrea@cpushare.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Andrea Arcangeli authored
This reduces the memory footprint and it enforces that only the current task can enable seccomp on itself (this is a requirement for a strightforward [modulo preempt ;) ] TIF_NOTSC implementation). Signed-off-by:
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Oleg Nesterov authored
sock_xmit() re-implements sigprocmask() and dequeue_signal_lock(). Signed-off-by:
Oleg Nesterov <oleg@tv-sign.ru> Acked-by:
Paul Clements <paul.clements@steeleye.com> Signed-off-by:
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Oleg Nesterov authored
kcdrwd() is a kernel thread, all signals are ignored. Signed-off-by:
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Oleg Nesterov authored
adb_probe_task() is forked by "events" thread, all signals are ignored, no need to play with signal blocking/flushing. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Andrew Morton authored
Fix this: fs/block_dev.c: In function 'bd_claim_by_disk': fs/block_dev.c:970: warning: 'found' may be used uninitialized in this function and given that free_bd_holder() now needs free(NULL)-is-legal behaviour, we can simplify bd_release_from_kobject(). Cc: Bjorn Steinbrink <B.Steinbrink@gmx.de> Cc: Johannes Weiner <hannes-kernel@saeurebad.de> Signed-off-by:
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Johannes Weiner authored
Replace some funky codepaths in fs/block_dev.c with cleaner versions of the affected places. [akpm@linux-foundation.org: fix return value] Signed-off-by:
Johannes Weiner <hannes-kernel@saeurebad.de> Cc: Bjorn Steinbrink <B.Steinbrink@gmx.de> Signed-off-by:
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Adrian Bunk authored
Every file should include the headers containing the prototypes for its global functions. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Andrew Morton authored
Remove pointless `else'. Signed-off-by:
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Duane Griffin authored
Add custom dentry hash and comparison operations for HFS+ filesystems that are case-insensitive and/or do automatic unicode decomposition. The new operations reuse the existing HFS+ ASCII to unicode conversion, unicode decomposition and case folding functionality. Signed-off-by:
Duane Griffin <duaneg@dghda.com> Signed-off-by:
Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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Duane Griffin authored
The HFS+ filesystem is case-insensitive and does automatic unicode decomposition by default, but does not provide custom dentry operations. This can lead to multiple dentries being cached for lookups on a filename with varying case and/or character (de)composition. These patches add custom dentry hash and comparison operations for case-sensitive and/or automatically decomposing HFS+ filesystems. Unicode decomposition and case-folding are performed as required to ensure equivalent filenames are hashed to the same values and compare as equal. This patch: Refactor existing HFS+ ASCII to unicode string conversion routine to split out character conversion functionality. This will be reused by the custom dentry hash and comparison routines. This approach avoids unnecessary memory allocation compared to using the string conversion routine directly in the new functions. [akpm@linux-foundation.org: avoid use-of-uninitialised] Signed-off-by:
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Toshiyuki Okajima authored
In ext4_new_blocks(), one of two ext4_block_bitmap() calls should be ext4_inode_bitmap() call. It is not harmful in normal processing, but it should be fixed. Signed-off-by:
Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by:
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Andrew Morton authored
Hopefully this will help people to understand the new regime. Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Andrew Morton authored
Poeple keep on adding new numbered sysctls, when they're supposed not to. Add a documentation file which explain why new sysctls should use CTL_UNNUMBERED. The next patch will sprinkle pointers to this throughout sysctl.c. Eric provided the text (thanks) Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Thomas Gleixner authored
The recent PRIVATE and REQUEUE_PI changes to the futex code made it hard to read. Tidy it up. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Borislav Petkov authored
Update the description of struct file_system_type and get_sb() in Documentation/filesystems/vfs.txt to match the current code. Signed-off-by:
Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by:
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Robert P. J. Day authored
Signed-off-by:
Robert P. J. Day <rpjday@mindspring.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by:
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Ingo Molnar authored
Improve performance of sys_time(). sys_time() returns time in seconds, but it does so by calling do_gettimeofday() and then returning the tv_sec portion of the GTOD time. But the data structure "xtime", which is updated by every timer/scheduler tick, already offers HZ granularity time. The patch improves the sysbench OLTP macrobenchmark significantly: 2.6.22-rc6: #threads 1: transactions: 3733 (373.21 per sec.) 2: transactions: 6676 (667.46 per sec.) 3: transactions: 6957 (695.50 per sec.) 4: transactions: 7055 (705.48 per sec.) 5: transactions: 6596 (659.33 per sec.) 2.6.22-rc6 + sys_time.patch: 1: transactions: 4005 (400.47 per sec.) 2: transactions: 7379 (737.77 per sec.) 3: transactions: 7347 (734.49 per sec.) 4: transactions: 7468 (746.65 per sec.) 5: transactions: 7428 (742.47 per sec.) Mixed API uses of gettimeofday() and time() are guaranteed to be coherent via the use of a at-most-once-per-second slowpath that updates xtime. [akpm@linux-foundation.org: build fixes] Signed-off-by:
Ingo Molnar <mingo@elte.hu> Cc: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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vignesh babu authored
Replace (n & (n-1)) in the context of power of 2 checks with is_power_of_2(). Signed-off-by:
vignesh babu <vignesh.babu@wipro.com> Signed-off-by:
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vignesh babu authored
Replace (n & (n-1)) in the context of power of 2 checks with is_power_of_2() Signed-off-by:
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Christoph Hellwig authored
sys_ioctl() was only exported for our first version of compat ioctl handling. Now that the whole compat ioctl handling mess is more or less sorted out there are no more modular users left and we can kill it. There's one exception and that's sparc64's solaris compat module, but sparc64 has it's own export predating the generic one by years for that which this patch leaves untouched. Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Randy Dunlap authored
Add info that the Code: bytes line contains <xy> or (wxyz) in some architecture oops reports and what that means. Add a script by Andi Kleen that reads the Code: line from an Oops report file and generates assembly code from the hex bytes. Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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Eric W. Biederman authored
While working on unshare support for the network namespace I noticed we were putting clone flags in an int. Which is weird because the syscall uses unsigned long and we at least need an unsigned to properly hold all of the unshare flags. So to make the code consistent, this patch updates the code to use unsigned long instead of int for the clone flags in those places where we get it wrong today. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Acked-by:
Cedric Le Goater <clg@fr.ibm.com> Signed-off-by:
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Dave Hansen authored
ext3_change_inode_journal_flag() is only called from one location: ext3_ioctl(EXT3_IOC_SETFLAGS). That ioctl case already has a IS_RDONLY() call in it so this one is superfluous. Signed-off-by:
Dave Hansen <haveblue@us.ibm.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by:
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C. Scott Ananian authored
The procfs-guide claims that 'the parameter start doesn't seem to be used anywhere in the kernel'. This is out of date. In linux/fs/proc/generic.c we find a very nice description of the parameters to read_func. The appended patch replaces the bogus description with this (as far as I know) accurate one. Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Robert P. J. Day authored
Signed-off-by:
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Vasily Tarasov authored
OpenVZ Linux kernel team has discovered the problem with 32bit quota tools working on 64bit architectures. In 2.6.10 kernel sys32_quotactl() function was replaced by sys_quotactl() with the comment "sys_quotactl seems to be 32/64bit clean, enable it for 32bit" However this isn't right. Look at if_dqblk structure: struct if_dqblk { __u64 dqb_bhardlimit; __u64 dqb_bsoftlimit; __u64 dqb_curspace; __u64 dqb_ihardlimit; __u64 dqb_isoftlimit; __u64 dqb_curinodes; __u64 dqb_btime; __u64 dqb_itime; __u32 dqb_valid; }; For 32 bit quota tools sizeof(if_dqblk) == 0x44. But for 64 bit kernel its size is 0x48, 'cause of alignment! Thus we got a problem. Attached patch reintroduce sys32_quotactl() function, that handles this and related situations. [michal.k.k.piotrowski@gmail.com: build fix] [akpm@linux-foundation.org: Make it link with CONFIG_QUOTA=n] Signed-off-by:Vasily Tarasov <vtaras@openvz.org> Cc: Andi Kleen <ak@suse.de> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Jan Kara <jack@ucw.cz> Cc: <linux-arch@vger.kernel.org> Signed-off-by:
Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Signed-off-by:
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Arnd Bergmann authored
One common problem with 32 bit system call and ioctl emulation is the different alignment rules between i386 and 64 bit machines. A number of drivers work around this by marking the compat structures as 'attribute((packed))', which is not the right solution because it breaks all the non-x86 architectures that want to use the same compat code. Hopefully, this patch improves the situation, it introduces two new types, compat_u64 and compat_s64. These are defined on all architectures to have the same size and alignment as the 32 bit version of u64 and s64. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
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Henrik Kretzschmar authored
Fix parameter name in audit_core_dumps for kerneldoc. Signed-off-by:
Henrik Kretzschmar <henne@nachtwindheim.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Nathan Lynch authored
aa953877 removed the implementation of lock_cpu_hotplug_interruptible and all users of it. This stub definition for !CONFIG_HOTPLUG_CPU was left over -- kill it now. Signed-off-by:
Nathan Lynch <ntl@pobox.com> Signed-off-by:
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Jan Kara authored
ext4_orphan_add() and ext4_orphan_del() functions lock sb->s_lock with a transaction started with ext4_mark_recovery_complete() waits for a transaction holding sb->s_lock, thus leading to a possible deadlock. At the moment we call ext4_mark_recovery_complete() from ext4_remount() we have done all the work needed for remounting and thus we are safe to drop sb->s_lock before we wait for transactions to commit. Note that at this moment we are still guarded by s_umount lock against other remounts/umounts. Signed-off-by:
Jan Kara <jack@suse.cz> Cc: Eric Sandeen <sandeen@sandeen.net> Cc: <linux-ext4@vger.kernel.org> Signed-off-by:
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Jan Kara authored
ext3_orphan_add() and ext3_orphan_del() functions lock sb->s_lock with a transaction started with ext3_mark_recovery_complete() waits for a transaction holding sb->s_lock, thus leading to a possible deadlock. At the moment we call ext3_mark_recovery_complete() from ext3_remount() we have done all the work needed for remounting and thus we are safe to drop sb->s_lock before we wait for transactions to commit. Note that at this moment we are still guarded by s_umount lock against other remounts/umounts. Signed-off-by:
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Jan Beulich authored
Especially when !CONFIG_HOTPLUG_CPU, avoid needlessy allocating resources for CPUs that can never become available. Signed-off-by:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Cedric Le Goater authored
It should improve performance in some scenarii where a lot of these nsproxy objects are created by unsharing namespaces. This is a typical use of virtual servers that are being created or entered. This is also a good tool to find leaks and gather statistics on namespace usage. Signed-off-by:
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Cedric Le Goater authored
dup_mnt_ns() and clone_uts_ns() return NULL on failure. This is wrong, create_new_namespaces() uses ERR_PTR() to catch an error. This means that the subsequent create_new_namespaces() will hit BUG_ON() in copy_mnt_ns() or copy_utsname(). Modify create_new_namespaces() to also use the errors returned by the copy_*_ns routines and not to systematically return ENOMEM. [oleg@tv-sign.ru: better changelog] Signed-off-by:
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Andrew Morton authored
Repair indenting bustage. Signed-off-by:
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Dave Jones authored
It's useful sometimes to disable the softlockup checker at boottime. Especially if it triggers during a distro install. Signed-off-by:
Dave Jones <davej@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Robert P. J. Day authored
Remove not only the references to Cobalt NVRAM, but the header file as well. Signed-off-by:
Tim Hockin <thockin@hockin.org> Signed-off-by:
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Paul E. McKenney authored
Add an item to the RCU documentation checklist noting that RCU callbacks can run in parallel. Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
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Andrew Morton authored
fs/binfmt_elf.c: In function 'load_elf_binary': fs/binfmt_elf.c:1002: warning: 'interp_map_addr' may be used uninitialized in this function The compiler (gcc-4.1.0) is correct, but it failed to notice that we didn't use the resulting value. Signed-off-by:
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