- 24 Aug, 2004 40 commits
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Anton Blanchard authored
Most of the inode slabs are cacheline aligned. This can waste a fair amount of memory, especially on architectures with large cacheline sizes (eg 128 bytes). Alignment has a few advantages. It prevents 2 cpus from accessing 2 data structures in the same cacheline. Since struct inodes are well over a cacheline and there are so many of them, there is little chance we will hit this problem if we remove the alignment. Alignment also ensures the maximum amount of the data structure is in the same cacheline (instead of straddling 2 for example). The large size of struct inode reduces this advantage. With this patch the inode_cache slab goes from 640 bytes to 544 bytes, and the number that fits in a 4kB slab goes from 6 to 7 on ppc64. A number of other inode slabs also see improvements. Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Anton Blanchard authored
Reduce size of struct dentry from 248 to 232 bytes on 64bit. - Reduce size of qstr by 8 bytes, placing int hash and int len together. We gain a further 4 byte saving when qstr is used in struct dentry since qstr goes from 24 to 16 bytes and the next member (d_lru) requires 8 byte alignment (which means 4 bytes of padding). - Move d_mounted to the end, since char d_iname[] only requires 1 byte alignment. This reduces struct dentry by another 4 bytes. With these changes the number of objects we can fit into a 4kB slab goes from 16 to 17 on ppc64. Note the above assumes the architecture naturally aligns types. Signed-off-by:
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Anton Blanchard authored
Reduce size of buffer_head from 96 to 88 bytes on 64bit architectures by putting b_count and b_size together. b_count will still be in the first 16 bytes on 32bit architectures, so 16 byte cacheline machines shouldnt be affected. With this change the number of objects per 4kB slab goes up from 40 to 44 on ppc64. Signed-off-by:
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Pavel Machek authored
According to devices.txt, serial ports are reffered as ttyS0 (and not ttyS00). It would be nice to use that convention in printks, too. Signed-off-by:
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Chris Wright authored
Use simple_read_from_buffer in proc_info_read and proc_pid_attr_read. Viro had ack'd this earlier. Signed-off-by:
Chris Wright <chrisw@osdl.org> Signed-off-by:
Stephen Smalley <sds@epoch.ncsc.mil> Signed-off-by:
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Chris Wright authored
Use simple_read_from_buffer. This also eliminates page allocation for the sprintf buffer. Switch to get_zeroed_page instead of open-coding it. Viro had ack'd this earlier. Still applies w/ the transaction update. Signed-off-by:
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Chris Wright authored
Fix typos in security/security.c. From: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: -
Chris Wright authored
Add configure option for setting default SELinux bootparam value. Ack'd by James Morris. Signed-off-by:
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Chris Wright authored
I'd suggest the patch below to let the SECURITY_CAPABILITIES and SECURITY_ROOTPLUG dependencies look a bit more simple. Signed-off-by:
Adrian Bunk <bunk@fs.tum.de> Signed-off-by:
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Christoph Hellwig authored
(from the Debian kernel package) Signed-off-by:
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Christoph Hellwig authored
We don't allow non-ELF kernels since 2.0 days, and surprisingly this is not actually checked anywhere. Signed-off-by:
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Christoph Hellwig authored
This can't happen with a sane filesystem (but is triggered by the buggy clearcase bin only kernel module), so let's better BUG_ON early. Adopted from Al's patch in the RH tree. Signed-off-by:
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Christoph Hellwig authored
- build only if either CONFIG_LEGACY_PTYS or CONFIG_UNIX98_PTYS are set instead of testing in the file - try to keep big CONFIG_LEGACY_PTYS and CONFIG_UNIX98_PTYS ifdef blocks at the end of the file instead of cluttering all over Signed-off-by:
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Jesse Barnes authored
I found that sn_console was missing an include and a fix if CONFIG_SMP=n. This patch fixes up the two small problems I found. Signed-off-by:
Jesse Barnes <jbarnes@sgi.com> Signed-off-by:
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Jesse Barnes authored
People are mainly concerned with showing off their total bogomips, not per-cpu bogomips, so turn it into a KERN_DEBUG message for the benefit of systems with lots of CPUs. Signed-off-by:
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James Morris authored
Below is an updated version of the patch which moves duplicated transaction-based file operation code into libfs. Since the last post, the patch has been through a couple of iterations with Al, who suggested a number of cleanups including locking and interface simplification. For filesystem writers, the interface is now much simpler. The simple_transaction_get() helper should be part of the file op write method. This safely obtains the transaction request data during write(), allocates a page for it and stores it there. The data is returned to the caller for potential further processing, which then makes it available for the next read() call via simple_transaction_set(). See the selinuxfs and nfsctl code for examples of use. Signed-off-by:
James Morris <jmorris@redhat.com> Signed-off-by:
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Pawel Sikora authored
Attached patch fix/add several cpu features. refs: [1] Intel Processor Identification and the CPUID instruction Application Note 485. http://developer.intel.ru/download/design/Xeon/applnots/24161826.pdf [2] http://www.sandpile.org/ia32/cpuid.htmSigned-off-by: -
Dave Jones authored
Only print out the ESR value if it changes after enabling vector. Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
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Ben Leslie authored
When compiling Linux on Mac OSX I had trouble with scripts/sumversion.c. It includes <netinet/in.h> to obtain to definitions of htonl and ntohl. On Mac OSX these are found in <arpa/inet.h>. After checking the POSIX specification it appears that this is the correct place to get the definitons for these functions. (http://www.opengroup.org/onlinepubs/009695399/functions/htonl.html) Using this header also appears to work on Linux (at least with Glibc-2.3.2). It seems clearer to me to go with the POSIX standard than implementing #if __APPLE__ style macros, but if such an approach is preferred I can supply patches for that instead. A patch against 2.6.7 which change <netinet/in.h> -> <arpa/inet.h> is attached. Signed-off-by:
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Brent Casavant authored
It appears there is a nodemask miscalculation in the get_nodes() function in mm/mempolicy.c. This bug has two effects: 1. It is impossible to specify a length 1 nodemask. 2. It is impossible to specify a nodemask containing the last node. The following patch has been confirmed to solve both problems. Signed-off-by:
Brent Casavant <bcasavan@sgi.com> Signed-off-by:
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Michal Ludvig authored
Add a couple more accessors for xstore features. Signed-off-by:
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Paul Jackson authored
fs/smbfs/inode.c: In function `smb_fill_super': fs/smbfs/inode.c:563: warning: comparison is always false due to limited range of data type Unfortunately, this patch uses the notorious "gcc warning suppression by obfuscation" technique. What seems to be going on is that the uid and gid convert macros in include/linux/highuid.h: #define __convert_uid(size, uid) \ (size >= sizeof(uid) ? (uid) : high2lowuid(uid)) only call high2lowuid in the case of trying to put a bigger (32 bit, say) uid/gid in a smaller (16 bit, in this case) word. Gcc is smart enough to see that the comparison in high2lowuid() macro is silly if called with a 16 bit source uid, but not smart enough to understand from the __convert_uid() logic that this is exactly the case that high2lowuid() won't be called. So replace the logical "<" operator with the bit op "&~". This obfuscates things enough to shut gcc up. Only build the half-dozen files that use SET_UID/SET_GID, on arch i386 and ia64. Only the file fs/smbfs/inode.c showed the warning, both arch's, and this patch fixed both. Untested further, past staring at the code long enough to convince myself the change has no actual affect on the code's results. Signed-off-by:Paul Jackson <pj@sgi.com> Signed-off-by:
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Dave Jones authored
arch/i386/mach-generic/summit.c: In function `send_IPI_all': include/asm/mach-summit/mach_ipi.h:4: sorry, unimplemented: inlining failed in call to 'send_IPI_mask_sequence': function body not available arch/i386/mach-generic/summit.c:8: sorry, unimplemented: called from here make[1]: *** [arch/i386/mach-generic/summit.o] Error 1 make: *** [arch/i386/mach-generic] Error 2 arch/i386/mach-generic/bigsmp.c: In function `send_IPI_all': include/asm/mach-bigsmp/mach_ipi.h:4: sorry, unimplemented: inlining failed in call to 'send_IPI_mask_sequence': function body not available arch/i386/mach-generic/bigsmp.c:8: sorry, unimplemented: called from here make[1]: *** [arch/i386/mach-generic/bigsmp.o] Error 1 make: *** [arch/i386/mach-generic] Error 2 arch/i386/mach-generic/es7000.c: In function `send_IPI_all': include/asm/mach-es7000/mach_ipi.h:4: sorry, unimplemented: inlining failed in call to 'send_IPI_mask_sequence': function body not available arch/i386/mach-generic/es7000.c:8: sorry, unimplemented: called from here make[1]: *** [arch/i386/mach-generic/es7000.o] Error 1 make: *** [arch/i386/mach-generic] Error 2 Signed-off-by:
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Pawel Sikora authored
This minor fix is required to proper init "APM emulation" on HP-OmniBooks. (An external patch). "APM emulation" is very useful if you want to use a tool which looks into /proc/apm for getting informations about battery charging. Signed-off-by:
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Josh Aas authored
A patch that reduces bkl usage in do_coredump. I don't see anywhere that it is necessary except for the call to format_corename, which is controlled via sysctl (sys_sysctl holds the bkl). Also make format_corename() static. Signed-off-by:
Josh Aas <josha@sgi.com> Signed-off-by:
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Andi Kleen authored
Fix warnings in es7000. Otherwise gcc 3.3 complains about too large integer values. Signed-off-by:
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Neil Brown authored
This patch adds a 'raid10' module which provides features similar to both raid0 and raid1 in the one array. Various combinations of layout are supported. This code is still "experimental", but appears to work. Signed-off-by:
Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by:
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Neil Brown authored
__bdevname now only prints major/minor number which isn't much help. So remove most calls to it from md.c, replacing those that are useful by calls to bdevname (often printing the message when the error is first detected rather than higher up the call tree). Also discard hot_generate_error which doesn't do anything useful and never has. Signed-off-by:
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Neil Brown authored
1/ rationalise read_balance and "map" in raid1. Discard map and tidyup the interface to read_balance so it can be used instead. 2/ use offsetof rather than a caclulation to find the size of an structure with a var-length array at the end. 3/ remove some meaningless #defines 4/ use printk_ratelimit to limit reports of failed sectors being redirected. Signed-off-by:
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Neil Brown authored
1/ Introduce "mddev->resync_max_sectors" so that an md personality can ask for resync to cover a different address range than that of a single drive. raid10 will use this. 2/ fix is_mddev_idle so that if there seem to be a negative number of events, it doesn't immediately assume activity. 3/ make "sync_io" (the count of IO sectors used for array resync) an atomic_t to avoid SMP races. 4/ Pass md_sync_acct a "block_device" rather than the containing "rdev", as the whole rdev isn't needed. Also make this an inline function. 5/ Make sure recovery gets interrupted on any error. Signed-off-by:
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William Lee Irwin III authored
During the kernel summit, some discussion was had about the support requirements for a userspace program loader that loads executables into hugetlb on behalf of a major application (Oracle). In order to support this in a robust fashion, the cleanup of the hugetlb must be robust in the presence of disorderly termination of the programs (e.g. kill -9). Hence, the cleanup semantics are those of System V shared memory, but Linux' System V shared memory needs one critical extension for this use: executability. The following microscopic patch enables this major application to provide robust hugetlb cleanup. Signed-off-by:
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William Lee Irwin III authored
PAE is artificially limited in terms of swapspace to the same bitsplit as ordinary i386, a 5/24 split (32 swapfiles, 64GB max swapfile size), when a 5/27 split (32 swapfiles, 512GB max swapfile size) is feasible. This patch transparently removes that limitation by using more of the space available in PAE's wider ptes for swap ptes. While this is obviously not likely to be used directly, it is important from the standpoint of strict non-overcommit, where the swapspace must be potentially usable in order to be reserved for non-overcommit. There are workloads with Committed_AS of over 256GB on ia32 PAE wanting strict non-overcommit to prevent being OOM killed. Signed-off-by:
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Zwane Mwaikambo authored
This was broken when the mwait stuff went in since it executes after the initial idle_setup() has already selected an idle routine and overrides it with default_idle. Signed-off-by:
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by:
Zwane Mwaikambo <zwane@linuxpower.ca> Signed-off-by:
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Manfred Spraul authored
Michael Kerrisk found a bug in the shm accounting code: sysv shm allows to create SHMMNI+1 shared memory segments, instead of SHMMNI segments. The +1 is probably from the first shared anonymous mapping implementation that used the sysv code to implement shared anon mappings. The implementation got replaced, it's now the other way around (sysv uses the shared anon code), but the +1 remained. Signed-off-by:
Manfred Spraul <manfred@colorfullife.com> Signed-off-by:
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Zwane Mwaikambo authored
The incorrect mask was being used when writing back to PMNC write-only-zero bits as well as only ticking the CCNT every 64 processor cycles. Tested on IOP331 and PXA270, i'm still looking for XScale1 users... Signed-off-by:
Luca Rossato <l.rossato@tiscali.it> Signed-off-by:
Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by:
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William Lee Irwin III authored
The sole remaining usage of CLONE_IDLETASK is to determine whether pid allocation should be performed in copy_process(). This patch eliminates that last branch on CLONE_IDLETASK in the normal process creation path, removes the masking of CLONE_IDLETASK from clone_flags as it's now ignored under all circumstances, and furthermore eliminates the symbol CLONE_IDLETASK entirely. From: William Lee Irwin III <wli@holomorphy.com> Fix the fork-idle consolidation. During that consolidation, the generic code was made to pass a pointer to on-stack pt_regs that had been memset() to 0. ia64, however, requires a NULL pt_regs pointer argument and dispatches on that in its copy_thread() function to do SMP trampoline-specific RSE -related setup. Passing pointers to zeroed pt_regs resulted in SMP wakeup -time deadlocks and exceptions. Signed-off-by:
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William Lee Irwin III authored
Every arch now bears the burden of sanitizing CLONE_IDLETASK out of the clone_flags passed to do_fork() by userspace. This patch hoists the masking of CLONE_IDLETASK out of the system call entrypoints into do_fork(), and thereby removes some small overheads from do_fork(), as do_fork() may now assume that CLONE_IDLETASK has been cleared. Signed-off-by:
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Josh Aas authored
Attached is a patch that greatly improves the speed of freeing boot memory. On ia64 machines with 2GB or more memory (I didn't test with less, but I can't imagine there being a problem), the speed improvement is about 75% for the function free_all_bootmem_core. This translates to savings on the order of 1 minute / TB of memory during boot time. That number comes from testing on a machine with 512GB, and extrapolating based on profiling of an unpatched 4TB machine. For 4 and 8 TB machines, the time spent in this function is about 1 minutes/TB, which is painful especially given that there is no indication of what is going on put to the console (this issue to possibly be addressed later). The basic idea is to free higher order pages instead of going through every single one. Also, some unnecessary atomic operations are done away with and replaced with non-atomic equivalents, and prefetching is done where it helps the most. For a more in-depth discusion of this patch, please see the linux-ia64 archives (topic is "free bootmem feedback patch"). The patch is originally Tony Luck's, and I added some further optimizations (non-atomic ops improvements and prefetching). Signed-off-by:
Tony Luck <tony.luck@intel.com> Signed-off-by:
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Badari Pulavarty authored
The problem is, if we increase our readhead size arbitrarily (say 2M), we call mpage_readpages() with 2M and when it tries to allocated a bio enough to fit 2M it fails, then we kick it back to "confused" code - which does 4K at a time. The fix is to ask for the maxium the driver can handle. Signed-off-by:
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Roland Dreier authored
Looks like arch/i386/kernel/doublefault.c is one place in the code that hardcodes the assumption that PAGE_OFFSET == 0xC0000000. Here's a patch that fixes that. Signed-off-by:
Roland Dreier <roland@topspin.com> Signed-off-by:
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