- 18 Jun, 2004 40 commits
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Davide Libenzi authored
The epoll allocation for the fd lookup hash used to allocate up to 1MB (depending on the "hint" size passed to epoll_create()) with __get_free_pages(0), and this might lead to a "malicious" user to do something like: for (i = 0; i < 1024; i++) epoll_create(BIG-NUM); You can replace "malicious user" with IBM-ltp test suite, and the meaning does not change. The above code might exhaust memory badly, even before the file creation limit is topped. Also, the allocation was independent from the number of fds pushed into the epoll fd hash. Using an rb-tree ther will be not pre-allocation of the hash, and the size of the memory used will be proportional to the number of fds pushed into the epoll fd. The patch also removes 100 lines of code, that is never a bad thing ;) Signed-off-by:Davide Libenzi <davidel@xmailserver.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Robert T. Johnson authored
Judging from context, I think there's a misplaced "&" in this code that can cause stack overflows and other nasty problems. Perhaps it's left over from when msgdata was an array instead of a pointer? Signed-off-by:
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Andrew Morton authored
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Petr Vandrovec authored
It decreases stack consumption in one of ncpfs's paths from 3000 to 2200 bytes (and stack portion in ncpfs ioctl code from 1336 to 452 bytes). - some code used large structure (with embeded 256 bytes for filename) while it never passed filename around. Use something smaller in ncp_conn_logged_in. Decrease 616 => 300. - gcc-3.3 is very bad when it comes to parallel blocks in ioctl. Split some branches from large switch to separate functions. ncp_ioctl now uses 152 bytes of stack (instead of 720) and biggest child 64. Signed-off-by:
Petr Vandrovec <vandrove@vc.cvut.cz> Signed-off-by:
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Herbert Xu authored
It can be replaced by a simple memcpy. Signed-off-by:
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Herbert Xu authored
Here's the patch that removes the memset calls from both pmdisk and swsusp. Signed-off-by:
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Herbert Xu authored
Fix a couple of memory leaks in the pmdisk driver. Signed-off-by:
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Pavel Machek authored
This fixes 2 memory leaks in swsusp: during relocating pagedir, eaten pages were not properly freed in error path and even regular freeing path was freeing one page too little. Signed-off-by:
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Jens Axboe authored
The 'unplug on queued exceeding unplug threshold' logic only works for file system requests currently, since it's in __make_request(). Move it where it belongs, in elv_add_request(). This way it works for queued block sg requests as well. Signed-Off-By:
Jens Axboe <axboe@suse.de> Signed-off-by:
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Jens Axboe authored
Mt rainier probe must be deferred to media load time, since it requires a valid media (the drive may present a different capability based on what media is loaded). This fixes that for ide-cd and sr. Signed-Off-By:
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Mike Miller authored
This patch provides a conversion routine for 32-bit user space apps that call into a 64-bit kernel on x86_64 architectures. This is required for the HP Array Configuration utility and the HP management agents. Without this patch the apps will not function. The 2 ioctls affected are the cciss pass thru ioctls. Caveat: it spits out 2 warnings during compilation. I've tried everything I can think of to clean them up, but... If anyone has any helpful suggestions I'm all ears. Code by Stephen Cameron Tested by Stephen Cameron & Mike Miller Signed-off-by:
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Andrea Arcangeli authored
Avoid taking down_write(mmap_sem) unless we really need it. Seems that the only reason we're taking it for writing is to protect vma->vm_flags. Signed-off-by:
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Arun Sharma authored
Due to different structure alignment rules in the ABI between ia32 and ia64, certain members of the dirent structure are not guaranteed to be 8 byte aligned on ia64. This requires a compat wrapper around these 32 bit system calls. Other architectures may or may not have the problem, depending on the alignment rules. This was observed by running /emul/ia32-linux/bin/ls on 2.6.6 which produces kernel mode unaligned faults. Original patch by: Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Gordon Jin <gordon.jin@intel.com> Signed-off-by:
Arun Sharma <arun.sharma@intel.com> Signed-off-by:
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Thierry Vignaud authored
- "\<" and "\>" can be safely replaced with "<" and ">" - "$var =~ /^string$/" is better written "$var eq 'string'" - $i is better written without the double quotes - it's not safe to use for without "my"ing the iteration variable - "print foreach @array" is better written "print @array" - declare variables - ".*" is useless at the end of a regexp - "$a[@A] = $foo" is a rather obfuscated syntax for "push @A, $foo"... let's not opencoding language basic operators... - ignoring return value from a regexp is very bad: this can results in working on previous value of $1, $2, ... Signed-off-by:
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Ashok Raj authored
This file provides ability for caller of register_cpu() to either create a control file, or not. This can be handy if a particular platform decides that certain CPU's are not removable. Hence would like to not create a control file. Signed-off-by:
Dave Hansen <haveblue@us.ibm.com> Signed-off-by:
Ashok Raj <ashok.raj@intel.com> Signed-off-by:
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Yury Umanets authored
Adds memory allocation checks in cs46xx_dsp_proc_register_scb_desc() Signed-off-by:
Yury Umanets <torque@ukrpost.net> Signed-off-by:
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Yury Umanets authored
Fixes memory allocation check in mtdblock_open() Signed-off-by:
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Yury Umanets authored
Adds memory allocation checks in eth1394_update(). Signed-off-by:
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Andi Kleen authored
Suggested by Manfred Spraul. __get_free_pages had a hack to do node interleaving allocation at boot time. This patch sets an interleave process policy using the NUMA API for init and the idle threads instead. Before entering the user space init the policy is reset to default again. Result is the same. Advantage is less code and removing of a check from a fast path. Removes more code than it adds. I verified that the memory distribution after boot is roughly the same. Signed-off-by:
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William Lee Irwin III authored
While sweeping the APIC code two points were missed. The first is getting the definition of BAD_APICID available to include/asm-i386/mach-default/mach_apic.h by #including the right header, and the second is UP local APIC without UP IO-APIC linking in get_broadcast_physid(). Signed-off-by:
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William Lee Irwin III authored
Marking invalid APIC ID's in phys_cpu_present_map was intended to generate "collisions" between APIC ID's in order to assist the ordinary bounds checking against the broadcast physical APIC ID. However, this is bounds checked everywhere it's necessary, and it's also not even possible to properly bounds-check everywhere. So this patch removes that marking of non-present physical APIC ID's. Signed-off-by:
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William Lee Irwin III authored
The following patch repairs kicking of non-present cpus by making cpu_present_to_apicid() bounds-check its argument. It also corrects the same issue on NUMA-Q by correctly passing the generated artificial APIC ID instead of the raw value discovered in the MP table. A miscellaneous compilefix for CONFIG_ACPI_BOOT is also included for completeness. Signed-off-by:
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William Lee Irwin III authored
The following patch appears sound according to an audit to ensure that all of the codepaths where it was introduced were called after the APIC fixmappings were set up. This patch introduces get_physical_broadcast(), which checks the version ID of the local APIC to determine whether it's a serial APIC or xAPIC, and returns the correct physical broadcast ID. It replaces all uses of APIC_BROADCAST_ID and IO_APIC_MAX_ID with this in order to ensure. It also changes the checks during MP table parsing so the APIC ID is checked in tandem with the version number. I'm holding out for some kind of testing to get an idea of whether this covers the cases or introduces regressions, or whatever. Signed-off-by:
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Andrew Morton authored
Uninline the non-leaf bit search functions. Saves 9 kbytes from my vmlinux. And gratuitously s/__inline__/inline/ Signed-off-by:
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William Lee Irwin III authored
arch/x86_64/mm/numa.c: In function `numa_initmem_init': arch/x86_64/mm/numa.c:185: error: incompatible types in assignment Signed-off-by:
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Tom L. Nguyen authored
Somehow the change in TARGET_CPUS generated this error in UP environment. Patch below will fix it. Signed-off-by:
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Kevin Corry authored
dm-raid1.c: In rh_exit(), use list_for_each_entry_safe instead of list_for_each_safe. Signed-off-by:
Kevin Corry <kevcorry@us.ibm.com> Signed-off-by:
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Kevin Corry authored
dm-raid1.c: Make struct region::delayed_bios a bio_list instead of a bio*. This will ensure the queued bios are kept in the proper order. Signed-off-by:
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Kevin Corry authored
dm-io: Proper error handling when someone is trying to read from multiple regions. Signed-off-by:
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Kevin Corry authored
Use structure assignments instead of memcpy's. [Suggested by akpm during kcopyd review.] Signed-off-by:
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Kevin Corry authored
Create/destroy kcopyd on demand. This changes kcopyd to initialize its mempool and workqueue only when a client specifically needs to use it. Signed-off-by:
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Kevin Corry authored
Device-Mapper documentation. Signed-off-by:
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Christophe Saout authored
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Kevin Corry authored
Add missing dm-zero version number. From: Alasdair Kergon <agk@redhat.com> Signed-off-by:
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Alasdair G. Kergon authored
Add dm-zero target Signed-off-by:
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Alasdair G. Kergon authored
Add mirror target. Signed-off-by:
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Kevin Corry authored
dm-exception-store.c: Fix error cleanup in dm_create_persistent(). This was originally found by chrisw during code review. From: Dave Olien <dmo@osdl.org> Signed-off-by:
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Alasdair G. Kergon authored
Add snapshot target Signed-off-by:
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Kevin Corry authored
We're also working on some general documentation which will go in Documentation/device-mapper and will include more detailed information about the core driver and the other sub-modules. We'll try to submit those patches in the near future. Signed-off-by:
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Kevin Corry authored
No need to lock kcopyd pages. From: Alasdair Kergon <agk@redhat.com> Signed-off-by:
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