- 26 Mar, 2006 40 commits
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Mingming Cao authored
Optimize the block reservation and the multiple block allocation: with the knowledge of the total number of blocks ahead, set or adjust the reservation window size properly (based on the number of blocks needed) before block allocation happens: if there isn't any reservation yet, make sure the reservation window equals to or greater than the number of blocks needed, before create an reservation window; if a reservation window is already exists, try to extends the window size to match the number of blocks to allocate. This could increase the possibility of completing multiple blocks allocation in a single request, as blocks are only allocated in the range of the inode's reservation window. Signed-off-by:
Mingming Cao <cmm@us.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Mingming Cao authored
Update accounting information (quota, boundary checks, free blocks number etc) in ext3_new_blocks(). Signed-off-by:
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Mingming Cao authored
Change ext3_try_to_allocate() (called via ext3_new_blocks()) to try to allocate the requested number of blocks on a best effort basis: After allocated the first block, it will always attempt to allocate the next few(up to the requested size and not beyond the reservation window) adjacent blocks at the same time. Signed-off-by:
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Mingming Cao authored
Add support for multiple block allocation in ext3-get-blocks(). Look up the disk block mapping and count the total number of blocks to allocate, then pass it to ext3_new_block(), where the real block allocation is performed. Once multiple blocks are allocated, prepare the branch with those just allocated blocks info and finally splice the whole branch into the block mapping tree. Signed-off-by:
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Mingming Cao authored
Currently ext3_get_block() only maps or allocates one block at a time. This is quite inefficient for sequential IO workload. I have posted a early implements a simply multiple block map and allocation with current ext3. The basic idea is allocating the 1st block in the existing way, and attempting to allocate the next adjacent blocks on a best effort basis. More description about the implementation could be found here: http://marc.theaimsgroup.com/?l=ext2-devel&m=112162230003522&w=2 The following the latest version of the patch: break the original patch into 5 patches, re-worked some logicals, and fixed some bugs. The break ups are: [patch 1] Adding map multiple blocks at a time in ext3_get_blocks() [patch 2] Extend ext3_get_blocks() to support multiple block allocation [patch 3] Implement multiple block allocation in ext3-try-to-allocate (called via ext3_new_block()). [patch 4] Proper accounting updates in ext3_new_blocks() [patch 5] Adjust reservation window size properly (by the given number of blocks to allocate) before block allocation to increase the possibility of allocating multiple blocks in a single call. Tests done so far includes fsx,tiobench and dbench. The following numbers collected from Direct IO tests (1G file creation/read) shows the system time have been greatly reduced (more than 50% on my 8 cpu system) with the patches. 1G file DIO write: 2.6.15 2.6.15+patches real 0m31.275s 0m31.161s user 0m0.000s 0m0.000s sys 0m3.384s 0m0.564s 1G file DIO read: 2.6.15 2.6.15+patches real 0m30.733s 0m30.624s user 0m0.000s 0m0.004s sys 0m0.748s 0m0.380s Some previous test we did on buffered IO with using multiple blocks allocation and delayed allocation shows noticeable improvement on throughput and system time. This patch: Add support of mapping multiple blocks in one call. This is useful for DIO reads and re-writes (where blocks are already allocated), also is in line with Christoph's proposal of using getblocks() in mpage_readpage() or mpage_readpages(). Signed-off-by:
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Takashi Sato authored
This fix was proposed by Trond Myklebust. He says: The type "sector_t" is heavily tied in to the block layer interface as an offset/handle to a block, and is subject to a supposedly block-specific configuration option: CONFIG_LBD. Despite this, it is used in struct kstatfs to save a couple of bytes on the stack whenever we call the filesystems' ->statfs(). So kstatfs's entries related to blocks are invalid on statfs64 for a network filesystem which has more than 2^32-1 blocks when CONFIG_LBD is disabled. - struct kstatfs Change the type of following entries from sector_t to u64. f_blocks f_bfree f_bavail f_files f_ffree Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
Takashi Sato <sho@tnes.nec.co.jp> Signed-off-by:
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Andrew Morton authored
Cc: Takashi Sato <sho@tnes.nec.co.jp> Signed-off-by:
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Takashi Sato authored
Add blkcnt_t as the type of inode.i_blocks. This enables you to make the size of blkcnt_t either 4 bytes or 8 bytes on 32 bits architecture with CONFIG_LSF. - CONFIG_LSF Add new configuration parameter. - blkcnt_t On h8300, i386, mips, powerpc, s390 and sh that define sector_t, blkcnt_t is defined as u64 if CONFIG_LSF is enabled; otherwise it is defined as unsigned long. On other architectures, it is defined as unsigned long. - inode.i_blocks Change the type from sector_t to blkcnt_t. Signed-off-by:
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Takashi Sato authored
This patch series fixes the following problems on 32 bits architecture. o stat64 returns the lower 32 bits of blocks, although userland st_blocks has 64 bits, because i_blocks has only 32 bits. The ioctl with FIOQSIZE has the same problem. o As Dave Kleikamp said, making >2TB file on JFS results in writing an invalid block number to disk inode. The cause is the same as above too. o In generic quota code dquot_transfer(), the file usage is calculated from i_blocks via inode_get_bytes(). If the file is over 2TB, the change of usage is less than expected. The cause is the same as above too. o As Trond Myklebust said, statfs64's entries related to blocks are invalid on statfs64 for a network filesystem which has more than 2^32-1 blocks with CONFIG_LBD disabled. [PATCH 3/3] We made patches to fix problems that occur when handling a large filesystem and a large file. It was discussed on the mails titled "stat64 for over 2TB file returned invalid st_blocks". Signed-off-by:
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Matthew Dobson authored
Modify well over a dozen mempool users to call mempool_create_slab_pool() rather than calling mempool_create() with extra arguments, saving about 30 lines of code and increasing readability. Signed-off-by:
Matthew Dobson <colpatch@us.ibm.com> Signed-off-by:
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Matthew Dobson authored
Create a simple wrapper function for the common case of creating a slab-based mempool. Signed-off-by:
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Matthew Dobson authored
This patch changes a mempool user, which is basically just a wrapper around kzalloc(), to use the common mempool_kmalloc/kfree, rather than its own wrapper function, removing duplicated code. Signed-off-by:
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Matthew Dobson authored
Add another allocator to the common mempool code: a kzalloc/kfree allocator This will be used by the next patch in the series to replace a mempool-backed kzalloc allocator. It is also very likely that there will be more users in the future. Signed-off-by:
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Matthew Dobson authored
This patch changes several mempool users, all of which are basically just wrappers around kmalloc(), to use the common mempool_kmalloc/kfree, rather than their own wrapper function, removing a bunch of duplicated code. Signed-off-by:
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Matthew Dobson authored
Add another allocator to the common mempool code: a kmalloc/kfree allocator This will be used by the next patch in the series to replace duplicate mempool-backed kmalloc allocators in several places in the kernel. It is also very likely that there will be more users in the future. Signed-off-by:
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Matthew Dobson authored
Convert two mempool users that currently use their own mempool-backed page allocators to use the generic mempool page allocator. Also included are 2 trivial whitespace fixes. Signed-off-by:
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Matthew Dobson authored
This will be used by the next patch in the series to replace duplicate mempool-backed page allocators in 2 places in the kernel. It is also likely that there will be more users in the future. Signed-off-by:
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Steffen Klassert authored
Update driver documentation. Signed-off-by:
Steffen Klassert <klassert@mathematik.tu-chemnitz.de> Signed-off-by:
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Steffen Klassert authored
Remove some whitespaces and codingstyle issues. Signed-off-by:
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Steffen Klassert authored
Remove per-driver versioning. Signed-off-by:
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Steffen Klassert authored
Use ethtool_op_get_link instead of vortex_get_link. Signed-off-by:
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Steffen Klassert authored
Handle netif_carrier_{on,of} also if media is forced to 10baseT/100baseTx. Signed-off-by: -
Steffen Klassert authored
Set the polling interval for media changes to 5 seconds if link is down and 60 seconds if link is up. Signed-off-by:
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Steffen Klassert authored
Check for media changes and netif_carrier by using mii_check_media() if mii is used. Signed-off-by:
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Jason Gunthorpe authored
I noticed that after boot with an initrd in 2.6.16 the rootfs had: --w-r-xr-T 1 root root 6241141 Jan 1 1970 initrd.image Which is caused by a small typo: Signed-off-by:
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Eric Sesterhenn authored
Fix compilation for sound/oss/vwsnd.o, by moving li_destroy() above li_create() sound/oss/vwsnd.c:275: warning: conflicting types for âli_destroyâ sound/oss/vwsnd.c:275: error: static declaration of âli_destroyâ follows non-static declaration sound/oss/vwsnd.c:264: error: previous implicit declaration of âli_destroyâ was here Signed-off-by:
Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by:
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H. Peter Anvin authored
Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: Zdenek Pavlas <pavlas@nextra.cz> Signed-off-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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maximilian attems authored
The isicom driver uses request_firmware() and thus needs to select FW_LOADER. Signed-off-by:
maximilian attems <maks@sternwelten.at> Signed-off-by:
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Darren Jenkins authored
Coverity found an over-run @ line 364 of efi.c This is due to the loop checking the size correctly, then adding a '\0' after possibly hitting the end of the array. Ensure the loop exits with one space left in the array. Signed-off-by:
Darren Jenkins <darrenrjenkins@gmail.com> Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Andrew Morton authored
drivers/input/touchscreen/ads7846.c: In function `ads7846_read12_ser': drivers/input/touchscreen/ads7846.c:207: warning: implicit declaration of function `disable_irq' drivers/input/touchscreen/ads7846.c:209: warning: implicit declaration of function `enable_irq' Cc: Dmitry Torokhov <dtor_core@ameritech.net> Signed-off-by:
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Andrew Morton authored
Since the addition of boot_cpu_init(), fixup_cpu_present_map() has been a no-op. That's because fixup_cpu_present_map() won't touch cpu_present_map if it has any bits set, and boot_cpu_init() sets a bit. So remove fixup_cpu_present_map(). A consequence of this (actually of the boot_cpu_init() change) is that the architecture _must_ populate cpu_present_map itself (probably in smp_prepare_cpus()). fixup_cpu_present_map() won't do it any more. If the architecture doesn't do this, it'll only bring up a single CPU. The other side effect (though less serious) is that smp_prepare_boot_cpu() no longer needs to mark the boot cpu in the online and present maps - boot_cpu_init() does that for everyone (to make early printks work). Signed-off-by:
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Andrew Morton authored
tlclk calls register_chrdev() and permits register_chrdev() to allocate the major, but it promptly forgets what that major was. So if there's no hardware present you still get "telco_clock" appearing in /proc/devices and, I assume, an oops reading /proc/devices if tlclk was a module. Fix. Mark, I'd suggest that that we not call register_chrdev() until _after_ we've established that the hardware is present. Cc: Mark Gross <mgross@linux.intel.com> Cc: <stable@kernel.org> Signed-off-by:
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Herbert Poetzl authored
Check that kernel_thread() succeeded, so we don't wait for something which cannot happen. Signed-off-by:
Herbert Poetzl <herbert@13thfloor.at> Signed-off-by:
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Maneesh Soni authored
Change proc_dir_entry->size to be loff_t to represent files like /proc/vmcore for 32bit systems with more than 4G memory. Needed for seeing correct size for /proc/vmcore for 32-bit systems with > 4G RAM. Signed-off-by:
Maneesh Soni <maneesh@in.ibm.com> Signed-off-by:
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Stephen Rothwell authored
Create compat_sys_adjtimex and use it an all appropriate places. Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: Arnd Bergmann <arnd@arndb.de> Acked-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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Stephen Rothwell authored
We had a copy of the compatibility version of struct timex in each 64 bit architecture. This patch just creates a global one and replaces all the usages of the old ones. Signed-off-by:
Kyle McMartin <kyle@parisc-linux.org> Acked-by:
Tony Luck <tony.luck@intel.com> Acked-by:
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Andy Adamson authored
Update the NFSv4 server to use the new posix_lock_file_conf() interface. Remove unnecessary (and race-prone) posix_test_file() calls. Signed-off-by:
Andy Adamson <andros@citi.umich.edu> Signed-off-by:
J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by:
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Andy Adamson authored
Lockd and the NFSv4 server both exercise a race condition where posix_test_lock() is called either before or after posix_lock_file() to deal with a denied lock request due to a conflicting lock. Remove the race condition for the NFSv4 server by adding a new conflicting lock parameter to __posix_lock_file() , changing the name to __posix_lock_file_conf(). Keep posix_lock_file() interface, add posix_lock_conf() interface, both call __posix_lock_file_conf(). [akpm@osdl.org: Put the EXPORT_SYMBOL() where it belongs] Signed-off-by:
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J. Bruce Fields authored
BUG instead of handling a case that should never happen. Signed-off-by:
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Eric Dumazet authored
I discovered on oprofile hunting on a SMP platform that dentry lookups were slowed down because d_hash_mask, d_hash_shift and dentry_hashtable were in a cache line that contained inodes_stat. So each time inodes_stats is changed by a cpu, other cpus have to refill their cache line. This patch moves some variables to the __read_mostly section, in order to avoid false sharing. RCU dentry lookups can go full speed. Signed-off-by:
Eric Dumazet <dada1@cosmosbay.com> Signed-off-by:
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