- 11 4月, 2006 7 次提交
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由 Jens Axboe 提交于
The comment is also somewhat out of date, correct that as well. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
Also corrects a few comments. Patch mainly from Ingo, changes by me. Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
- Kill the local variables that cache ->nrbufs, they just take up space. - Only set do_wakeup for a real pipe. This is a big win for direct splicing. - Kill i_mutex lock around ->f_pos update, regular io paths don't do this either. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Ingo Molnar 提交于
more code cleanups after the macro conversion: - standardize on 'struct pipe_inode_info *pipe' variable names - introduce 'pipe' temporaries to reduce mass inode->i_pipe dereferencing Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Ingo Molnar 提交于
get rid of the PIPE_*() macros. Scripted transformation. Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
Using find_get_page() is a lot faster than find_or_create_page(). This gets splice a lot closer to sendfile() for fd -> socket transfers. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
It's more efficient for sendfile() emulation. Basically we cache an internal private pipe and just use that as the intermediate area for pages. Direct splicing is not available from sys_splice(), it is only meant to be used for sendfile() emulation. Additional patch from Ingo Molnar to avoid the PIPE_BUFFERS loop at exit for the normal fast path. Signed-off-by: NJens Axboe <axboe@suse.de>
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- 10 4月, 2006 8 次提交
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由 Ingo Molnar 提交于
add optional input and output offsets to sys_splice(), for seekable file descriptors: asmlinkage long sys_splice(int fd_in, loff_t __user *off_in, int fd_out, loff_t __user *off_out, size_t len, unsigned int flags); semantics are straightforward: f_pos will be updated with the offset provided by user-space, before the splice transfer is about to begin. Providing a NULL offset pointer means the existing f_pos will be used (and updated in situ). Providing an offset for a pipe results in -ESPIPE. Providing an invalid offset pointer results in -EFAULT. Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Ingo Molnar 提交于
separate out the 'internal pipe object' abstraction, and make it usable to splice. This cleans up and fixes several aspects of the internal splice APIs and the pipe code: - pipes: the allocation and freeing of pipe_inode_info is now more symmetric and more streamlined with existing kernel practices. - splice: small micro-optimization: less pointer dereferencing in splice methods Signed-off-by: NIngo Molnar <mingo@elte.hu> Update XFS for the ->splice_read/->splice_write changes. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
We don't want to call into the read-ahead logic unless we are at the start of a page, _or_ we have multiple pages to read. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
We don't really need to lock down the pages, just make sure they are uptodate. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
The whole shadow/pages logic got overly complex, and this simpler approach is actually faster in testing. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
__wake_up_common() is pretty heavy in the kernel profiles, this brings it down to a more acceptable level. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Dave Jones 提交于
We can get to out: with a NULL page, which we probably don't want to be calling page_cache_release() on. Signed-off-by: NDave Jones <davej@redhat.com> Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
We should do that, since we do the LRU manipulation ourselves now. Suggested by Nick Piggin. Signed-off-by: NJens Axboe <axboe@suse.de>
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- 03 4月, 2006 9 次提交
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由 Jens Axboe 提交于
Originally from Nick Piggin, just adapted to the newer branch. You can't check PageLRU without holding zone->lru_lock. The page release code can get away with it only because the page refcount is 0 at that point. Also, you can't reliably remove pages from the LRU unless the refcount is 0. Ever. Signed-off-by: NNick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
Thanks to Andrew for the good explanation of why this is so. akpm writes: If a page is under writeback and we remove it from pagecache, it's still going to get written to disk. But the VFS no longer knows about that page, nor that this page is about to modify disk blocks. So there might be scenarios in which those blocks-which-are-about-to-be-written-to get reused for something else. When writeback completes, it'll scribble on those blocks. This won't happen in ext2/ext3-style filesystems in normal mode because the page has buffers and try_to_release_page() will fail. But ext2 in nobh mode doesn't attach buffers at all - it just sticks the page in a BIO, finds some new blocks, points the BIO at those blocks and lets it rip. While that write IO's in flight, someone could truncate the file. Truncate won't block on the writeout because the page isn't in pagecache any more. So truncate will the free the blocks from the file under the page's feet. Then something else can reallocate those blocks. Then write data to them. Now, the original write completes, corrupting the filesystem. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
Forgot that one, thanks Jeff. Also move the other EXPORT_SYMBOL to right below the functions. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
This lets userspace indicate whether more data will be coming in a subsequent splice call. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
Hopefully this will make Andrew a little more happy. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
By cleaning up the writeback logic (killing write_one_page() and the manual set_page_dirty()), we can get rid of ->stolen inside the pipe_buffer and just keep it local in pipe_to_file(). This also adds dirty page balancing logic and O_SYNC handling. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
Clear the entire range, and don't increment pidx or we keep filling the same position again and again. Thanks to KAMEZAWA Hiroyuki. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Greg Kroah-Hartman 提交于
No one should be writing a PAGE_SIZE worth of data to a normal sysfs file, so properly terminate the buffer. Thanks to Al Viro for pointing out my supidity here. Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Linus Torvalds 提交于
It doesn't make the splice itself necessarily nonblocking (because the actual file descriptors that are spliced from/to may block unless they have the O_NONBLOCK flag set), but it makes the splice pipe operations nonblocking. Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 02 4月, 2006 7 次提交
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由 Martin Waitz 提交于
This patch updates the comments to match the actual code. Signed-off-by: NMartin Waitz <tali@admingilde.org> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner and can better optimized away Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner and can better optimized away Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner and can better optimized away Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 01 4月, 2006 9 次提交
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner and can better optimized away Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Eric Sesterhenn 提交于
this changes if() BUG(); constructs to BUG_ON() which is cleaner and can better optimized away Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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由 Steve French 提交于
extra path. Since cifs_unlink can also be called from rename path and there was one report of oops am making the extra check for null inode. Signed-off-by: NSteve French <sfrench@us.ibm.com>
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由 Steve French 提交于
Fixes Samba bug 3621 and kernel.org bug 6147 For servers which require SMB/CIFS packet signing, we were sending the wrong signature (all zeros) on SMB Read request. The new cifs routine to do signatures across an iovec was not complete - and SMB Read, unlike the new SMBWrite2, did not fall back to the older routine (ie use SendReceive vs. the more efficient SendReceive2 ie used the older cifs_sign_smb vs. the disabled cifs_sign_smb2) for calculating signatures. This finishes up cifs_sign_smb2/cifs_calc_signature2 so that the callers of SendReceive2 can get SMB/CIFS packet signatures. Now that cifs_sign_smb2 is supported, we could start using it in the write path but this smaller fix does not include the change to use SMBWrite2 when signatures are required (which when enabled will make more Writes more efficient and alloc less memory). Currently Write2 is only used when signatures are not required at the moment but after more testing we will enable that as well). Thanks to James Slepicka and Sam Flory for initial investigation. Signed-off-by: NSteve French <sfrench@us.ibm.com>
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由 Jes Sorensen 提交于
Commit 70674f95: [PATCH] Optimize select/poll by putting small data sets on the stack resulted in the poll stack being 4-byte aligned on 64-bit architectures, causing misaligned accesses to elements in the array. This patch fixes it by declaring the stack in terms of 'long' instead of 'char'. Force alignment of poll and select stacks to long to avoid unaligned access on 64 bit architectures. Signed-off-by: NJes Sorensen <jes@sgi.com> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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