search for: writeout

Hi. In btrfs, fdatasync and fsync are identical. I think fdatasync should skip committing transaction when inode->i_state is set just I_DIRTY_SYNC and this indicates only atime or/and mtime updates. Following patch improves fdatasync throughput. #sysbench --num-threads=16 --max-requests=10000 --test=fileio --file-block-size=4K --file-total-size=16G --file-test-mode=rndwr

Hi. In ocfs2, fdatasync and fsync are identical. I think fdatasync should skip committing transaction when inode->i_state is set just I_DIRTY_SYNC and this indicates only atime or/and mtime updates. Following patch improves fdatasync throughput. #sysbench --num-threads=16 --max-requests=300000 --test=fileio --file-block-size=4K --file-total-size=16G --file-test-mode=rndwr

Hi all. I have a simple feature request for the devs and maintainers; when forking into the background using the -f optarg one would normally have to consult the process table of whatever OS they're running to find the process. Would you consider adding another optarg to write the PID out to stdout or a pidfile? This would be rather helpful in several usecases. Thanks, -c

...it might be a simple Ruby question too. We have installed Webistrano and Capistrano install on some server (let’s say Server1). I have created a Webistrano project and inside it I have defined my Host to be ‘Server2’. I have this Ruby code inside my project: require ''open-uri'' writeout = open("/home/test/test.txt", "wb") writeout.write(“TEST”) writeout.close The problem is Webistrano is giving me an error saying that /home/test/test.txt does not exist. I believe what It’s trying to do is to create test.txt in Server1 (Capistrano Server) instead of my de...

Hi Chris. I think it is needed to call mark_inode_dirty() when file size expands in order to flush metadata updates to HDD through sync() syscall or background_writeout(). Thanks. Signed-off-by: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp> diff -Nrup linux-2.6.29-rc3.org/fs/btrfs/file.c linux-2.6.29-rc3/fs/btrfs/file.c --- linux-2.6.29-rc3.org/fs/btrfs/file.c 2009-02-02 16:53:18.000000000 +0900 +++ linux-2.6.29-rc3/fs/btrfs/file.c 2009-02-02 18:21:00.000...

...diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 46b4e34..9f1f5f2 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -2129,26 +2129,45 @@ done: } /* - * This function must be called when inode is journaled in ordered mode - * before truncation happens. It starts writeout of truncated part in - * case it is in the committing transaction so that we stand to ordered - * mode consistency guarantees. + * File truncate and transaction commit interact with each other in a + * non-trivial way. If a transaction writing data block A is committing, + * we cannot discard the d...

...; diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index e5d5405..92d77c9 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -2049,26 +2049,46 @@ done: } /* - * This function must be called when inode is journaled in ordered mode - * before truncation happens. It starts writeout of truncated part in - * case it is in the committing transaction so that we stand to ordered - * mode consistency guarantees. + * File truncate and transaction commit interact with each other in a + * non-trivial way. If a transaction writing data block A is + * committing, we cannot discard the...

On Tue, Mar 07, 2023 at 03:31:23PM +0100, Christoph Hellwig wrote: > We do not need to writeout modified directory blocks immediately when > modifying them while the page is locked. It is enough to do the flush > somewhat later which has the added benefit that inode times can be > flushed as well. It also allows us to stop depending on > write_one_page() function. > > Porte...

On Fri, Mar 10, 2023 at 03:53:53AM +0000, Al Viro wrote: > On Tue, Mar 07, 2023 at 03:31:23PM +0100, Christoph Hellwig wrote: > > We do not need to writeout modified directory blocks immediately when > > modifying them while the page is locked. It is enough to do the flush > > somewhat later which has the added benefit that inode times can be > > flushed as well. It also allows us to stop depending on > > write_one_page() functi...

...#39;rb') channels = inwav.getnchannels() vd = ogg.vorbis.VorbisInfo(channels = channels, rate = inwav.getframerate(), quality = 0.2).analysis_init() os = ogg.OggStreamState(5) map(os.packetin, vd.headerout()) og = os.flush() while og: og.writeout(fout) og = os.flush() nsamples = 1024 eos = 0 total = 0 while not eos: data = inwav.readframes(nsamples) total = total + nsamples if not data: vd.write(None) break vd.write_wav(data) #print 100.0 * total / inwav.getnframes() vb = vd.blockout() while...

Hi all, This patchset makes some key modifications to the original ''stable page writes'' patchset. First, it provides users (devices and filesystems) of a backing_dev_info the ability to declare whether or not it is necessary to ensure that page contents cannot change during writeout, whereas the current code assumes that this is true. Second, it relaxes the wait_on_page_writeback calls so that they only occur if something needs it. Third, it fixes up (most) of the remaining filesystems to use this improved conditional-wait logic in the hopes of providing stable page writes o...

Hi, Got the following on Linux 2.5.37 trying to run apt-get update. MikaL Sep 21 23:10:05 devil kernel: Assertion failure in ext3_get_block() at inode.c:853: "handle != 0" Sep 21 23:10:05 devil kernel: kernel BUG at inode.c:853! Sep 21 23:10:05 devil kernel: invalid operand: 0000 Sep 21 23:10:05 devil kernel: CPU: 1 Sep 21 23:10:05 devil kernel: EIP:

Greetings all, I have a question regarding the fsync data corruption bug that was introduced in 2.4.20 when using data=journal. I have patched the 2.4.20 kernel with the 3 sync patches available from zip.com.au, and I am wondering if with these patches the "bug" still exists: sync_fs.patch sync_fs-fix.patch sync_fs-fix-2.patch In addition the following two patches have also

...ared libraries. This would allow the GCDA based profiling to work correctly with code using dlopen/dlclose to load and unload shared libraries. Each shared library must have its own copy of the following GCDA functions: - __gcov_flush - llvm_delete_flush_function_list - llvm_delete_writeout_function_list - llvm_gcda_emit_arcs - llvm_gcda_emit_function - llvm_gcda_end_file - llvm_gcda_increment_indirect_counter - llvm_gcda_start_file - llvm_gcda_summary_info - llvm_gcov_init - llvm_register_flush_function - llvm_register_writeout_function...

Hi all, We are observing a consistent interval of about 4 minutes at which there are large sustained writes to disk that causes mysqld to block and not respond for the entire period. We are using data=journal with a 128M journal and the filesystem is 150GB in size. We get about 300kb/sec in writes and that will jump to about 2000kb/sec during the periods of large sustained writes. Those

...; diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 39b7805..89f63ba 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -2050,26 +2050,46 @@ done: } /* - * This function must be called when inode is journaled in ordered mode - * before truncation happens. It starts writeout of truncated part in - * case it is in the committing transaction so that we stand to ordered - * mode consistency guarantees. + * File truncate and transaction commit interact with each other in a + * non-trivial way. If a transaction writing data block A is + * committing, we cannot discard the...

...S_I(diocb->inode)->root->sectorsize; /* expand lock region to include what we read to validate checksum */ @@ -450,42 +517,25 @@ static void btrfs_dio_read(struct btrfs_diocb *diocb) lockend = ALIGN(end, blocksize) - 1; getlock: - mutex_lock(&diocb->inode->i_mutex); + /* writeout everything we read for checksum or compressed extents */ + filemap_write_and_wait_range(diocb->inode->i_mapping, + diocb->lockstart, lockend); + lock_extent(io_tree, diocb->lockstart, lockend, GFP_NOFS); - /* ensure writeout and btree update on everything - * we might read for che...

...nct, and the kernel has got it wrong for ages. Even now, kupdate is running filemap_fdatawait() quite needlessly) In the early days, ext3 would assume that a write_super() call meant "sync". That worked OK. But that slowed down the kupdate function - it doesn't need to wait on the writeout. So we took the `wait' out of ext3_write_super(). And that worked OK too, because the VFS would later write back all the dirty data for us. But then an unrelated optimisation to the truncate path caused that to not work any more, and we were exposed. This patch adds a new super_block oper...

Hello, I have been looking at the Ruby/EventMachine. First let me say it look very good. Reactor model with no threads makes for fast reliable server, and I have read about marvelous Twisted framework for Python and am glad to see something similar for Ruby. I am writing network app with Ruby threads now and it very slow, and I try new Ruby 1.9 with native threads that make it much slower.

Hi all, this series removes most users of the write_one_page API. These helpers internally call ->writepage which we are gradually removing from the kernel. Changes since v2: - more minix error handling fixes Changes since v1: - drop the btrfs changes (queue up in the btrfs tree) - drop the finaly move to jfs (can't be done without the btrfs patches) - fix the existing minix code to