Re: crc32c implementation on x86 with SSE4.2... CONFIG_BTRFS_HW_SUM

2008-10-17 Thread Tomasz Torcz
Dnia 2008-10-16, czw o godzinie 09:49 -0400, Chris Mason pisze: On Thu, 2008-10-16 at 14:40 +0100, Miguel Sousa Filipe wrote: Hi there, I noticed that btrfs, in the git tree, has its own implementation of crc32c for x86 with SSE4.2 that implement a crc32 instruction.. it appears. I

Re: Need some help with a backref problem

2008-10-17 Thread Josef Bacik
On Fri, Oct 17, 2008 at 09:48:58AM +0800, Yan Zheng wrote: 2008/10/17 Josef Bacik [EMAIL PROTECTED]: On Thu, Oct 16, 2008 at 04:54:12PM -0400, Josef Bacik wrote: Hello, Its the end of the day here and I haven't figured this out, so hopefully Yan you can figure this out and I can come

Re: Need some help with a backref problem

2008-10-17 Thread Josef Bacik
On Fri, Oct 17, 2008 at 09:48:58AM +0800, Yan Zheng wrote: 2008/10/17 Josef Bacik [EMAIL PROTECTED]: On Thu, Oct 16, 2008 at 04:54:12PM -0400, Josef Bacik wrote: Hello, Its the end of the day here and I haven't figured this out, so hopefully Yan you can figure this out and I can come

Re: Data-deduplication?

2008-10-17 Thread Valerie Aurora Henson
On Thu, Oct 16, 2008 at 03:30:49PM -0400, Chris Mason wrote: On Thu, 2008-10-16 at 15:25 -0400, Valerie Aurora Henson wrote: Both deduplication and compression have an interesting side effect in which a write to a previously allocated block can return ENOSPC. This is even more exciting

Re: Data-deduplication?

2008-10-17 Thread Christoph Hellwig
On Thu, Oct 16, 2008 at 03:25:01PM -0400, Valerie Aurora Henson wrote: Both deduplication and compression have an interesting side effect in which a write to a previously allocated block can return ENOSPC. This is even more exciting when you factor in mmap. Any thoughts on how to handle this?