Messages in this thread | | | Date | Wed, 17 Jul 2013 17:17:36 -0700 | Subject | Re: splice vs execve lockdep trace. | From | Linus Torvalds <> |
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On Wed, Jul 17, 2013 at 4:40 PM, Ben Myers <bpm@sgi.com> wrote: >> >> We're still talking at cross purposes then. >> >> How the hell do you handle mmap() and page faulting? > > __xfs_get_blocks serializes access to the block map with the i_lock on the > xfs_inode. This appears to be racy with respect to hole punching.
Would it be possible to just make __xfs_get_blocks get the i_iolock (non-exclusively)?
Or, alternatively, do it in the readpage() function?
That was what I thought you did anyway. Exactly because of the whole page faulting issue.
Linus
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