D5308: store: don't pass 'atomictemp=True' while appending to fncache

[yuja (Yuya Nishihara)]

yuja added a comment.


  >   > As I said, we'll also need to somehow hide partial data from another
  >   >  reader processes. There's no read lock.
  >   
  >   
  >   Read locks! was there a previous attempt on implementing them? I will try to take a shot at implementing them. I am unable to find any good detail except mentions in wiki or mailing list archive.
  
  Another option is to ignore trailing data after `\n`. That's how the revlog
  parser gets around partially-written entry.
  
  In either way, writing fncache non-atomically wouldn't be strictly compatible
  with older hg clients. I think that's okayish, but I should note that.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5308

To: pulkit, #hg-reviewers
Cc: yuja, mjpieters, mercurial-devel