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Added a note about munmap not calling flush.

geesefs-0-30-9
Aaron Jacobs 2015-03-23 11:39:02 +11:00
parent 2728137e7d
commit 83d4308afe
1 changed files with 4 additions and 0 deletions
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4
file_system.go
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@ -242,6 +242,10 @@ type FileSystem interface {
// case of close(2), a flush error is returned to the user. For dup2(2), it
// is not.
//
// Note that one potentially significant case where this is *not* called is
// munmap(2). (Cf. http://goo.gl/7n1r9X, fuse-devel mailing list thread from
// Han-Wen Nienhuys on 2014-10-08.)
//
// Because of cases like dup2(2), calls to FlushFile are not necessarily one
// to one with calls to OpenFile. They should not be used for reference
// counting, and the handle must remain valid even after the method is called