Issue #4526 has been reported by Eric Wong.

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Bug #4526: [PATCH] IO#syswrite releases GVL
http://redmine.ruby-lang.org/issues/4526

Author: Eric Wong
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: 1.9.x
ruby -v: ruby 1.9.3dev (2011-03-25 trunk 31173) [x86_64-linux]


While local FS writes are usually buffered, the buffers can be
full or the file opened with O_SYNC.  IO#syswrite can also be
used on blocking IOs (pipe/socket) just like IO#write.



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