[Bug nptl/22637] New: guard size is subtracted from thread stack size instead of adding it on top

[nszabolcs at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=22637

            Bug ID: 22637
           Summary: guard size is subtracted from thread stack size
                    instead of adding it on top
           Product: glibc
           Version: 2.27
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: nptl
          Assignee: unassigned at sourceware dot org
          Reporter: nszabolcs at gmail dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

this is related to bug 11787, but only about the guard size instead of tls
accounting.

requesting large guardsize can result in tiny actually usable stack now.

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