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* [Bug libc/17204] New: race condition in nice
@ 2014-07-27 4:39 sstewartgallus00 at mylangara dot bc.ca
2014-07-27 7:13 ` [Bug libc/17204] " schwab@linux-m68k.org
0 siblings, 1 reply; 2+ messages in thread
From: sstewartgallus00 at mylangara dot bc.ca @ 2014-07-27 4:39 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17204
Bug ID: 17204
Summary: race condition in nice
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: sstewartgallus00 at mylangara dot bc.ca
CC: drepper.fsp at gmail dot com
nice is implemented as calling getpriority and than setting the priority as
higher and than calling getpriority again but this is racy as other tasks can
call setpriority concurrently. This bug probably doesn't actually cause any
problems but it could still be fixed. Fixing this bug would also reduce the
amount of system calls by one which would be nice. Glibc should not call
getpriority to get the new value of the priority after.
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* [Bug libc/17204] race condition in nice
2014-07-27 4:39 [Bug libc/17204] New: race condition in nice sstewartgallus00 at mylangara dot bc.ca
@ 2014-07-27 7:13 ` schwab@linux-m68k.org
0 siblings, 0 replies; 2+ messages in thread
From: schwab@linux-m68k.org @ 2014-07-27 7:13 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17204
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
It is impossible in general to know the correct return value without calling
getpriority.
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2014-07-27 4:39 [Bug libc/17204] New: race condition in nice sstewartgallus00 at mylangara dot bc.ca
2014-07-27 7:13 ` [Bug libc/17204] " schwab@linux-m68k.org
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