On 04/19/2014 09:10 AM, Michael Kerrisk (man-pages) wrote:
On Sat, Apr 19, 2014 at 8:55 AM, Davidlohr Bueso <davidlohr@xxxxxx> wrote:
On Fri, 2014-04-18 at 11:18 +0200, Manfred Spraul wrote:
Risks:
- The patch breaks installations that use "take current value and increase
it a bit". [seems to exist, http://marc.info/?l=linux-mm&m=139638334330127]
This really scares me. The probability of occurrence is now much higher,
and not just theoretical. It would legitimately break userspace.
I'm missing something. Manfred's patch doesn't actually change the
behavior on this point does it? If the problem is more than
theoretical, then it _already_ affects users, right? (And they would
therefore already be working around the problem.)
The current default is 32 MB. if some increases it by 1 MB, then the
result is 33 MB.
The new default would be ULONG_MAX. If someone increases it by 1 MB,
then the result is 1 MB - 1 byte.
--
Manfred
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