On 04/19/2014 10:45 AM, Manfred Spraul wrote: > 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. Ahh. Got it now--sorry for being slow. -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>