ia64, sparc and mips have non 4k page sizes, and even a page size that varies depending on the kernel or maybe the cpu model.
Created attachment 785361 [details] [diff] [review] Don't use static page size on ia64, sparc and mips
Attachment #785361 - Flags: review?(justin.lebar+bug)
Attachment #785361 - Flags: review?(justin.lebar+bug) → review+
Status: NEW → RESOLVED
Last Resolved: 5 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla25
Comment on attachment 785361 [details] [diff] [review] Don't use static page size on ia64, sparc and mips [Approval Request Comment] Requesting for beta because i'd like this in ESR24 so that I don't have to carry the patch around for the ESR. User impact if declined: Runtime failure because of page size size not matching what jemalloc expects on ia64, sparc and mips. Testing completed (on m-c, etc.): Tested on a ia64, sparc and mips. Risk to taking this patch (and alternatives if risky): NPOTB. String or IDL/UUID changes made by this patch: None
Attachment #785361 - Flags: approval-mozilla-beta?
Attachment #785361 - Flags: approval-mozilla-beta? → approval-mozilla-beta+
status-firefox24: --- → fixed
status-firefox25: --- → fixed
This is the case on powerpc as well. Please add it to the list. Note that this is a terrible design decision to begin with. I sincerely hope the code can be reworked to no longer make that assumption (or at least stick to something like "maximum" page size if that can help).
FWIW we saw a significant improvement on our whole-browser benchmarks when we switched to using a static page size. Trading that for breakage on our tier-three platforms doesn't seem "terrible" to me. I don't think we have any plans to get rid of this assumption for platforms where it's a correct assumption.
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