Re: [PATCH ] VMSPLIT config options (with default config fixed)

>> >> What userspace programs do depend on it?
>> >
>> >there is a lot of userspace that assumes they can do 2Gb or even close
>> >to 3Gb of memory allocations. Databases, java, basically anything with
>> >threads. Sure for most of these its a configuration option to reduce
>> >this, but that still doesn't mean it's a good idea to change from the
>> >existing behavior...
>> > 
>> Not to mention that these (almost(*)) fail anyway when you have less than 2 
>> GB of RAM.
>
>it's not really overcommit... it can also be file mmaps or shared mmaps
>of say tmpfs files (the later is common with oracle actually)
>

So, just as I did in the sample patch, the manual split shall depend on 
EMBEDDED. Those who run fat databases with big malloc/mmap assumptions 
don't probably belong to the group using CONFIG_EMBEDDED.


Jan Engelhardt
-- 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Herbert Poetzl <[email protected]>

• References:
  • Re: 2G memory split
    • From: Ingo Molnar <[email protected]>
  • Re: 2G memory split
    • From: Jens Axboe <[email protected]>
  • Re: 2G memory split
    • From: Byron Stanoszek <[email protected]>
  • Re: 2G memory split
    • From: Jens Axboe <[email protected]>
  • Re: 2G memory split
    • From: Linus Torvalds <[email protected]>
  • Re: 2G memory split
    • From: Mark Lord <[email protected]>
  • Re: 2G memory split
    • From: Jens Axboe <[email protected]>
  • Re: 2G memory split
    • From: Mark Lord <[email protected]>
  • Re: 2G memory split
    • From: Mark Lord <[email protected]>
  • [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Mark Lord <[email protected]>
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Herbert Poetzl <[email protected]>
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: [email protected] (Ulrich Mueller)
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Jan Engelhardt <[email protected]>
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Mark Lord <[email protected]>
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Jan Engelhardt <[email protected]>
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Arjan van de Ven <[email protected]>
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Jan Engelhardt <[email protected]>
  • Re: [PATCH ] VMSPLIT config options (with default config fixed)
    • From: Arjan van de Ven <[email protected]>

• Prev by Date: Several Hangs on diferent Hardwares and diferent kernels
• Next by Date: Re: CD writing in future Linux (stirring up a hornets' nest)
• Previous by thread: Re: [PATCH ] VMSPLIT config options (with default config fixed)
• Next by thread: Re: [PATCH ] VMSPLIT config options (with default config fixed)
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]