| --- | Log | opened Mon Jan 14 00:00:55 2008 |
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| 10:05 | <jdike:#uml> | Hi guys |
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| 12:31 | -!- | Netsplit osmotic.oftc.net <-> xenon.oftc.net quits: JDLSpeedy, tasaro, linbot, aindilis, caker |
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| 12:44 | * | jdike:#uml gets a new release of skas4 ready |
| 12:47 | <jdike:#uml> | 32-on-64 support |
| 12:47 | <jdike:#uml> | and better PTRACE_GETSIGINFO detection |
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| 12:54 | <jdike:#uml> | 32-bit guest is OK |
| 12:54 | <jdike:#uml> | 32-bit on 64-bit is OK |
| 12:55 | <jcpiza:#uml> | jdike: with or without 32-bit PAE? |
| 12:55 | <jdike:#uml> | doesn't matter |
| 12:55 | <jdike:#uml> | PAE is invisible to userspace |
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| 12:56 | <jcpiza:#uml> | but if the machine x64 has 8 GiB of RAM and lower 4 GiB is busy, then how to use the higher 4 GiB in 32-bit processes? |
| 12:57 | <jdike:#uml> | PAE |
| 12:58 | <jdike:#uml> | but userspace can't tell whether it's getting < 4G or >4G memory |
| 12:58 | <jcpiza:#uml> | the problem is the lack of 32-bit physical addresses of pages |
| 12:59 | <jcpiza:#uml> | although there are 32-bit virtual addresses for many processes |
| 13:00 | <jdike:#uml> | with PAE and three-level page tables, that's not a problem |
| 13:01 | <jcpiza:#uml> | ok |
| 13:02 | <jdike:#uml> | 32-bit host is OK |
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| 13:09 | <fo0bar:#uml> | jdike: did you change PTRACE_SWITCH_MM from 55 to 33 because the new PTRACE_SWITCH_MM is incompatible with the old? |
| 13:09 | <jdike:#uml> | No |
| 13:10 | <jdike:#uml> | I put it there because that's the value I intend to have merged |
| 13:10 | <fo0bar:#uml> | ahh |
| 13:12 | <jdike:#uml> | 55 was used so as not to conflict with any ptrace additions that might appear in mainline |
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| 13:17 | <jdike:#uml> | 64-bit guest is OK |
| 13:19 | <fo0bar:#uml> | sweet |
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| 15:34 | <jdike:#uml> | 64-bit host is OK for 64-bit guest |
| 15:34 | <jdike:#uml> | not for 32-bit guest |
| 15:48 | <jdike:#uml> | both 32 and 64-bit guests are OK on 64-bit |
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| --- | Log | closed Tue Jan 15 00:00:31 2008 |
