388 reputation
320
bio website google.com
location Russia
age 28
visits member for 4 years, 11 months
seen yesterday
Linux programmer and admin. Experience with FreeBSD, OpenBSD, Linux (RH, D., U.), Solaris. Deep knowledge of glibc internals.

Mar
5
accepted disable mod_proxy for subdirectory (apache)
Mar
5
asked disable mod_proxy for subdirectory (apache)
Mar
5
comment irc server and web irc-client for debian
irc soft for APT repository is easier for me to setup.
Mar
5
comment irc server and web irc-client for debian
no, i need chat for intranet.
Mar
4
asked irc server and web irc-client for debian
Mar
1
comment XScope program for Linux/XFree or X.Org
I use LFS. Does XScope needs a sources/headers from very recent X.org?
Feb
28
asked XScope program for Linux/XFree or X.Org
Feb
26
revised “#< #5.1.3 SMTP; 553 sorry, your domain does not exists.> #SMTP#”
added 176 characters in body
Feb
26
comment “#< #5.1.3 SMTP; 553 sorry, your domain does not exists.> #SMTP#”
sorry, domain3 is FQDN, it has public dns. So does domain1.
Feb
26
asked “#< #5.1.3 SMTP; 553 sorry, your domain does not exists.> #SMTP#”
Feb
26
revised exim4 - disable autoreplies about “SMTP error from remote mail server after RCPT”
added 63 characters in body
Feb
26
comment exim4 - disable autoreplies about “SMTP error from remote mail server after RCPT”
Do exim4 check recipient with VRFY by default? For now I have problems with root access to internal server (it is on remote location and it is admined by other people). I need a quick-fix, it can be even post-filter on exim4 - which will delete all messages contained "User unknown" and "[10.0.0.1]: 550 5.1.1"
Feb
26
asked exim4 - disable autoreplies about “SMTP error from remote mail server after RCPT”
Feb
7
answered Caching/preloading files on Linux into RAM
Feb
7
comment Caching/preloading files on Linux into RAM
Very good hack, but such hack doesn't disable a lot of waiting fsyncs from mysql :( fsyncs are needed to ensure ACID (Atomicity, Consistency, Isolation, Durability).
Feb
7
comment Which OS/distributions have 64-bit kernel and 32-bit userspace?
"The behavior of those instructions is to make the upper 32 bits all zeros." For which mode? For 64bit mode it is true, but is it true for 32bit applications with 64 bit kernel (IA-32e, submode Compatibility)? "The default operand size for most instructions is 32 bits" but default address size in 64 bit mode IS 64.
Feb
6
comment Which OS/distributions have 64-bit kernel and 32-bit userspace?
@Jim B, What section do you refer in manual vol1 ? 9.2 of "optimization" says directly: "Assembly/Compiler Coding Rule 65. (H impact, M generality) Use the 32-bit versions of instructions in 64-bit mode to reduce code size unless the 64-bit version is necessary to access 64-bit data or additional registers. " .. "but the 32-bit version saves one instruction byte:" (REX prefix). Also from 3.2 section of "optimization": Instruction decode throughput is important for processors based on Intel Core i7 processors, Intel Core microarchitecture
Feb
6
comment Which OS/distributions have 64-bit kernel and 32-bit userspace?
Hmm. Do you install entire 32-bit os? Can you use gcc for 64-bit mode? Is there 64 and 32 bit libc for large programs which must be 64bit, like multi-gb database?
Feb
6
revised Which OS/distributions have 64-bit kernel and 32-bit userspace?
must->can for database
Feb
6
comment Which OS/distributions have 64-bit kernel and 32-bit userspace?
@phoebus - And you greatly underestimate negative impact of 64-bit programs. Every pointer in 64 have a unneeded extra 32 bit. They are really unused. @Jim B, In case of x86_64 - 64bit code requires more prefixes and more decoding, than 32 bit. Can you give me a link to article describing slow speed of 32bit code on 64?