search for: map_noreserv

While debugging Scudo on ChromeOS, we found that the no reserve mode immediately crashed `sshd`. We tracked it down to the sandbox-seccomp-filter. Being able to mmap with MAP_NORESERVE is useful (if not necessary) for some overcommitting allocators. During mmap calls, the flag MAP_NORESERVE is used by some allocators such as LLVM's Scudo for layout optimisation. This causes the sandbox seccomp filter for the client subprocess to die with some Scudo configurations. --- sand...

I'm testing both sunfreeware and official sun (sfw) samba on Solaris 10. For some reason since yesterday, the smbd process just "hangs" at the start. No log is generated on server side Where smbd is started, I can't find any open port on 139 or 145 My OS is Solaris 10 # uname -a SunOS labo2 5.10 Generic_142900-13 sun4v sparc SUNW,SPARC-Enterprise-T5120 #

On Fri, Apr 18, 2014 at 2:10 AM, Kostya Serebryany <kcc at google.com> wrote: > One more proposal: simple per-thread counters allocated with > mmap(MAP_NORESERVE), the same trick that works so well for asan/tsan/msan. > > Chrome has ~3M basic blocks instrumented for coverage, > so even largest applications will hardly have more than, say, 10M basic > blocks > I think this is a *gross* underestimation. I work with applications more than one...

...SIG_DFL}, NULL, 8) = 0 rt_sigaction(SIGRT_2, {SIG_DFL}, NULL, 8) = 0 execve("/usr/local/bin/wine-preloader", ["/usr/local/bin/wine-preloader", "/usr/local/bin/wine-kthread"], [/* 48 vars */]) = 0 old_mmap(NULL, 1114112, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0 old_mmap(0x80000000, 16777216, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = -1 E??? (errno -2147483648) old_mmap(0x110000, 267321344, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x110000 open("?L$@?t$|?L$t$`?4$?", O_RDON...

...8047448) = 0 resolvepath("/lib/libxnet.so.1", "/lib/libxnet.so.1", 1023) = 17 open("/lib/libxnet.so.1", O_RDONLY) = 3 mmap(0x00010000, 4096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_ALIGN, 3, 0) = 0xC6FC0000 mmap(0x00001000, 8192, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON|MAP_ALIGN, -1, 0) = 0xC6FB0000 mmap(0xC6FB0000, 5292, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_TEXT, 3, 0) = 0xC6FB0000 mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0) = 0xC6FA0000 close(3) = 0 x...

...on.so.1", "/usr/lib/securit y/pam_unix_session.so.1", 1023) = 39 19080: open("/usr/lib/security/pam_unix_session.so.1", O_RDONLY) = 9 19080: mmap(0x00000000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE, 9, 0) = 0xFF1E0 000 19080: mmap(0x00000000, 81920, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON, - 1, 0) = 0xFF0C0000 19080: mmap(0xFF0C0000, 3782, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 9, 0) = 0xFF0C0000 19080: mmap(0xFF0D2000, 1796, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_F IXED, 9, 8192) = 0xFF0D2000 19080: munmap(0xFF0C2000, 65536) = 0 190...

On Fri, Apr 18, 2014 at 11:44 AM, Dmitry Vyukov <dvyukov at google.com> wrote: > On Fri, Apr 18, 2014 at 11:32 AM, Dmitry Vyukov <dvyukov at google.com>wrote: > >> On Fri, Apr 18, 2014 at 11:13 AM, Dmitry Vyukov <dvyukov at google.com>wrote: >> >>> Hi, >>> >>> This is long thread, so I will combine several comments into single

...tes 100% > cpu load even if no sources and no clients are connected. > > If I trace the process using truss, I get the following: > > ... > open("/dev/zero", O_RDWR) = 1 > mmap(0x00000000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, > MAP_PRIVATE|MAP_NORESERV > E, 1, 0) = 0xEEBE0000 > close(1) = 0 > mprotect(0xEEBE0000, 8192, PROT_NONE) = 0 > lwp_create(0xEF40FAF0, 0x00C0, 0xEEBE3E04) = 6 > lwp_continue(6) = 0 > lwp_create(0x00000001, 0x4000, 0xEF40FC...

...JIT 200 times; stopping trying|| ||CBQN interpreter entered unexpected state, exiting. |This is because BQN tries to allocate memory for a JIT near itself and also in the lower 32 bits.| u64 near = (u64)&bqn_exec; u64 MAX_DIST = 1ULL<<30; mmap(NULL, sz, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_NORESERVE|MAP_PRIVATE|MAP_ANONYMOUS|MAP_32BIT, -1, 0); |However, |&bqn_exec| seems to be 0x7...||i.e. libcbqn.so is being loaded to a high address. Why is this? Is there some way to request that it and its symbols be loaded to lower addresses? I have never had this happen when using dlopen and dlsym...

Hi there, I'm trying to use the memory sanitizer of LLVM 3.3. It's crashing during MSan initialization (__msan::InitShadow). Here's the strace output. mmap(0x400000000000, 35184372088831, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x400000000000 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x55edf4b36720} --- +++ killed by SIGSEGV (core dumped) +++ Because of the -fsanitize=memory option, clang maps all segments in the 0x5555555????? range which is zero'ed out by this mmap. According to the Mem...

...ts are connected. >>> >>> If I trace the process using truss, I get the following: >>> >>> ... >>> open("/dev/zero", O_RDWR) = 1 >>> mmap(0x00000000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, >>> MAP_PRIVATE|MAP_NORESERV >>> E, 1, 0) = 0xEEBE0000 >>> close(1) = 0 >>> mprotect(0xEEBE0000, 8192, PROT_NONE) = 0 >>> lwp_create(0xEF40FAF0, 0x00C0, 0xEEBE3E04) = 6 >>> lwp_continue(6) = 0 >...

I have Solaris 10 U7 that is exporting ZFS filesytem. The client is Solaris 9 U7. I can mount the filesytem just fine but I am unable to write to it. showmount -e shows my mount is set for everyone. the dfstab file has option rw set. So what gives? Phillip -- This message posted from opensolaris.org

OK, so this may be a little off-topic, but here goes: The reason I switched to OpenSolaris was primarily to take advantage of ZFS''s features when storing my digital imaging collection. I switched from a pretty stock Linux setup, but it left me at one disadvantage. I had been using inotify under Linux to trigger a series of Ruby scripts that would do all the basic ingestion/setup for

...E|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory) > brk(0x31078000) = 0x46000 > mmap2(NULL, 822349824, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory) > mmap2(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0xa221a000 > munmap(0xa221a000, 942080) = 0 > munmap(0xa2400000, 106496) = 0 > mprotect(0xa2300000, 135168, PROT_READ|PROT_WRITE) = 0 > mmap2(NULL, 822218752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory...

Hello all, First off, i''m talking about a SXDE build 89. Sorry if that was discussed here before, but i did not find anything related on the archives, and i think is a "weird" issue... If i try to remove a specific file, i got: # rm file1 rm: file1: No such file or directory # rm -rf dir2 rm: Unable to remove directory dir2: Directory not empty Take a look: ------- cut

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"> <title></title> </head> <body text="#330000" bgcolor="#ffffff"> <tt><font size="+1">I am attempting to run the sun webserver 7

...lem is that the icecast process generates 100% cpu load even if no sources and no clients are connected. If I trace the process using truss, I get the following: ... open("/dev/zero", O_RDWR) = 1 mmap(0x00000000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_NORESERV E, 1, 0) = 0xEEBE0000 close(1) = 0 mprotect(0xEEBE0000, 8192, PROT_NONE) = 0 lwp_create(0xEF40FAF0, 0x00C0, 0xEEBE3E04) = 6 lwp_continue(6) = 0 lwp_create(0x00000001, 0x4000, 0xEF40FC8C) = 0 lwp_schedctl(SC_S...

...sources and no clients are connected. > > > > If I trace the process using truss, I get the following: > > > > ... > > open("/dev/zero", O_RDWR) = 1 > > mmap(0x00000000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, > > MAP_PRIVATE|MAP_NORESERV > > E, 1, 0) = 0xEEBE0000 > > close(1) = 0 > > mprotect(0xEEBE0000, 8192, PROT_NONE) = 0 > > lwp_create(0xEF40FAF0, 0x00C0, 0xEEBE3E04) = 6 > > lwp_continue(6) = 0 > > lwp_creat...

One thing I''ve been confused about for a long time is the relationship between ZFS, the ARC, and the page cache. We have an application that''s a quasi-database. It reads files by mmap()ing them. (writes are done via write()). We''re talking 100TB of data in files that are 100k->50G in size (the files have headers to tell the app what segment to map, so mapped chunks

...sr/local/ssl/lib/nss_winbind.so.1", 0xFFBEED14) = 0 open("/usr/local/ssl/lib/nss_winbind.so.1", O_RDONLY) = 3 fstat(3, 0xFFBEED14) = 0 mmap(0x00000000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xFF270000 mmap(0x00000000, 90112, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON, -1, 0) = 0xFF160000 mmap(0xFF160000, 10841, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF160000 mmap(0xFF172000, 3601, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 8192) = 0xFF172000 mmap(0xFF174000, 4592, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_...