search for: mincore

...fragmented disk space and metadata read is a sync operation, which impacts the efficiency of readahead much. The patches try to add meatadata readahead for btrfs. In btrfs, metadata is stored in btree_inode. Ideally, if we could hook the inode to a fd so we could use existing syscalls (readahead, mincore or upcoming fincore) to do readahead, but the inode is hidden, there is no easy way for this from my understanding. So we add two ioctls for this. One is like readahead syscall, the other is like micore/fincore syscall. Under a harddisk based netbook with Meego, the metadata readahead reduced abo...

...uires that rsync do some accounting, calling fdatasync() and fadvise() only after giving the kernel an opportunity to flush the data itself. Moreover, fadvise(DONTNEED) frees pages regardless of whether the hinting process is the only referrer. For this reason, the previous fadvise patch also used mincore to identify which pages are needed by other processes. Altogether, this makes using fadvise very expensive from a complexity standpoint. This is very unfortunately since the interface could be quite usable with a few minor changes. I recently asked about this on the LKML[2], where Minchan Kim was...

Dear R users, I am using package mice and I am getting the error " Error in if (meth[j] != "") { : argument is of length zero." I have tried using several different versions of R (even the one that will be coming out this month) to no avail. I am using RStudio as my interface with R. Also note that I had run this a couple of days ago and it was working fine; I can't,

...cussed in the paper - could be modify the applications to lock the security relevant pages in memory. Again this becomes impractical with pmem as host does not have visibility into that. However note that as long as the only countermeasure linux uses is "Privileged Access" (i.e. blocking mincore) nothing can be done as guest page cache remains as vulnerable as host page cache. Countermeasures: which host-side countermeasures can be designed would depend on which countermeasures are used guest-side - we would need to make sure they are not broken by pmem. For "Preventing Efficient E...

https://bugzilla.samba.org/show_bug.cgi?id=7876 Summary: please implement o_direct Product: rsync Version: 3.1.0 Platform: Other OS/Version: Linux Status: NEW Severity: normal Priority: P3 Component: core AssignedTo: wayned at samba.org ReportedBy: costinel at gmail.com QAContact:

Hi List, I have updated my rsync fadvise patch which stops rsync from ousting all your other data from cache when running large jobs. I have also written an article about the whole issue. http://insights.oetiker.ch/linux/fadvise.html cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten http://it.oetiker.ch tobi@oetiker.ch ++41 62 213 9902

Hello everyone!I have a data set with missing observations that I am trying to impute. I am using MICE and I would like the imputed values to all be positive. I have two types of variables: prices (P1 to P136) and quantities (Q1 to Q136) and I also want the range of these two types to be different. Besides these variables. I am using the squeeze function but I am unable to set it such that I

...- could be modify the applications to lock the security > relevant pages in memory. Again this becomes impractical with pmem as > host does not have visibility into that. However note that as long > as the only countermeasure linux uses is "Privileged Access" > (i.e. blocking mincore) nothing can be done as guest page cache > remains as vulnerable as host page cache. This sounds very use-case specific. If I run a VM only with a very specific workload (say, a container running one application), I usually don't care about leaks within the VM. At least not leaks between ap...

...ses my entire 50GB home directory. I was surprised to find that rsync does not use fadvise to notify the kernel of its use-once data usage pattern. It looks like a patch[1] was written (although never merged, it seems) incorporating fadvise support, but I found its implementation rather odd, using mincore() and FADV_DONTNEED to kick out only regions brought in by rsync. It seemed to me the simpler and more appropriate solution would be to simply flag every touched file with FADV_NOREUSE and let the kernel manage automatically expelling used pages. After looking deeper into the kernel implementation...

...- could be modify the applications to lock the security > relevant pages in memory. Again this becomes impractical with pmem as > host does not have visibility into that. However note that as long > as the only countermeasure linux uses is "Privileged Access" > (i.e. blocking mincore) nothing can be done as guest page cache > remains as vulnerable as host page cache. > > > Countermeasures: which host-side countermeasures can be designed would > depend on which countermeasures are used guest-side - we would need to > make sure they are not broken by pmem. Fo...

...a | PG_RW | PG_V | pgeflag; size -= PAGE_SIZE; tmpva += PAGE_SIZE; @@ -3009,7 +3280,9 @@ } void -pmap_unmapdev(vm_offset_t va, vm_size_t size) +pmap_unmapdev(va, size) + vm_offset_t va; + vm_size_t size; { vm_offset_t base, offset; @@ -3023,9 +3296,12 @@ * perform the pmap work for mincore */ int -pmap_mincore(pmap_t pmap, vm_offset_t addr) +pmap_mincore(pmap, addr) + pmap_t pmap; + vm_offset_t addr; { - pt_entry_t *ptep, pte; + + unsigned *ptep, pte; vm_page_t m; int val = 0; @@ -3035,7 +3311,7 @@ } if ((pte = *ptep) != 0) { - vm_paddr_t pa; + vm_offset_t pa;...

...VE_LIBEXPAT=1 -D USE_EXTERNAL_DXTN_LIB=1 -D _GNU_SOURCE -D USE_SSE41 -D DEBUG -D USE_X86_64_ASM -D HAVE_XLOCALE_H -D HAVE_STRTOF -D HAVE_DLOPEN -D HAVE_POSIX_MEMALIGN -D HAVE_LIBDRM -D GLX_USE_DRM -D HAVE_LIBUDEV -D GLX_INDIRECT_RENDERING -D GLX_DIRECT_RENDERING -D GLX_USE_TLS -D HAVE_ALIAS -D HAVE_MINCORE -D HAVE_LLVM=0x0306 -D LLVM_VERSION_PATCH=0 -D MAPI_MODE_GLAPI -D "MAPI_ABI_HEADER=\"shared-glapi/glapi_mapi_tmp.h\"" -I . -I ../../include -I ../../src/mapi -I ../../src/mapi -I /opt/xorg/include -internal-isystem /usr/local/include -internal-isystem /opt/llvm-toolchain-3.6.0rc...

...UND: perf_event_open SYSCALL FOUND: io_destroy SYSCALL FOUND: prctl SYSCALL FOUND: rt_sigpending SYSCALL FOUND: rtas SYSCALL FOUND: fcntl64 SYSCALL FOUND: mq_notify SYSCALL FOUND: pwritev SYSCALL FOUND: quotactl SYSCALL FOUND: epoll_ctl SYSCALL FOUND: tuxcall SYSCALL FOUND: setresuid SYSCALL FOUND: mincore SYSCALL FOUND: rt_sigreturn SYSCALL FOUND: restart_syscall SYSCALL FOUND: process_vm_readv SYSCALL FOUND: vhangup SYSCALL FOUND: oldstat SYSCALL FOUND: query_module SYSCALL FOUND: pread64 SYSCALL FOUND: renameat SYSCALL FOUND: clock_getres SYSCALL FOUND: exit_group SYSCALL FOUND: lsetxattr SYSCALL...

On Tue, Aug 20, 2013 at 07:44:39AM +0200, leroy christophe wrote: > > > Find attached two patches I have in order to build klibc 2.0.2 > against kernel 3.8.13 > We had to introduce those patches when going from kernel 3.6 to kernel 3.7 > Hope it helps. > those patches are wrong and again very brittle. just use the way it is described in `make help': A) cd ~/src/linux