SET_PAGEBLOCK_FLAGS_(9) Memory Management in Linux SET_PAGEBLOCK_FLAGS_(9)NAME
set_pageblock_flags_group - Set the requested group of flags for a pageblock_nr_pages block of pages
SYNOPSIS
void set_pageblock_flags_group(struct page * page, unsigned long flags, int start_bitidx, int end_bitidx);
ARGUMENTS
page
The page within the block of interest
flags
The flags to set
start_bitidx
The first bit of interest
end_bitidx
The last bit of interest
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 SET_PAGEBLOCK_FLAGS_(9)
Check Out this Related Man Page
KCALLOC(9) Memory Management in Linux KCALLOC(9)NAME
kcalloc - allocate memory for an array. The memory is set to zero.
SYNOPSIS
void * kcalloc(size_t n, size_t size, gfp_t flags);
ARGUMENTS
n
number of elements.
size
element size.
flags
the type of memory to allocate.
DESCRIPTION
The flags argument may be one of:
GFP_USER - Allocate memory on behalf of user. May sleep.
GFP_KERNEL - Allocate normal kernel ram. May sleep.
GFP_ATOMIC - Allocation will not sleep. May use emergency pools. For example, use this inside interrupt handlers.
GFP_HIGHUSER - Allocate pages from high memory.
GFP_NOIO - Do not do any I/O at all while trying to get memory.
GFP_NOFS - Do not make any fs calls while trying to get memory.
GFP_NOWAIT - Allocation will not sleep.
GFP_THISNODE - Allocate node-local memory only.
GFP_DMA - Allocation suitable for DMA. Should only be used for kmalloc caches. Otherwise, use a slab created with SLAB_DMA.
Also it is possible to set different flags by OR'ing in one or more of the following additional flags:
__GFP_COLD - Request cache-cold pages instead of trying to return cache-warm pages.
__GFP_HIGH - This allocation has high priority and may use emergency pools.
__GFP_NOFAIL - Indicate that this allocation is in no way allowed to fail (think twice before using).
__GFP_NORETRY - If memory is not immediately available, then give up at once.
__GFP_NOWARN - If allocation fails, don't issue any warnings.
__GFP_REPEAT - If allocation fails initially, try once more before failing.
There are other flags available as well, but these are not intended for general use, and so are not documented here. For a full list of
potential flags, always refer to linux/gfp.h.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 KCALLOC(9)
Hi all,
I want to create a new user and grant him ONLY transfer files access to a specific directory where he can only upload and read the files. He should be restricted to this activity only.
Regards (6 Replies)
Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hi,
Last 2 weeks I have searched many forums and i haven't found the answer for the question:
How to get all command output to Putty title?
Needed it for other programs to know when some jobs on a server is done and is it done right or wrong. Plink stdout and stdin wasn't working, i used many... (1 Reply)
anyone have any idea how do to this with auth_attr?
I suspect if I grant him
solaris.device.:RO::Device Allocation::help=DevAllocHeader.html
that will work but I'm unsure. Just looking for a second opinion. (10 Replies)
I am looking for a stable, reliable system to replace my current Windows systems in the home. These are simple systems that I purchased from the local Big Box store.
I have heard many good things about Unix and it's various children and it sounds like a good option to me. I have worked... (2 Replies)
We have a lot of scripts using cut as :
cut -c 0-8 --works for cut (GNU coreutils) 5.97, but does not work for cut (GNU coreutils) 8.4.
Gives error -
cut: fields and positions are numbered from 1
Try `cut --help' for more information.
The position needs to start with 1 for later... (6 Replies)
I've got a problem with a proxy configuration. We have an LDAP group that lists all users who are authorised to use the proxy to FTP (usually Filezilla) out to the world, and by implication those not in the group should be denied. My users are delighted that this has been enabled and those that... (9 Replies)
hi folks,
how to using tar with exclude directory and compress it using tar.Z
i only know how to exclude dir only with this command below:
tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/
how to compress it using 1 command?
Thanx
Please use CODE tags as... (6 Replies)
Hello All,
I had recently learnt a bit of Docker(which provides containerization process).
Here are some of my learning points from it.
Let us start first with very basic question:
What is Docker:
Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hello for all,
I am testing the behavior of a 32 bit application running on Solaris 5.10 (SPARC), and realize it reaches 4GB of memory and then crashes.
It doesn't matter the amount of used memory as application is intended to perform many transactions; rather, what I want to achieve is to... (2 Replies)