From 100d1b33f088fd38f69129afff7f9c2a1e084a57 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 24 May 2024 06:52:24 +0200 Subject: Merging upstream version 6.8. Signed-off-by: Daniel Baumann --- man2/migrate_pages.2 | 174 --------------------------------------------------- 1 file changed, 174 deletions(-) delete mode 100644 man2/migrate_pages.2 (limited to 'man2/migrate_pages.2') diff --git a/man2/migrate_pages.2 b/man2/migrate_pages.2 deleted file mode 100644 index 8f2ee8e..0000000 --- a/man2/migrate_pages.2 +++ /dev/null @@ -1,174 +0,0 @@ -.\" SPDX-License-Identifier: Linux-man-pages-copyleft-2-para -.\" -.\" Copyright 2009 Intel Corporation -.\" Author: Andi Kleen -.\" Based on the move_pages manpage which was -.\" This manpage is Copyright (C) 2006 Silicon Graphics, Inc. -.\" Christoph Lameter -.\" -.TH migrate_pages 2 2023-10-31 "Linux man-pages 6.7" -.SH NAME -migrate_pages \- move all pages in a process to another set of nodes -.SH LIBRARY -NUMA (Non-Uniform Memory Access) policy library -.RI ( libnuma ", " \-lnuma ) -.SH SYNOPSIS -.nf -.B #include -.P -.BI "long migrate_pages(int " pid ", unsigned long " maxnode, -.BI " const unsigned long *" old_nodes, -.BI " const unsigned long *" new_nodes ); -.fi -.SH DESCRIPTION -.BR migrate_pages () -attempts to move all pages of the process -.I pid -that are in memory nodes -.I old_nodes -to the memory nodes in -.IR new_nodes . -Pages not located in any node in -.I old_nodes -will not be migrated. -As far as possible, -the kernel maintains the relative topology relationship inside -.I old_nodes -during the migration to -.IR new_nodes . -.P -The -.I old_nodes -and -.I new_nodes -arguments are pointers to bit masks of node numbers, with up to -.I maxnode -bits in each mask. -These masks are maintained as arrays of unsigned -.I long -integers (in the last -.I long -integer, the bits beyond those specified by -.I maxnode -are ignored). -The -.I maxnode -argument is the maximum node number in the bit mask plus one (this is the same -as in -.BR mbind (2), -but different from -.BR select (2)). -.P -The -.I pid -argument is the ID of the process whose pages are to be moved. -To move pages in another process, -the caller must be privileged -.RB ( CAP_SYS_NICE ) -or the real or effective user ID of the calling process must match the -real or saved-set user ID of the target process. -If -.I pid -is 0, then -.BR migrate_pages () -moves pages of the calling process. -.P -Pages shared with another process will be moved only if the initiating -process has the -.B CAP_SYS_NICE -privilege. -.SH RETURN VALUE -On success -.BR migrate_pages () -returns the number of pages that could not be moved -(i.e., a return of zero means that all pages were successfully moved). -On error, it returns \-1, and sets -.I errno -to indicate the error. -.SH ERRORS -.TP -.B EFAULT -Part or all of the memory range specified by -.IR old_nodes / new_nodes -and -.I maxnode -points outside your accessible address space. -.TP -.B EINVAL -The value specified by -.I maxnode -exceeds a kernel-imposed limit. -.\" As at 3.5, this limit is "a page worth of bits", e.g., -.\" 8 * 4096 bits, assuming a 4kB page size. -Or, -.I old_nodes -or -.I new_nodes -specifies one or more node IDs that are -greater than the maximum supported node ID. -Or, none of the node IDs specified by -.I new_nodes -are on-line and allowed by the process's current cpuset context, -or none of the specified nodes contain memory. -.TP -.B EPERM -Insufficient privilege -.RB ( CAP_SYS_NICE ) -to move pages of the process specified by -.IR pid , -or insufficient privilege -.RB ( CAP_SYS_NICE ) -to access the specified target nodes. -.TP -.B ESRCH -No process matching -.I pid -could be found. -.\" FIXME Document the other errors that can occur for migrate_pages() -.SH STANDARDS -Linux. -.SH HISTORY -Linux 2.6.16. -.SH NOTES -For information on library support, see -.BR numa (7). -.P -Use -.BR get_mempolicy (2) -with the -.B MPOL_F_MEMS_ALLOWED -flag to obtain the set of nodes that are allowed by -the calling process's cpuset. -Note that this information is subject to change at any -time by manual or automatic reconfiguration of the cpuset. -.P -Use of -.BR migrate_pages () -may result in pages whose location -(node) violates the memory policy established for the -specified addresses (see -.BR mbind (2)) -and/or the specified process (see -.BR set_mempolicy (2)). -That is, memory policy does not constrain the destination -nodes used by -.BR migrate_pages (). -.P -The -.I -header is not included with glibc, but requires installing -.I libnuma\-devel -or a similar package. -.SH SEE ALSO -.BR get_mempolicy (2), -.BR mbind (2), -.BR set_mempolicy (2), -.BR numa (3), -.BR numa_maps (5), -.BR cpuset (7), -.BR numa (7), -.BR migratepages (8), -.BR numastat (8) -.P -.I Documentation/vm/page_migration.rst -in the Linux kernel source tree -- cgit v1.2.3