Based on move_pages. Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx> Index: man-pages-3.24/man2/migrate_pages.2 =================================================================== --- /dev/null +++ man-pages-3.24/man2/migrate_pages.2 @@ -0,0 +1,130 @@ +.\" Hey Emacs! This file is -*- nroff -*- source. +.\" +.\" Copyright 2009 Intel Coporation +.\" Author: Andi Kleen +.\" Based on the move_pages manpage which was +.\" This manpage is Copyright (C) 2006 Silicon Graphics, Inc. +.\" Christoph Lameter +.\" +.\" Permission is granted to make and distribute verbatim copies of this +.\" manual provided the copyright notice and this permission notice are +.\" preserved on all copies. +.\" +.\" Permission is granted to copy and distribute modified versions of this +.\" manual under the conditions for verbatim copying, provided that the +.\" entire resulting derived work is distributed under the terms of a +.\" permission notice identical to this one. +.TH MIGRATE_PAGES 2 2009-11-01 "Linux" "Linux Programmer's Manual" +.SH NAME +migrate_pages \- move all pages in a process to another set of nodes +.SH SYNOPSIS +.nf +.B #include <numaif.h> +.sp +.BI "long migrate_pages(int " pid ", unsigned long " maxnode", +.BI " const unsigned long * " old_nodes, +.BI " const unsigned long * " new_nodes); +.fi +.sp +Link with \fI\-lnuma\fP. +.SH DESCRIPTION +.BR migrate_pages () +moves all pages of the process +.I pid +that are in memory nodes +.I old_nodes +to +.I new_nodes. +Pages not placed in any node in +.I old_nodes +will not be migrated. +The kernel keeps the relative topology relationship inside +.I old_nodes +in +.I new_nodes +as far as possible. + +.I old_nodes +and +.I new_nodes +are pointers to bitmasks of node numbers, rounded to unsigned longs, with upto +.I maxnode +bits. +.I maxnode +is the maximum node number in the bitmask plus one (this is the same +as in +.I mbind (2), +but different from +.I select (2)) + +.I pid +is the ID of the process in which 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. + +Pages shared with another process will only be moved if the initiating +process has the +.RB CAP_SYS_NICE +privilege. +.SH "RETURN VALUE" +On success +.BR migrate_pages () +returns zero. +On error, it returns \-1, and sets +.I errno +to indicate the error. +.\" .SH ERRORS +.\" FIXME write me +.SH VERSIONS +.BR migrate_pages () +first appeared on Linux in version 2.6.16. +.SH CONFORMING TO +This system call is Linux-specific. +.SH "NOTES" +For information on library support, see +.BR numa (7). + +Use +.BR get_mempolicy (2) +with the +.B MPOL_F_MEMS_ALLOWED +flag to obtain the set of nodes that are allowed by +.\" FIXME Clarify "current cpuset". Is that the cpuset of the caller +.\" or the target? +the current cpuset. +Note that this information is subject to change at any +time by manual or automatic reconfiguration of the cpuset. + +Use of this function 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 (). + +The +.I numaif.h +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 numa_stat (8) -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
