History log of /freebsd/sys/vm/vm_pager.h (Results 26 – 50 of 197)
Revision (<<< Hide revision tags) (Show revision tags >>>) Date Author Comments
Revision tags: release/12.1.0
# f993ed2f 09-Sep-2019 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r351732 through r352104.


# fe7bcbaf 03-Sep-2019 Kyle Evans <kevans@FreeBSD.org>

vm pager: writemapping accounting for OBJT_SWAP

Currently writemapping accounting is only done for vnode_pager which does
some accounting on the underlying vnode.

Extend this to allow accounting to

vm pager: writemapping accounting for OBJT_SWAP

Currently writemapping accounting is only done for vnode_pager which does
some accounting on the underlying vnode.

Extend this to allow accounting to be possible for any of the pager types.
New pageops are added to update/release writecount that need to be
implemented for any pager wishing to do said accounting, and we implement
these methods now for both vnode_pager (unchanged) and swap_pager.

The primary motivation for this is to allow other systems with OBJT_SWAP
objects to check if their objects have any write mappings and reject
operations with EBUSY if so. posixshm will be the first to do so in order to
reject adding write seals to the shmfd if any writable mappings exist.

Reviewed by: kib, markj
Differential Revision: https://reviews.freebsd.org/D21456

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# 4153054a 20-Aug-2019 Jeff Roberson <jeff@FreeBSD.org>

Permit vm_pager_has_page() to run with a shared lock. Introduce
VM_OBJECT_DROP/VM_OBJECT_PICKUP to handle functions that are called with
uncertain lock state.

Reviewed by: kib, markj
Tested by: pho

Permit vm_pager_has_page() to run with a shared lock. Introduce
VM_OBJECT_DROP/VM_OBJECT_PICKUP to handle functions that are called with
uncertain lock state.

Reviewed by: kib, markj
Tested by: pho
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D21310

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Revision tags: release/11.3.0, release/12.0.0, release/11.2.0
# 82725ba9 23-Nov-2017 Hans Petter Selasky <hselasky@FreeBSD.org>

Merge ^/head r325999 through r326131.


# 51369649 20-Nov-2017 Pedro F. Giffuni <pfg@FreeBSD.org>

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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Revision tags: release/10.4.0, release/11.1.0
# 348238db 01-Mar-2017 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r314420 through r314481.


# fbbd9655 01-Mar-2017 Warner Losh <imp@FreeBSD.org>

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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# 1bde3b70 09-Dec-2016 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r309519 through r309757.


# c42b43a0 08-Dec-2016 Konstantin Belousov <kib@FreeBSD.org>

Add a new populate() pager method and extend device pager ops vector
with cdev_pg_populate() to provide device drivers access to it. It
gives drivers fine control of the pages ownership and allows d

Add a new populate() pager method and extend device pager ops vector
with cdev_pg_populate() to provide device drivers access to it. It
gives drivers fine control of the pages ownership and allows drivers
to implement arbitrary prefault policies.

The populate method is called on a page fault and is supposed to
populate the vm object with the page at the fault location and some
amount of pages around it, at pager's discretion. VM provides the
pager with the hints about current range of the object mapping, to
avoid instantiation of immediately unused pages, if pager decides so.
Also, VM passes the fault type and map entry protection to the pager,
allowing it to force the optimal required ownership of the mapped
pages.

Installed pages must contiguously fill the returned region, be fully
valid and exclusively busied. Of course, the pages must be compatible
with the object' type.

After populate() successfully returned, VM fault handler installs as
many instantiated pages into the process page tables as it sees
reasonable, while still obeying the correct semantic for COW and vm
map locking.

The method is opt-in, pager sets OBJ_POPULATE flag to indicate that
the method can be called. If pager' vm objects can be shadowed, pager
must implement the traditional getpages() method in addition to the
populate(). Populate() might fall back to the getpages() on per-call
basis as well, by returning VM_PAGER_BAD error code.

For now for device pagers, the populate() method is only allowed to be
used by the managed device pagers, but the limitation is only made
because there is no unmanaged fault handlers which could use it right
now.

KPI designed together with, and reviewed by: alc
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks

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# 0ed76ec8 24-Nov-2016 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r308870 through r309105.


# 99e6e193 23-Nov-2016 Mark Johnston <markj@FreeBSD.org>

Release laundered vnode pages to the head of the inactive queue.

The swap pager enqueues laundered pages near the head of the inactive queue
to avoid another trip through LRU before reclamation. Thi

Release laundered vnode pages to the head of the inactive queue.

The swap pager enqueues laundered pages near the head of the inactive queue
to avoid another trip through LRU before reclamation. This change adds
support for this behaviour to the vnode pager and makes use of it in UFS and
ext2fs. Some ioflag handling is consolidated into a common subroutine so
that this support can be easily extended to other filesystems which make use
of the buffer cache. No changes are needed for ZFS since its putpages
routine always undirties the pages before returning, and the laundry
thread requeues the pages appropriately in this case.

Reviewed by: alc, kib
Differential Revision: https://reviews.freebsd.org/D8589

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# 02ebdc78 31-Oct-2016 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r307736 through r308146.


# 1dcadc02 30-Oct-2016 Konstantin Belousov <kib@FreeBSD.org>

Remove vm_pager_has_page() declaration. It is not too useful since
static inline definition appears later in the file.

Reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 1 week


Revision tags: release/11.0.1, release/11.0.0, release/10.3.0
# b626f5a7 04-Jan-2016 Glen Barber <gjb@FreeBSD.org>

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation


# 9a7cd2e6 22-Dec-2015 Bjoern A. Zeeb <bz@FreeBSD.org>

MFH @r292599

This includes the pluggable TCP framework and other chnages to the
netstack to track for VNET stability.

Security: The FreeBSD Foundation


# b0cd2017 16-Dec-2015 Gleb Smirnoff <glebius@FreeBSD.org>

A change to KPI of vm_pager_get_pages() and underlying VOP_GETPAGES().

o With new KPI consumers can request contiguous ranges of pages, and
unlike before, all pages will be kept busied on return,

A change to KPI of vm_pager_get_pages() and underlying VOP_GETPAGES().

o With new KPI consumers can request contiguous ranges of pages, and
unlike before, all pages will be kept busied on return, like it was
done before with the 'reqpage' only. Now the reqpage goes away. With
new interface it is easier to implement code protected from race
conditions.

Such arrayed requests for now should be preceeded by a call to
vm_pager_haspage() to make sure that request is possible. This
could be improved later, making vm_pager_haspage() obsolete.

Strenghtening the promises on the business of the array of pages
allows us to remove such hacks as swp_pager_free_nrpage() and
vm_pager_free_nonreq().

o New KPI accepts two integer pointers that may optionally point at
values for read ahead and read behind, that a pager may do, if it
can. These pages are completely owned by pager, and not controlled
by the caller.

This shifts the UFS-specific readahead logic from vm_fault.c, which
should be file system agnostic, into vnode_pager.c. It also removes
one VOP_BMAP() request per hard fault.

Discussed with: kib, alc, jeff, scottl
Sponsored by: Nginx, Inc.
Sponsored by: Netflix

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Revision tags: release/10.2.0
# 416ba5c7 22-Jun-2015 Navdeep Parhar <np@FreeBSD.org>

Catch up with HEAD (r280229-r284686).


# 76aeda8a 20-Jun-2015 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r284188 through r284643.


# 2fbd60ec 20-Jun-2015 Baptiste Daroussin <bapt@FreeBSD.org>

Merge from head @274131


# 093ebe1d 18-Jun-2015 Gleb Smirnoff <glebius@FreeBSD.org>

o Un-inline vm_pager_get_pages(), vm_pager_get_pages_async().
o Provide an extensive set of assertions for input array of pages.
o Remove now duplicate assertions from different pagers.

Sponsored by

o Un-inline vm_pager_get_pages(), vm_pager_get_pages_async().
o Provide an extensive set of assertions for input array of pages.
o Remove now duplicate assertions from different pagers.

Sponsored by: Nginx, Inc.
Sponsored by: Netflix

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# 98e0ffae 27-May-2015 Simon J. Gerraty <sjg@FreeBSD.org>

Merge sync of head


# 4bf53d0b 04-Apr-2015 Baptiste Daroussin <bapt@FreeBSD.org>

Merge from HEAD


# e6e746bf 25-Mar-2015 Glen Barber <gjb@FreeBSD.org>

MFH: r278968-r280640

Sponsored by: The FreeBSD Foundation


# c14aafed 18-Mar-2015 Navdeep Parhar <np@FreeBSD.org>

Merge r278538 through r280226.


# 4d6481a4 17-Mar-2015 Gleb Smirnoff <glebius@FreeBSD.org>

o Enhance vm_pager_free_nonreq() function:
- Allow to call the function with vm object lock held.
- Allow to specify reqpage that doesn't match any page in the region,
meaning freeing all pag

o Enhance vm_pager_free_nonreq() function:
- Allow to call the function with vm object lock held.
- Allow to specify reqpage that doesn't match any page in the region,
meaning freeing all pages.
o Utilize the new function in couple more places in vnode pager.

Reviewed by: alc, kib
Sponsored by: Netflix
Sponsored by: Nginx, Inc.

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