History log of /freebsd/sys/vm/vnode_pager.c (Results 51 – 75 of 783)
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# 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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# c5c3ba6b 03-Sep-2019 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r351317 through r351731.


# 6470c8d3 29-Aug-2019 Konstantin Belousov <kib@FreeBSD.org>

Rework v_object lifecycle for vnodes.

Current implementation of vnode_create_vobject() and
vnode_destroy_vobject() is written so that it prepared to handle the
vm object destruction for live vnode.

Rework v_object lifecycle for vnodes.

Current implementation of vnode_create_vobject() and
vnode_destroy_vobject() is written so that it prepared to handle the
vm object destruction for live vnode. Practically, no filesystems use
this, except for some remnants that were present in UFS till today.
One of the consequences of that model is that each filesystem must
call vnode_destroy_vobject() in VOP_RECLAIM() or earlier, as result
all of them get rid of the v_object in reclaim.

Move the call to vnode_destroy_vobject() to vgonel() before
VOP_RECLAIM(). This makes v_object stable: either the object is NULL,
or it is valid vm object till the vnode reclamation. Remove code from
vnode_create_vobject() to handle races with the parallel destruction.

Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D21412

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# 783a68aa 25-Aug-2019 Konstantin Belousov <kib@FreeBSD.org>

Move OBJT_VNODE specific code from vm_object_terminate() to
vnode_destroy_vobject().

Reviewed by: alc, jeff (previous version), markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1

Move OBJT_VNODE specific code from vm_object_terminate() to
vnode_destroy_vobject().

Reviewed by: alc, jeff (previous version), markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D21357

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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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# a63915c2 28-Jul-2019 Alan Somers <asomers@FreeBSD.org>

MFHead @r350386

Sponsored by: The FreeBSD Foundation


# 6cb46f39 17-Jul-2019 Alan Somers <asomers@FreeBSD.org>

Revert r346608

That change was intended to be cosmetic, but it inadvertenly caused
vnode_pager_setsize to discard cached indirect blocks and extended
attributes on UFS during truncation. The reason

Revert r346608

That change was intended to be cosmetic, but it inadvertenly caused
vnode_pager_setsize to discard cached indirect blocks and extended
attributes on UFS during truncation. The reason is because those blocks
have negative LBNs, which get sign-cast to positive VM indexes.

Reported by: kib
Sponsored by: The FreeBSD Foundation

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# 0cab71bc 06-Jul-2019 Doug Moore <dougm@FreeBSD.org>

Fix style(9) violations involving division by PAGE_SIZE.

Reviewed by: alc
Approved by: markj (mentor)
Differential Revision: https://reviews.freebsd.org/D20847


Revision tags: release/11.3.0
# 0269ae4c 06-Jun-2019 Alan Somers <asomers@FreeBSD.org>

MFHead @348740

Sponsored by: The FreeBSD Foundation


# daec9284 21-May-2019 Conrad Meyer <cem@FreeBSD.org>

Include ktr.h in more compilation units

Similar to r348026, exhaustive search for uses of CTRn() and cross reference
ktr.h includes. Where it was obvious that an OS compat header of some kind
inclu

Include ktr.h in more compilation units

Similar to r348026, exhaustive search for uses of CTRn() and cross reference
ktr.h includes. Where it was obvious that an OS compat header of some kind
included ktr.h indirectly, .c files were left alone. Some of these files
clearly got ktr.h via header pollution in some scenarios, or tinderbox would
not be passing prior to this revision, but go ahead and explicitly include it
in files using it anyway.

Like r348026, these CUs did not show up in tinderbox as missing the include.

Reported by: peterj (arm64/mp_machdep.c)
X-MFC-With: r347984
Sponsored by: Dell EMC Isilon

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# 7648bc9f 13-May-2019 Alan Somers <asomers@FreeBSD.org>

MFHead @347527

Sponsored by: The FreeBSD Foundation


# 78022527 05-May-2019 Konstantin Belousov <kib@FreeBSD.org>

Switch to use shared vnode locks for text files during image activation.

kern_execve() locks text vnode exclusive to be able to set and clear
VV_TEXT flag. VV_TEXT is mutually exclusive with the v_w

Switch to use shared vnode locks for text files during image activation.

kern_execve() locks text vnode exclusive to be able to set and clear
VV_TEXT flag. VV_TEXT is mutually exclusive with the v_writecount > 0
condition.

The change removes VV_TEXT, replacing it with the condition
v_writecount <= -1, and puts v_writecount under the vnode interlock.
Each text reference decrements v_writecount. To clear the text
reference when the segment is unmapped, it is recorded in the
vm_map_entry backed by the text file as MAP_ENTRY_VN_TEXT flag, and
v_writecount is incremented on the map entry removal

The operations like VOP_ADD_WRITECOUNT() and VOP_SET_TEXT() check that
v_writecount does not contradict the desired change. vn_writecheck()
is now racy and its use was eliminated everywhere except access.
Atomic check for writeability and increment of v_writecount is
performed by the VOP. vn_truncate() now increments v_writecount
around VOP_SETATTR() call, lack of which is arguably a bug on its own.

nullfs bypasses v_writecount to the lower vnode always, so nullfs
vnode has its own v_writecount correct, and lower vnode gets all
references, since object->handle is always lower vnode.

On the text vnode' vm object dealloc, the v_writecount value is reset
to zero, and deadfs vop_unset_text short-circuit the operation.
Reclamation of lowervp always reclaims all nullfs vnodes referencing
lowervp first, so no stray references are left.

Reviewed by: markj, trasz
Tested by: mjg, pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 month
Differential revision: https://reviews.freebsd.org/D19923

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# 3746a90a 24-Apr-2019 Alan Somers <asomers@FreeBSD.org>

Slightly simplify vnode_pager_setsize

No functional change intended.

Sponsored by: The FreeBSD Foundation


# 2aaf9152 18-Mar-2019 Alan Somers <asomers@FreeBSD.org>

MFHead@r345275


# b18a4cca 05-Mar-2019 Enji Cooper <ngie@FreeBSD.org>

MFhead@r344786


# 844fc3e9 04-Mar-2019 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r344549 through r344775.


# 40a51684 26-Feb-2019 Jason A. Harmening <jah@FreeBSD.org>

Fix incorrect assertion in vnode_pager_generic_getpages()

Reviewed by: kib, glebius
MFC after: 1 week


# a8fe8db4 25-Feb-2019 Dimitry Andric <dim@FreeBSD.org>

Merge ^/head r344178 through r344512.


# 30e009fc 19-Feb-2019 Enji Cooper <ngie@FreeBSD.org>

MFhead@r344270


# 66fb0b1a 16-Feb-2019 Gleb Smirnoff <glebius@FreeBSD.org>

For 32-bit machines rollback the default number of vnode pager pbufs
back to the lever before r343030. For 64-bit machines reduce it slightly,
too. Together with r343030 I bumped the limit up to t

For 32-bit machines rollback the default number of vnode pager pbufs
back to the lever before r343030. For 64-bit machines reduce it slightly,
too. Together with r343030 I bumped the limit up to the value we use at
Netflix to serve 100 Gbit/s of sendfile traffic, and it probably isn't a
good default.

Provide a loader tunable to change vnode pager pbufs count. Document it.

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# 756a5412 15-Jan-2019 Gleb Smirnoff <glebius@FreeBSD.org>

Allocate pager bufs from UMA instead of 80-ish mutex protected linked list.

o In vm_pager_bufferinit() create pbuf_zone and start accounting on how many
pbufs are we going to have set.
In variou

Allocate pager bufs from UMA instead of 80-ish mutex protected linked list.

o In vm_pager_bufferinit() create pbuf_zone and start accounting on how many
pbufs are we going to have set.
In various subsystems that are going to utilize pbufs create private zones
via call to pbuf_zsecond_create(). The latter calls uma_zsecond_create(),
and sets a limit on created zone. After startup preallocate pbufs according
to requirements of all pbuf zones.

Subsystems that used to have a private limit with old allocator now have
private pbuf zones: md(4), fusefs, NFS client, smbfs, VFS cluster, FFS,
swap, vnode pager.

The following subsystems use shared pbuf zone: cam(4), nvme(4), physio(9),
aio(4). They should have their private limits, but changing that is out of
scope of this commit.

o Fetch tunable value of kern.nswbuf from init_param2() and while here move
NSWBUF_MIN to opt_param.h and eliminate opt_swap.h, that was holding only
this option.
Default values aren't touched by this commit, but they probably should be
reviewed wrt to modern hardware.

This change removes a tight bottleneck from sendfile(2) operation, that
uses pbufs in vnode pager. Other pagers also would benefit from faster
allocation.

Together with: gallatin
Tested by: pho

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Revision tags: release/12.0.0, release/11.2.0
# e5818a53 29-Mar-2018 Jeff Roberson <jeff@FreeBSD.org>

Implement several enhancements to NUMA policies.

Add a new "interleave" allocation policy which stripes pages across
domains with a stride or width keeping contiguity within a multi-page
region.

Mo

Implement several enhancements to NUMA policies.

Add a new "interleave" allocation policy which stripes pages across
domains with a stride or width keeping contiguity within a multi-page
region.

Move the kernel to the dedicated numbered cpuset #2 making it possible
to assign kernel threads and memory policy separately from user. This
also eliminates the need for the complicated interrupt binding code.

Add a sysctl API for viewing and manipulating domainsets. Refactor some
of the cpuset_t manipulation code using the generic bitset type so that
it can be used for both. This probably belongs in a dedicated subr file.

Attempt to improve the include situation.

Reviewed by: kib
Discussed with: jhb (cpuset parts)
Tested by: pho (before review feedback)
Sponsored by: Netflix, Dell/EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14839

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# e2068d0b 06-Feb-2018 Jeff Roberson <jeff@FreeBSD.org>

Use per-domain locks for vm page queue free. Move paging control from
global to per-domain state. Protect reservations with the free lock
from the domain that they belong to. Refactor to make vm d

Use per-domain locks for vm page queue free. Move paging control from
global to per-domain state. Protect reservations with the free lock
from the domain that they belong to. Refactor to make vm domains more
of a first class object.

Reviewed by: markj, kib, gallatin
Tested by: pho
Sponsored by: Netflix, Dell/EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14000

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# 938cdc42 02-Feb-2018 Konstantin Belousov <kib@FreeBSD.org>

On pageout, in vnode generic pager, for partially dirty page, only
clear dirty bits for completely invalid blocks.

Otherwise we might not write out the last chunk that is shorter than
512 bytes, if

On pageout, in vnode generic pager, for partially dirty page, only
clear dirty bits for completely invalid blocks.

Otherwise we might not write out the last chunk that is shorter than
512 bytes, if the file end is not aligned on disk block boundary.
This become important after the r324794.

PR: 225586
Reported by: tris_vern@hotmail.com
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 3 days

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# 937d37fc 19-Nov-2017 Hans Petter Selasky <hselasky@FreeBSD.org>

Merge ^/head r325842 through r325998.


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