History log of /freebsd/sys/vm/vnode_pager.c (Results 176 – 200 of 783)
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# d1d01586 05-Sep-2013 Simon J. Gerraty <sjg@FreeBSD.org>

Merge from head


# 46ed9e49 04-Sep-2013 Peter Grehan <grehan@FreeBSD.org>

IFC @ r255209


# c7aebda8 09-Aug-2013 Attilio Rao <attilio@FreeBSD.org>

The soft and hard busy mechanism rely on the vm object lock to work.
Unify the 2 concept into a real, minimal, sxlock where the shared
acquisition represent the soft busy and the exclusive acquisitio

The soft and hard busy mechanism rely on the vm object lock to work.
Unify the 2 concept into a real, minimal, sxlock where the shared
acquisition represent the soft busy and the exclusive acquisition
represent the hard busy.
The old VPO_WANTED mechanism becames the hard-path for this new lock
and it becomes per-page rather than per-object.
The vm_object lock becames an interlock for this functionality:
it can be held in both read or write mode.
However, if the vm_object lock is held in read mode while acquiring
or releasing the busy state, the thread owner cannot make any
assumption on the busy state unless it is also busying it.

Also:
- Add a new flag to directly shared busy pages while vm_page_alloc
and vm_page_grab are being executed. This will be very helpful
once these functions happen under a read object lock.
- Move the swapping sleep into its own per-object flag

The KPI is heavilly changed this is why the version is bumped.
It is very likely that some VM ports users will need to change
their own code.

Sponsored by: EMC / Isilon storage division
Discussed with: alc
Reviewed by: jeff, kib
Tested by: gavin, bapt (older version)
Tested by: pho, scottl

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# 40f65a4d 07-Aug-2013 Peter Grehan <grehan@FreeBSD.org>

IFC @ r254014


# 672ed870 02-Aug-2013 Peter Grehan <grehan@FreeBSD.org>

IFC @ r253862

- change the SI_SUB_RUN_SCHEDULER sysinits in hv_utilc and
hv_netvsc_drv_freebsd.c to SI_SUB_KTHREAD_IDLE, since the
former is no longer in FreeBSD.
The use of these SYSINITs can pro

IFC @ r253862

- change the SI_SUB_RUN_SCHEDULER sysinits in hv_utilc and
hv_netvsc_drv_freebsd.c to SI_SUB_KTHREAD_IDLE, since the
former is no longer in FreeBSD.
The use of these SYSINITs can probably be removed.

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# c93dcf22 24-Jul-2013 Jeff Roberson <jeff@FreeBSD.org>

- Correct a stale comment. We don't have vclean() anymore. The work is
done by vgonel() and destroy_vobject() should only be called once from
VOP_INACTIVE().

Sponsored by: EMC / Isilon Stora

- Correct a stale comment. We don't have vclean() anymore. The work is
done by vgonel() and destroy_vobject() should only be called once from
VOP_INACTIVE().

Sponsored by: EMC / Isilon Storage Division

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# 552311f4 17-Jul-2013 Xin LI <delphij@FreeBSD.org>

IFC @253398


# cfe30d02 19-Jun-2013 Gleb Smirnoff <glebius@FreeBSD.org>

Merge fresh head.


Revision tags: release/8.4.0
# 9b8851fa 28-Apr-2013 Konstantin Belousov <kib@FreeBSD.org>

Assert that the object type for the vnode' non-NULL v_object, passed
to vnode_pager_setsize(), is either OBJT_VNODE, or, if vnode was
already reclaimed, OBJT_DEAD. Note that the later is only possib

Assert that the object type for the vnode' non-NULL v_object, passed
to vnode_pager_setsize(), is either OBJT_VNODE, or, if vnode was
already reclaimed, OBJT_DEAD. Note that the later is only possible
due to some filesystems, in particular, nfsiods from nfs clients, call
vnode_pager_setsize() with unlocked vnode.

More, if the object is terminated, do not perform the resizing
operation.

Reviewed by: alc
Tested by: pho, bf
MFC after: 1 week

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# 6ded8427 28-Apr-2013 Konstantin Belousov <kib@FreeBSD.org>

Convert panic() into KASSERT().

Reviewed by: alc
MFC after: 1 week


# 69e6d7b7 12-Apr-2013 Simon J. Gerraty <sjg@FreeBSD.org>

sync from head


# 6991ee13 20-Mar-2013 Konstantin Belousov <kib@FreeBSD.org>

Fix the logic inversion in the r248512.

Noted by: mckay


# 6ce697dc 19-Mar-2013 Konstantin Belousov <kib@FreeBSD.org>

Pass unmapped buffers for page in requests if the filesystem indicated support
for the unmapped i/o.

Sponsored by: The FreeBSD Foundation
Tested by: pho


# 876a84e8 18-Mar-2013 Martin Matuska <mm@FreeBSD.org>

MFC @248461


# 70e198dd 14-Mar-2013 Konstantin Belousov <kib@FreeBSD.org>

Some style fixes.

Sponsored by: The FreeBSD Foundation


# a03fbc7e 09-Mar-2013 Martin Matuska <mm@FreeBSD.org>

MFC @248093


# 89f6b863 09-Mar-2013 Attilio Rao <attilio@FreeBSD.org>

Switch the vm_object mutex to be a rwlock. This will enable in the
future further optimizations where the vm_object lock will be held
in read mode most of the time the page cache resident pool of pa

Switch the vm_object mutex to be a rwlock. This will enable in the
future further optimizations where the vm_object lock will be held
in read mode most of the time the page cache resident pool of pages
are accessed for reading purposes.

The change is mostly mechanical but few notes are reported:
* The KPI changes as follow:
- VM_OBJECT_LOCK() -> VM_OBJECT_WLOCK()
- VM_OBJECT_TRYLOCK() -> VM_OBJECT_TRYWLOCK()
- VM_OBJECT_UNLOCK() -> VM_OBJECT_WUNLOCK()
- VM_OBJECT_LOCK_ASSERT(MA_OWNED) -> VM_OBJECT_ASSERT_WLOCKED()
(in order to avoid visibility of implementation details)
- The read-mode operations are added:
VM_OBJECT_RLOCK(), VM_OBJECT_TRYRLOCK(), VM_OBJECT_RUNLOCK(),
VM_OBJECT_ASSERT_RLOCKED(), VM_OBJECT_ASSERT_LOCKED()
* The vm/vm_pager.h namespace pollution avoidance (forcing requiring
sys/mutex.h in consumers directly to cater its inlining functions
using VM_OBJECT_LOCK()) imposes that all the vm/vm_pager.h
consumers now must include also sys/rwlock.h.
* zfs requires a quite convoluted fix to include FreeBSD rwlocks into
the compat layer because the name clash between FreeBSD and solaris
versions must be avoided.
At this purpose zfs redefines the vm_object locking functions
directly, isolating the FreeBSD components in specific compat stubs.

The KPI results heavilly broken by this commit. Thirdy part ports must
be updated accordingly (I can think off-hand of VirtualBox, for example).

Sponsored by: EMC / Isilon storage division
Reviewed by: jeff
Reviewed by: pjd (ZFS specific review)
Discussed with: alc
Tested by: pho

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# d241a0e6 26-Feb-2013 Xin LI <delphij@FreeBSD.org>

IFC @247348.


# 64a3476f 26-Feb-2013 Attilio Rao <attilio@FreeBSD.org>

Remove white spaces.

Sponsored by: EMC / Isilon storage division


# 0dde287b 26-Feb-2013 Attilio Rao <attilio@FreeBSD.org>

Wrap the sleeps synchronized by the vm_object lock into the specific
macro VM_OBJECT_SLEEP().
This hides some implementation details like the usage of the msleep()
primitive and the necessity to acce

Wrap the sleeps synchronized by the vm_object lock into the specific
macro VM_OBJECT_SLEEP().
This hides some implementation details like the usage of the msleep()
primitive and the necessity to access to the lock address directly.
For this reason VM_OBJECT_MTX() macro is now retired.

Sponsored by: EMC / Isilon storage division
Reviewed by: alc
Tested by: pho

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Revision tags: release/9.1.0
# 300675f6 27-Nov-2012 Alexander Motin <mav@FreeBSD.org>

MFC


# e477abf7 27-Nov-2012 Alexander Motin <mav@FreeBSD.org>

MFC @ r241285


# a10c6f55 11-Nov-2012 Neel Natu <neel@FreeBSD.org>

IFC @ r242684


# 23090366 04-Nov-2012 Simon J. Gerraty <sjg@FreeBSD.org>

Sync from head


# 140dedb8 02-Nov-2012 Konstantin Belousov <kib@FreeBSD.org>

The r241025 fixed the case when a binary, executed from nullfs mount,
was still possible to open for write from the lower filesystem. There
is a symmetric situation where the binary could already ha

The r241025 fixed the case when a binary, executed from nullfs mount,
was still possible to open for write from the lower filesystem. There
is a symmetric situation where the binary could already has file
descriptors opened for write, but it can be executed from the nullfs
overlay.

Handle the issue by passing one v_writecount reference to the lower
vnode if nullfs vnode has non-zero v_writecount. Note that only one
write reference can be donated, since nullfs only keeps one use
reference on the lower vnode. Always use the lower vnode v_writecount
for the checks.

Introduce the VOP_GET_WRITECOUNT to read v_writecount, which is
currently always bypassed to the lower vnode, and VOP_ADD_WRITECOUNT
to manipulate the v_writecount value, which manages a single bypass
reference to the lower vnode. Caling the VOPs instead of directly
accessing v_writecount provide the fix described in the previous
paragraph.

Tested by: pho
MFC after: 3 weeks

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