On Wed, Apr 7, 2021 at 2:47 PM Nathan Chancellor wrote:
>
> Hi Bill,
>
> On Wed, Apr 07, 2021 at 02:17:04PM -0700, Bill Wendling wrote:
> > From: Sami Tolvanen
> >
> > Enable the use of clang's Profile-Guided Optimization[1]. To generate a
> > profile,
ve, unlike
the clang support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
Signed-off-by: Bill Wendling
Tested-by: Nick Desaulniers
Reviewed-by: Nick Desaulniers
Reviewed-by: Fangrui So
On Fri, Feb 26, 2021 at 2:20 PM Bill Wendling wrote:
>
> From: Sami Tolvanen
>
> Enable the use of clang's Profile-Guided Optimization[1]. To generate a
> profile, the kernel is instrumented with PGO counters, a representative
> workload is run, and the raw profile data is col
ve, unlike
the clang support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
Signed-off-by: Bill Wendling
---
v8: - Rebased on top-of-tree.
v7: - Fix minor build failure reported by Sedat.
Another bump for review. :-)
On Wed, Feb 10, 2021 at 3:25 PM Bill Wendling wrote:
>
> Bumping for review from Masahiro Yamada and Andrew Morton.
>
> -bw
>
> On Fri, Jan 22, 2021 at 2:12 AM Bill Wendling wrote:
> >
> > From: Sami Tolvanen
> >
> >
Bumping for review from Masahiro Yamada and Andrew Morton.
-bw
On Fri, Jan 22, 2021 at 2:12 AM Bill Wendling wrote:
>
> From: Sami Tolvanen
>
> Enable the use of clang's Profile-Guided Optimization[1]. To generate a
> profile, the kernel is instrumented with PGO counters, a
ve, unlike
the clang support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
Signed-off-by: Bill Wendling
Tested-by: Nick Desaulniers
---
v2: - Added "__llvm_profile_instrument_memop&q
would consider picking this up.
>
> On Sat, Jan 16, 2021 at 1:44 AM Bill Wendling wrote:
> >
> > From: Sami Tolvanen
> >
> > Enable the use of clang's Profile-Guided Optimization[1]. To generate a
> > profile, the kernel is instrumented with PGO counters
ve, unlike
the clang support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
Signed-off-by: Bill Wendling
Tested-by: Nick Desaulniers
---
v2: - Added "__llvm_profile_instrument_memop&q
On Mon, Jan 18, 2021 at 9:26 AM Sedat Dilek wrote:
>
> On Mon, Jan 18, 2021 at 1:39 PM Sedat Dilek wrote:
> >
> > On Mon, Jan 18, 2021 at 3:32 AM Bill Wendling wrote:
> > >
> > > On Sun, Jan 17, 2021 at 4:27 PM Sedat Dilek wrote:
> > > >
On Sun, Jan 17, 2021 at 4:27 PM Sedat Dilek wrote:
>
> [ big snip ]
[More snippage.]
> [ CC Fangrui ]
>
> With the attached...
>
>[PATCH v3] module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for
> undefined symbols
>
> ...I was finally able to boot into a rebuild PGO-optimized Linux-kernel.
> >
> > > > On Sun, Jan 17, 2021 at 12:23 PM Sedat Dilek
> > > > wrote:
> > > > >
> > > > > On Sun, Jan 17, 2021 at 11:53 AM Sedat Dilek
> > > > > wrote:
> > > > > >
> > > > > >
On Sat, Jan 16, 2021 at 9:39 AM Sedat Dilek wrote:
> On Sat, Jan 16, 2021 at 10:44 AM 'Bill Wendling' via Clang Built Linux
> wrote:
> >
> > From: Sami Tolvanen
> >
> > Enable the use of clang's Profile-Guided Optimization[1]. To generate a
> > profile,
ve, unlike
the clang support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
Signed-off-by: Bill Wendling
---
v2: - Added "__llvm_profile_instrument_memop" based on Nathan Chance
On Wed, Jan 13, 2021 at 12:55 PM Nathan Chancellor
wrote:
>
> Hi Bill,
>
> On Tue, Jan 12, 2021 at 10:19:58PM -0800, Bill Wendling wrote:
> > From: Sami Tolvanen
> >
> > Enable the use of clang's Profile-Guided Optimization[1]. To generate a
> > profile,
ve, unlike
the clang support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
Signed-off-by: Bill Wendling
Change-Id: Ic78e69c682286d3a44c4549a0138578c98138b77
---
v
and isn't
compatible with clang's gcov support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
Signed-off-by: Bill Wendling
---
v2: - Added "__llvm_profile_instrument_memop&q
and isn't
compatible with clang's gcov support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
Signed-off-by: Bill Wendling
---
Documentation/dev-tools/index.rst | 1 +
Documentation
On Mon, Jan 11, 2021 at 12:31 PM Fangrui Song wrote:
> On 2021-01-11, Bill Wendling wrote:
> >On Mon, Jan 11, 2021 at 12:12 PM Fangrui Song wrote:
> >>
> >> On 2021-01-11, 'Bill Wendling' via Clang Built Linux wrote:
> >> >From: Sami Tolvanen
> &g
On Mon, Jan 11, 2021 at 1:18 PM Nick Desaulniers
wrote:
>
> On Mon, Jan 11, 2021 at 1:04 PM Nathan Chancellor
> wrote:
> >
> > On Mon, Jan 11, 2021 at 12:18:21AM -0800, Bill Wendling wrote:
> > > From: Sami Tolvanen
> > >
> > > Enable
On Mon, Jan 11, 2021 at 12:12 PM Fangrui Song wrote:
>
> On 2021-01-11, 'Bill Wendling' via Clang Built Linux wrote:
> >From: Sami Tolvanen
> >
> >Enable the use of clang's Profile-Guided Optimization[1]. To generate a
> >profile, the kernel is instrumented with
On Mon, Jan 11, 2021 at 12:39 AM Sedat Dilek wrote:
>
> On Mon, Jan 11, 2021 at 9:18 AM 'Bill Wendling' via Clang Built Linux
> wrote:
> >
> > From: Sami Tolvanen
> >
> > Enable the use of clang's Profile-Guided Optimization[1]. To generate a
> > profi
n verified
to work with PGO.
Note that this method of profiling the kernel is clang-native and isn't
compatible with clang's gcov support in kernel/gcov.
[1] https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
Signed-off-by: Sami Tolvanen
Co-developed-by: Bill Wendling
is shouldn't matter in
general, but there are some tools out there that expect the build id
to be of a certain length, i.e. the BFD style's length, because BFD is
more prevalent. The obvious response "well, why don't they just change
the expected length?" is difficult in all situations
ld's --build-id defaults to "sha1" style, while lld defaults to "fast".
The build IDs are very different between the two, which may confuse
programs that reference them.
Signed-off-by: Bill Wendling
---
Makefile | 4 ++--
arch/arm/vdso/Makefi
On Tue, Sep 15, 2020 at 4:40 PM Andrew Cooper wrote:
>
> On 16/09/2020 00:11, Andy Lutomirski wrote:
> >> On Sep 15, 2020, at 2:24 PM, Nick Desaulniers
> >> wrote:
> >>
> >> On Tue, Sep 15, 2020 at 1:56 PM Andy Lutomirski wrote:
> >>> The old smap_save() code was:
> >>>
> >>> pushf
> >>>
On Tue, Sep 15, 2020 at 2:24 PM Nick Desaulniers
wrote:
> On Tue, Sep 15, 2020 at 1:56 PM Andy Lutomirski wrote:
> > Fixes: e74deb11931f ("x86/uaccess: Introduce user_access_{save,restore}()")
> > Cc: sta...@vger.kernel.org
> > Reported-by: Bill Wendling # I thin
On Tue, Jun 30, 2020 at 3:48 PM Hao Luo wrote:
>
> On Tue, Jun 30, 2020 at 1:37 PM Yonghong Song wrote:
> >
> > On 6/30/20 11:49 AM, Hao Luo wrote:
> > > The test_vmlinux test uses hrtimer_nanosleep as hook to test tracing
> > > programs. But it seems Clang may have done an aggressive
Possibly. I'd need to ask him. :-)
On Thu, Jul 18, 2019 at 2:22 PM Nick Desaulniers
wrote:
>
> On Thu, Jul 18, 2019 at 2:18 PM Bill Wendling wrote:
> >
> > Top-of-tree clang says that it's const:
> >
> > $ gcc a.c -O2 && ./a.out
> > a is
[My previous response was marked as spam...]
Top-of-tree clang says that it's const:
$ gcc a.c -O2 && ./a.out
a is a const.
$ clang a.c -O2 && ./a.out
a is a const.
On Thu, Jul 18, 2019 at 2:10 PM Nick Desaulniers
wrote:
>
> On Thu, Jul 18, 2019 at 2:01 PM Qian Cai wrote:
> >
> >
> >
> > >
Hi all,
Question: Does Linux support >2G files and, if so, how do I implement
this?
Thanks.
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More m
Hi all,
Question: Does Linux support 2G files and, if so, how do I implement
this?
Thanks.
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More majordomo info
then bad things could happen...
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Pl
bad things could happen...
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Please r
key, but we were originally
} > talking about extending ext2, so such massive changes are out of question
} > and your log n access argument is right.
} >
}
} It would still be tricky since you have to have actual files in the
} filesystem as well.
}
But that's just a user space iss
such massive changes are out of question
} and your log n access argument is right.
}
}
} It would still be tricky since you have to have actual files in the
} filesystem as well.
}
But that's just a user space issue, isn't it.
(Just kidding :-)
--
|| Bill Wendling
gt; If i see well, then this is always same whether CONFIG_IDEDMA_IVB is
} > defined or not.
} > What's the clue?
}
[snip...]
The use of the ternary operator is superfluous, though...and makes the
code look ugly IMNSHO :).
--
|| Bill Wendling[EMAIL PROTECTED]
-
To uns
...]
The use of the ternary operator is superfluous, though...and makes the
code look ugly IMNSHO :).
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More
Source?
}
With the horrid (pro-Microsoft) Aschroft in office, who knows what MS can
get away with. Not to mention all of the pro-business, anti-human cronies
in Washington running the Presidency (cause \/\/ just can't do it).
--
|| Bill Wendling[EMAIL PROTECTED
Source?
}
With the horrid (pro-Microsoft) Aschroft in office, who knows what MS can
get away with. Not to mention all of the pro-business, anti-human cronies
in Washington running the Presidency (cause \/\/ just can't do it).
--
|| Bill Wendling[EMAIL PROTECTED
/208]
[system_call+51/56]
Feb 12 16:03:17 dangermouse kernel:
Feb 12 16:03:17 dangermouse kernel: Code: 8b 70 08 8b 46 3c 8b 56 40 89
41 3c 0f ac d0 09 89 41 54 8b
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] [sys_lseek+196/208]
[system_call+51/56]
Feb 12 16:03:17 dangermouse kernel:
Feb 12 16:03:17 dangermouse kernel: Code: 8b 70 08 8b 46 3c 8b 56 40 89
41 3c 0f ac d0 09 89 41 54 8b
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Hi all,
Is anyone working on porting the driver for Lucent Technologies's WaveLAN
Gold wireless ethernet card to the 2.4.x kernel?
Just didn't want to duplicate effort.
Thanks!
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Hi all,
Is anyone working on porting the driver for Lucent Technologies's WaveLAN
Gold wireless ethernet card to the 2.4.x kernel?
Just didn't want to duplicate effort.
Thanks!
--
|| Bill Wendling[EMAIL PROTECTED]
-
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but I
} am unable to do either a select or a poll on them. Does any one know what I
} can do to fix this?
}
Hi Micah,
Which kernel version are you using?
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|| Bill Wendling[EMAIL PROTECTED]
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but I
} am unable to do either a select or a poll on them. Does any one know what I
} can do to fix this?
}
Hi Micah,
Which kernel version are you using?
--
|| Bill Wendling[EMAIL PROTECTED]
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Also sprach Miles Lane:
} Bill Wendling wrote:
}
} > Also sprach Keith Owens:
} > } On Thu, 04 Jan 2001 21:54:29 -0800,
} > } Miles Lane <[EMAIL PROTECTED]> wrote:
} > } >make[4]: Entering directory `/usr/src/linux/drivers/acpi'
} > } >/usr/src/linux/Rules.make:
work as well...
--
|| Bill Wendling[EMAIL PROTECTED]
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Please read the FAQ at http://www.tux.org/lkml/
...
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|| Bill Wendling[EMAIL PROTECTED]
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Please read the FAQ at http://www.tux.org/lkml/
CONFIG_APM_IGNORE_SUSPEND_BOUNCE=y
# CONFIG_APM_RTC_IS_GMT is not set
# CONFIG_APM_ALLOWS_INTS is not set
# CONFIG_APM_REAL_MODE_POWER_OFF is not set
I've tried the 2.4.0test* kernels with similar results...
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CONFIG_APM_IGNORE_SUSPEND_BOUNCE=y
# CONFIG_APM_RTC_IS_GMT is not set
# CONFIG_APM_ALLOWS_INTS is not set
# CONFIG_APM_REAL_MODE_POWER_OFF is not set
I've tried the 2.4.0test* kernels with similar results...
--
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ers?
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|| Bill Wendling[EMAIL PROTECTED]
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Please read the FAQ at http://www.tux.org/lkml/
. It was buggy, is buggy
} and will be buggy. It is inavoidable, as soon as you have hundreds
} of drivers.
}
If they are buggy and unsupported, why aren't they being expunged from
the main source tree and placed into a ``contrib'' directory or something
for people who may want those drivers?
--
|| Bill
t; sync flush (wait for I/O completation) */
int balance_dirty_state(kdev_t dev)
{
Which leads me to believe that the `<' should be either `==' or `<='. I
tried it with the `<=' and it doesn't seem to be so bad...Here's a patch
to see if it helps you?
--
|| Bill Wendling[EMAIL
dev)
{
Which leads me to believe that the `' should be either `==' or `='. I
tried it with the `=' and it doesn't seem to be so bad...Here's a patch
to see if it helps you?
--
|| Bill Wendling[EMAIL PROTECTED]
--- linux/fs/buffer.c Sat Oct 21 02:55:41 2000
+++ linux
for convenience, but I don't believe it's in the
standard.
--
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Please read the FAQ at http://www.tux.org/lkml/
timing test indicate
} > that the new code is significantly quicker.
}
} This is something the compiler ought to know about.
}
A compiler can only guess so much. Don't look to a compiler to fix poorly
written code...
--
|| Bill Wendling[EMAIL PROTECTED]
-
To unsubscribe fr
ings is to look
at what the standard says and follow it. All else is hopes and wishes.
The above code is specified as working in the standard (evaluating the
assign and then evaluating the 2).
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s is to look
at what the standard says and follow it. All else is hopes and wishes.
The above code is specified as working in the standard (evaluating the
assign and then evaluating the 2).
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-
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nificantly quicker.
}
} This is something the compiler ought to know about.
}
A compiler can only guess so much. Don't look to a compiler to fix poorly
written code...
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|| Bill Wendling[EMAIL PROTECTED]
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for convenience, but I don't believe it's in the
standard.
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Please read the FAQ at http://www.tux.org/lkml/
curances where I get the IRQ
} (yes, I'm sure of it) but flagvar == 1, which confuses me.
}
Are you sure there isn't a race on the flagvar variable? Like, the
interrupt happens, it gets set to 0, then before we can ``up'' the
semaphore, it's set to 1 in the function_called_from_kernel_thread()?
gt;8;
}
} 6 shift
} 4 and
} 3 or
}
Plus 3 assigns...but they may get optimized out. :)
} instead of
}
} 8 shift
} 8 and
} 7 or
}
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Please read the FAQ at http://www.tux.org/lkml/
out. :)
} instead of
}
} 8 shift
} 8 and
} 7 or
}
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|| Bill Wendling[EMAIL PROTECTED]
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Please read the FAQ at http://www.tux.org/lkml/
curances where I get the IRQ
} (yes, I'm sure of it) but flagvar == 1, which confuses me.
}
Are you sure there isn't a race on the flagvar variable? Like, the
interrupt happens, it gets set to 0, then before we can ``up'' the
semaphore, it's set to 1 in the function_called_from_kernel_thread()?
joy!
--
|| Bill Wendling[EMAIL PROTECTED]
--- linux-2.4.0-test9-pre1/mm/filemap.c Sat Sep 16 02:21:03 2000
+++ linux-2.4.0-test9-pre1-new/mm/filemap.c Sat Sep 16 02:31:54 2000
@@ -193,12 +193,10 @@
repeat:
head = >pages;
spin_lock(_lock);
- curr = head
!
--
|| Bill Wendling[EMAIL PROTECTED]
--- linux-2.4.0-test9-pre1/mm/filemap.c Sat Sep 16 02:21:03 2000
+++ linux-2.4.0-test9-pre1-new/mm/filemap.c Sat Sep 16 02:31:54 2000
@@ -193,12 +193,10 @@
repeat:
head = mapping-pages;
spin_lock(pagecache_lock
Also sprach Juan J. Quintela:
} >>>>> "bill" == Bill Wendling <[EMAIL PROTECTED]> writes:
}
} Hi
}
} Linus, please don't apply.
}
} bill> - The `head = >pages;' statement is useless inside the
} bill> repeat, since head isn't m
Also sprach David Mansfield:
} Bill Wendling wrote:
} >
} > Hi Linus,
} >
} > Here's a small optimization for the mm/filemap.c file.
} >
} > - The `head = >pages;' statement is useless inside the
} > repeat, since head isn't modified inside the loop.
taken. I changed the while() into a for() loop
to accomodate this better.
Share and enjoy!
--
|| Bill Wendling[EMAIL PROTECTED]
--- linux-2.4.0-test8/mm/filemap.c Sat Sep 9 02:35:09 2000
+++ linux-2.4.0-test8-new/mm/filemap.c Thu Sep 14 03:14:0
Also sprach dean gaudet:
} On Thu, 7 Sep 2000, Bill Wendling wrote:
} > Don't be stupid.
}
} dude, i gave at least three hints that i was joking up there. stupid
} would be if i claimed that it was obvious that a debugger would have
} helped this situation. instead all i'm claim
if you don't have a debugger you're forced to "think about the code
} to find the correct fix"? so, like, why are you guessing right now? :)
}
Don't be stupid.
Because some bugs are very hard to fix no matter what tool/brain you
throw at it...
--
|| Bill Wendling
don't have a debugger you're forced to "think about the code
} to find the correct fix"? so, like, why are you guessing right now? :)
}
Don't be stupid.
Because some bugs are very hard to fix no matter what tool/brain you
throw at it...
--
|| Bill Wendling[EMAIL
Also sprach dean gaudet:
} On Thu, 7 Sep 2000, Bill Wendling wrote:
} Don't be stupid.
}
} dude, i gave at least three hints that i was joking up there. stupid
} would be if i claimed that it was obvious that a debugger would have
} helped this situation. instead all i'm claiming is that it's
ax):(v)))
}
} Or perhaps this is a lot better:
}
} #define FIT(v,min,max) ((v)>(max)?(max):((v)<(min)?(min):(v)))
}
*pukes*
Wouldn't an inline'd function be much much more readable/maintainable??
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-
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:
}
} #define FIT(v,min,max) ((v)(max)?(max):((v)(min)?(min):(v)))
}
*pukes*
Wouldn't an inline'd function be much much more readable/maintainable??
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