From: Andi Kleen <andi@firstfloor.org>
To: Mike Kravetz <mike.kravetz@oracle.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Davidlohr Bueso <dave@stgolabs.net>,
Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [PATCH 0/4] hugetlbfs: optionally reserve all fs pages at mount time
Date: Fri, 06 Mar 2015 14:13:33 -0800 [thread overview]
Message-ID: <87lhj9ai5u.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <1425432106-17214-1-git-send-email-mike.kravetz@oracle.com> (Mike Kravetz's message of "Tue, 3 Mar 2015 17:21:42 -0800")
Mike Kravetz <mike.kravetz@oracle.com> writes:
> hugetlbfs allocates huge pages from the global pool as needed. Even if
> the global pool contains a sufficient number pages for the filesystem
> size at mount time, those global pages could be grabbed for some other
> use. As a result, filesystem huge page allocations may fail due to lack
> of pages.
What's the difference of this new option to simply doing
mount -t hugetlbfs none /huge
echo XXX > /proc/sys/vm/nr_hugepages
?
-Andi
--
ak@linux.intel.com -- Speaking for myself only
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Mike Kravetz <mike.kravetz@oracle.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Davidlohr Bueso <dave@stgolabs.net>,
Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [PATCH 0/4] hugetlbfs: optionally reserve all fs pages at mount time
Date: Fri, 06 Mar 2015 14:13:33 -0800 [thread overview]
Message-ID: <87lhj9ai5u.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <1425432106-17214-1-git-send-email-mike.kravetz@oracle.com> (Mike Kravetz's message of "Tue, 3 Mar 2015 17:21:42 -0800")
Mike Kravetz <mike.kravetz@oracle.com> writes:
> hugetlbfs allocates huge pages from the global pool as needed. Even if
> the global pool contains a sufficient number pages for the filesystem
> size at mount time, those global pages could be grabbed for some other
> use. As a result, filesystem huge page allocations may fail due to lack
> of pages.
What's the difference of this new option to simply doing
mount -t hugetlbfs none /huge
echo XXX > /proc/sys/vm/nr_hugepages
?
-Andi
--
ak@linux.intel.com -- Speaking for myself only
next prev parent reply other threads:[~2015-03-06 22:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-04 1:21 [PATCH 0/4] hugetlbfs: optionally reserve all fs pages at mount time Mike Kravetz
2015-03-04 1:21 ` Mike Kravetz
2015-03-04 1:21 ` [PATCH 1/4] hugetlbfs: add reserved mount fields to subpool structure Mike Kravetz
2015-03-04 1:21 ` Mike Kravetz
2015-03-04 1:21 ` [PATCH 2/4] hugetlbfs: coordinate global and subpool reserve accounting Mike Kravetz
2015-03-04 1:21 ` Mike Kravetz
2015-03-04 1:21 ` [PATCH 3/4] hugetlbfs: accept subpool reserved option and setup accordingly Mike Kravetz
2015-03-04 1:21 ` Mike Kravetz
2015-03-04 1:21 ` [PATCH 4/4] hugetlbfs: document reserved mount option Mike Kravetz
2015-03-04 1:21 ` Mike Kravetz
2015-03-04 5:49 ` [PATCH 0/4] hugetlbfs: optionally reserve all fs pages at mount time David Rientjes
2015-03-04 5:49 ` David Rientjes
2015-03-04 17:21 ` Mike Kravetz
2015-03-04 17:21 ` Mike Kravetz
2015-03-06 22:13 ` Andi Kleen [this message]
2015-03-06 22:13 ` Andi Kleen
2015-03-06 22:30 ` Mike Kravetz
2015-03-06 22:30 ` Mike Kravetz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87lhj9ai5u.fsf@tassilo.jf.intel.com \
--to=andi@firstfloor.org \
--cc=akpm@linux-foundation.org \
--cc=aneesh.kumar@linux.vnet.ibm.com \
--cc=dave@stgolabs.net \
--cc=iamjoonsoo.kim@lge.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mike.kravetz@oracle.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.