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From: Qian Cai <cai@lca.pw>
To: "Gary B. Genett" <me@garybgenett.net>
Cc: Hugh Dickins <hughd@google.com>, linux-mm@kvack.org
Subject: Re: [PATCH] shmem: add shmem_size option for full filesystem
Date: Wed, 9 Oct 2019 07:12:06 -0400	[thread overview]
Message-ID: <E278467F-D56E-4906-AD8A-1035F3A962D1@lca.pw> (raw)
In-Reply-To: <20191008201710.GA21892@spider>



> On Oct 8, 2019, at 4:17 PM, Gary B. Genett <me@garybgenett.net> wrote:
> 
> Adds a kernel configuration option to specify the size of the shmem
> filesystem.  It is currently hard-coded to 50% of memory.  Users should
> have the option to set this value as they see fit.
> 
> A specific case where this would be necessary is if the initramfs were
> larger than half of the memory, such as a 2.5GB "live" filesystem on
> a system with 4GB of memory.  Without this option, this causes a kernel
> panic.  With this option, the user may specify the number of pages of
> memory they need for their root filesystem.
> 
> This patch creates the SHMEM_SIZE configuration option, which is
> specified as the number of memory pages to use for the shmem
> filesystem.  The default remains unchanged.  This patch has no impact
> unless the values are changed.
> 
> The option is marked as expert, and the help text is clear that it
> should only be set if the user knows what they are doing.

Hide it under the EXPERT does not mean the bar is lower to justify when introduced a new config option. What’s the benefits of this vs squashfs/resize?

  reply	other threads:[~2019-10-09 11:12 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-08 20:17 [PATCH] shmem: add shmem_size option for full filesystem Gary B. Genett
2019-10-09 11:12 ` Qian Cai [this message]
2019-10-09 18:45   ` -Gary-
2019-10-09 11:56 ` Vlastimil Babka

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