From: Pasha Tatashin <pasha.tatashin@soleen.com>
To: pasha.tatashin@soleen.com, sashal@kernel.org,
ebiederm@xmission.com, rburanyi@google.com, gthelen@google.com,
viro@zeniv.linux.org.uk, kexec@lists.infradead.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/2] Allow to kexec with initramfs larger than 2G
Date: Fri, 27 May 2022 02:55:33 +0000 [thread overview]
Message-ID: <20220527025535.3953665-1-pasha.tatashin@soleen.com> (raw)
Currently, the largest initramfs that is supported by kexec_file_load()
syscall is 2G.
This is because kernel_read_file() returns int, and is limited to
INT_MAX or 2G.
On the other hand, there are kexec based boot loaders (i.e. u-root),
that may need to boot netboot images that might be larger than 2G.
The first patch changes the return type from int to ssize_t in
kernel_read_file* functions.
The second patch increases the maximum initramfs file size to 4G.
Tested: verified that can kexec_file_load() works with 4G initramfs
on x86_64.
Pasha Tatashin (2):
fs/kernel_read_file: Allow to read files up-to ssize_t
kexec_file: Increase maximum file size to 4G
fs/kernel_read_file.c | 38 ++++++++++++++++----------------
include/linux/kernel_read_file.h | 32 +++++++++++++--------------
include/linux/limits.h | 1 +
kernel/kexec_file.c | 10 ++++++---
4 files changed, 43 insertions(+), 38 deletions(-)
--
2.36.1.124.g0e6072fb45-goog
WARNING: multiple messages have this Message-ID (diff)
From: Pasha Tatashin <pasha.tatashin@soleen.com>
To: kexec@lists.infradead.org
Subject: [PATCH v2 0/2] Allow to kexec with initramfs larger than 2G
Date: Fri, 27 May 2022 02:55:33 +0000 [thread overview]
Message-ID: <20220527025535.3953665-1-pasha.tatashin@soleen.com> (raw)
Currently, the largest initramfs that is supported by kexec_file_load()
syscall is 2G.
This is because kernel_read_file() returns int, and is limited to
INT_MAX or 2G.
On the other hand, there are kexec based boot loaders (i.e. u-root),
that may need to boot netboot images that might be larger than 2G.
The first patch changes the return type from int to ssize_t in
kernel_read_file* functions.
The second patch increases the maximum initramfs file size to 4G.
Tested: verified that can kexec_file_load() works with 4G initramfs
on x86_64.
Pasha Tatashin (2):
fs/kernel_read_file: Allow to read files up-to ssize_t
kexec_file: Increase maximum file size to 4G
fs/kernel_read_file.c | 38 ++++++++++++++++----------------
include/linux/kernel_read_file.h | 32 +++++++++++++--------------
include/linux/limits.h | 1 +
kernel/kexec_file.c | 10 ++++++---
4 files changed, 43 insertions(+), 38 deletions(-)
--
2.36.1.124.g0e6072fb45-goog
next reply other threads:[~2022-05-27 2:55 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-27 2:55 Pasha Tatashin [this message]
2022-05-27 2:55 ` [PATCH v2 0/2] Allow to kexec with initramfs larger than 2G Pasha Tatashin
2022-05-27 2:55 ` [PATCH v2 1/2] fs/kernel_read_file: Allow to read files up-to ssize_t Pasha Tatashin
2022-05-27 2:55 ` Pasha Tatashin
2022-06-06 2:45 ` Baoquan He
2022-06-06 2:45 ` Baoquan He
2022-06-07 15:52 ` Pasha Tatashin
2022-06-07 15:52 ` Pasha Tatashin
2022-06-08 0:57 ` Baoquan He
2022-06-08 0:57 ` Baoquan He
2022-06-08 0:58 ` Baoquan He
2022-06-08 0:58 ` Baoquan He
2022-05-27 2:55 ` [PATCH v2 2/2] kexec_file: Increase maximum file size to 4G Pasha Tatashin
2022-05-27 2:55 ` Pasha Tatashin
2022-06-06 2:56 ` Baoquan He
2022-06-06 2:56 ` Baoquan He
2022-06-07 16:02 ` Pasha Tatashin
2022-06-07 16:02 ` Pasha Tatashin
2022-06-08 0:28 ` Baoquan He
2022-06-08 0:28 ` Baoquan He
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