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Filename Latest commit message Latest commit date
Zhihao Cheng d95e0367fd ubifs: Rectify space amount budget for mkdir/tmpfile operations 
[ Upstream commit a6dab6607d4681d227905d5198710b575dbdb519 ]

UBIFS should make sure the flash has enough space to store dirty (Data
that is newer than disk) data (in memory), space budget is exactly
designed to do that. If space budget calculates less data than we need,
'make_reservation()' will do more work(return -ENOSPC if no free space
lelf, sometimes we can see "cannot reserve xxx bytes in jhead xxx, error
-28" in ubifs error messages) with ubifs inodes locked, which may effect
other syscalls.

A simple way to decide how much space do we need when make a budget:
See how much space is needed by 'make_reservation()' in ubifs_jnl_xxx()
function according to corresponding operation.

It's better to report ENOSPC in ubifs_budget_space(), as early as we can.

Fixes: 474b93704f ("ubifs: Implement O_TMPFILE")
Fixes: 1e51764a3c ("UBIFS: add new flash file system")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-15 14:18:31 +02:00
arch KVM: x86: Forbid VMM to set SYNIC/STIMER MSRs when SynIC wasn't activated 2022-04-15 14:18:31 +02:00
block Revert "Revert "block, bfq: honor already-setup queue merges"" 2022-04-15 14:18:23 +02:00
certs
crypto
Documentation dt-bindings: spi: mxic: The interrupt property is not mandatory 2022-04-15 14:18:30 +02:00
drivers ubi: fastmap: Return error code if memory allocation fails in add_aeb() 2022-04-15 14:18:30 +02:00
fs ubifs: Rectify space amount budget for mkdir/tmpfile operations 2022-04-15 14:18:31 +02:00
include bpf: Fix comment for helper bpf_current_task_under_cgroup() 2022-04-15 14:18:30 +02:00
init
ipc
kernel dma-debug: fix return value of __setup handlers 2022-04-15 14:18:18 +02:00
lib XArray: Update the LRU list in xas_split() 2022-04-15 14:18:28 +02:00
LICENSES
mm mm/usercopy: return 1 from hardened_usercopy __setup() handler 2022-04-15 14:18:30 +02:00
net openvswitch: Fixed nd target mask field in the flow dump. 2022-04-15 14:18:31 +02:00
samples
scripts gcc-plugins/stackleak: Exactly match strings instead of prefixes 2022-04-15 14:18:22 +02:00
security Fix incorrect type in assignment of ipv6 port for audit 2022-04-15 14:18:22 +02:00
sound ASoC: topology: Allow TLV control to be either read or write 2022-04-15 14:18:30 +02:00
tools bpf: Fix comment for helper bpf_current_task_under_cgroup() 2022-04-15 14:18:30 +02:00
usr
virt KVM: Prevent module exit until all VMs are freed 2022-04-15 14:18:27 +02:00
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README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.