🚨 EUVD-2026-115284
📊 n/a
🏢 Linux
📝 In the Linux kernel, the following vulnerability has been resolved:
ntfs: fix race between fallocate and mmap reads
The fallocate implementation only takes...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-115284
#cybersecurity #infosec #cve #euvd
📊 n/a
🏢 Linux
📝 In the Linux kernel, the following vulnerability has been resolved:
ntfs: fix race between fallocate and mmap reads
The fallocate implementation only takes...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-115284
#cybersecurity #infosec #cve #euvd
November 2, 2026 at 5:01 PM
🚨 EUVD-2026-115284
📊 n/a
🏢 Linux
📝 In the Linux kernel, the following vulnerability has been resolved:
ntfs: fix race between fallocate and mmap reads
The fallocate implementation only takes...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-115284
#cybersecurity #infosec #cve #euvd
📊 n/a
🏢 Linux
📝 In the Linux kernel, the following vulnerability has been resolved:
ntfs: fix race between fallocate and mmap reads
The fallocate implementation only takes...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-115284
#cybersecurity #infosec #cve #euvd
Linux 7.4、FAT32のfallocateを最大265倍高速化。whileループ6行の削除で実現
Linux 7.4、FAT32のfallocateを最大265倍高速化。whileループ6行の削除で実現
USBメモリやSDカードで今も現役のFAT32に、Linux 7.4で桁違いの高速化が入る。ディスク領域の事前確保が最大265倍速くなった。変更の核心は、whileループの削除。たった数行のコード変更が、なぜここまでの差を生むのか。
joho-todai.com
October 29, 2026 at 11:28 PM
Linux 7.4、FAT32のfallocateを最大265倍高速化。whileループ6行の削除で実現
Ever been baffled why `ls` and `du`
#Linux #Filesystem #Ext4 #Sysadmin
https://mustafaerbay.com.tr/en/blog/tutorials/dosyanin-yuzde-99-98-i-sifirdi-fallocate-tek-bayt-kazandirmadi/
#Linux #Filesystem #Ext4 #Sysadmin
https://mustafaerbay.com.tr/en/blog/tutorials/dosyanin-yuzde-99-98-i-sifirdi-fallocate-tek-bayt-kazandirmadi/
The File Was 99.98% Zeros and fallocate Freed Nothing
Why ls and du disagree about sparse files, when fallocate -d reclaims space and when it reclaims none at all: a measured field guide.
mustafaerbay.com.tr
October 20, 2026 at 3:43 PM
Ever been baffled why `ls` and `du`
#Linux #Filesystem #Ext4 #Sysadmin
https://mustafaerbay.com.tr/en/blog/tutorials/dosyanin-yuzde-99-98-i-sifirdi-fallocate-tek-bayt-kazandirmadi/
#Linux #Filesystem #Ext4 #Sysadmin
https://mustafaerbay.com.tr/en/blog/tutorials/dosyanin-yuzde-99-98-i-sifirdi-fallocate-tek-bayt-kazandirmadi/
Bu dosya beni ne uğraştırdı!
#Linux #DosyaSistemi #Ext4 #SistemYonetimi
https://mustafaerbay.com.tr/blog/tutorials/dosyanin-yuzde-99-98-i-sifirdi-fallocate-tek-bayt-kazandirmadi/
#Linux #DosyaSistemi #Ext4 #SistemYonetimi
https://mustafaerbay.com.tr/blog/tutorials/dosyanin-yuzde-99-98-i-sifirdi-fallocate-tek-bayt-kazandirmadi/
Dosyanın Yüzde 99,98'i Sıfırdı, fallocate Tek Bayt Kazandırmadı
Seyrek dosyalarda ls ile du neden farklı konuşur, fallocate -d ne zaman yer açar, ne zaman hiç açmaz: ölçümlü bir saha rehberi.
mustafaerbay.com.tr
October 20, 2026 at 3:42 PM
Bu dosya beni ne uğraştırdı!
#Linux #DosyaSistemi #Ext4 #SistemYonetimi
https://mustafaerbay.com.tr/blog/tutorials/dosyanin-yuzde-99-98-i-sifirdi-fallocate-tek-bayt-kazandirmadi/
#Linux #DosyaSistemi #Ext4 #SistemYonetimi
https://mustafaerbay.com.tr/blog/tutorials/dosyanin-yuzde-99-98-i-sifirdi-fallocate-tek-bayt-kazandirmadi/
#til: fallocate(1) https://www.man7.org/linux/man-pages/man1/fallocate.1.html
```
$ time fallocate -l 2G /mnt/data.img
fallocate -l 2G /mnt/data.img 0.00s user 0.00s system 36% cpu 0.008 total
$ ls -l /mnt/sw-data.img
-rw-rw-r-- 1 shtrom shtrom 2147483648 Oct 11 20:59 /mnt/data.img
```
Beats […]
```
$ time fallocate -l 2G /mnt/data.img
fallocate -l 2G /mnt/data.img 0.00s user 0.00s system 36% cpu 0.008 total
$ ls -l /mnt/sw-data.img
-rw-rw-r-- 1 shtrom shtrom 2147483648 Oct 11 20:59 /mnt/data.img
```
Beats […]
Original post on piaille.fr
piaille.fr
October 11, 2026 at 10:01 AM
#til: fallocate(1) https://www.man7.org/linux/man-pages/man1/fallocate.1.html
```
$ time fallocate -l 2G /mnt/data.img
fallocate -l 2G /mnt/data.img 0.00s user 0.00s system 36% cpu 0.008 total
$ ls -l /mnt/sw-data.img
-rw-rw-r-- 1 shtrom shtrom 2147483648 Oct 11 20:59 /mnt/data.img
```
Beats […]
```
$ time fallocate -l 2G /mnt/data.img
fallocate -l 2G /mnt/data.img 0.00s user 0.00s system 36% cpu 0.008 total
$ ls -l /mnt/sw-data.img
-rw-rw-r-- 1 shtrom shtrom 2147483648 Oct 11 20:59 /mnt/data.img
```
Beats […]
Quick Linux Tip #94
Q: My server is low on RAM but has no swap partition. How do I add swap?
Try:
`sudo fallocate -l 4G /swapfile`
`sudo chmod 600 /swapfile`
`sudo mkswap /swapfile`
`sudo swapon /swapfile`
Info: Instantly creates, secures, and activates swap files
Follow @linuxteck.bsky.social
Q: My server is low on RAM but has no swap partition. How do I add swap?
Try:
`sudo fallocate -l 4G /swapfile`
`sudo chmod 600 /swapfile`
`sudo mkswap /swapfile`
`sudo swapon /swapfile`
Info: Instantly creates, secures, and activates swap files
Follow @linuxteck.bsky.social
October 9, 2026 at 4:13 AM
Quick Linux Tip #94
Q: My server is low on RAM but has no swap partition. How do I add swap?
Try:
`sudo fallocate -l 4G /swapfile`
`sudo chmod 600 /swapfile`
`sudo mkswap /swapfile`
`sudo swapon /swapfile`
Info: Instantly creates, secures, and activates swap files
Follow @linuxteck.bsky.social
Q: My server is low on RAM but has no swap partition. How do I add swap?
Try:
`sudo fallocate -l 4G /swapfile`
`sudo chmod 600 /swapfile`
`sudo mkswap /swapfile`
`sudo swapon /swapfile`
Info: Instantly creates, secures, and activates swap files
Follow @linuxteck.bsky.social
🚨 EUVD-2026-86955
📊 n/a
🏢 Linux
📝 In the Linux kernel, the following vulnerability has been resolved:
smb/client: invalidate fscache for fallocate range operations
smb3_zero_range(), smb3_pun...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-86955
#cybersecurity #infosec #cve #euvd
📊 n/a
🏢 Linux
📝 In the Linux kernel, the following vulnerability has been resolved:
smb/client: invalidate fscache for fallocate range operations
smb3_zero_range(), smb3_pun...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-86955
#cybersecurity #infosec #cve #euvd
September 25, 2026 at 12:04 PM
🚨 EUVD-2026-86955
📊 n/a
🏢 Linux
📝 In the Linux kernel, the following vulnerability has been resolved:
smb/client: invalidate fscache for fallocate range operations
smb3_zero_range(), smb3_pun...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-86955
#cybersecurity #infosec #cve #euvd
📊 n/a
🏢 Linux
📝 In the Linux kernel, the following vulnerability has been resolved:
smb/client: invalidate fscache for fallocate range operations
smb3_zero_range(), smb3_pun...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-86955
#cybersecurity #infosec #cve #euvd
SMB subsystem lands wave of security and data-corruption fixes
ksmbd gets hardened against heap leaks and buffer overflows, the CIFS client fixes multiple fallocate data-corruption bugs, and Ste…
#DataCorruption #Fallocate #Ksmbd #Security #SMB
https://kerneldispatch.com/posts/mainline-2026-09-02
ksmbd gets hardened against heap leaks and buffer overflows, the CIFS client fixes multiple fallocate data-corruption bugs, and Ste…
#DataCorruption #Fallocate #Ksmbd #Security #SMB
https://kerneldispatch.com/posts/mainline-2026-09-02
September 2, 2026 at 1:47 PM
SMB subsystem lands wave of security and data-corruption fixes
ksmbd gets hardened against heap leaks and buffer overflows, the CIFS client fixes multiple fallocate data-corruption bugs, and Ste…
#DataCorruption #Fallocate #Ksmbd #Security #SMB
https://kerneldispatch.com/posts/mainline-2026-09-02
ksmbd gets hardened against heap leaks and buffer overflows, the CIFS client fixes multiple fallocate data-corruption bugs, and Ste…
#DataCorruption #Fallocate #Ksmbd #Security #SMB
https://kerneldispatch.com/posts/mainline-2026-09-02
O EXT4 no Linux 7.3 está insano! 📈 De 1,92M para 2,19M IOPS com SSDs PCIe Gen5. Parallel DIO writes, otimizações no fallocate() e muito mais. Artigo completo com todos os detalhes. Saiba mais -> tinyurl.com/mp4z29s6
EXT4 no Linux 7.3: As Melhorias de Performance que Estão Revolucionando o Armazenamento
Blog com notícias sobre, Linux, Android, Segurança , etc
tinyurl.com
August 20, 2026 at 11:49 AM
O EXT4 no Linux 7.3 está insano! 📈 De 1,92M para 2,19M IOPS com SSDs PCIe Gen5. Parallel DIO writes, otimizações no fallocate() e muito mais. Artigo completo com todos os detalhes. Saiba mais -> tinyurl.com/mp4z29s6
[Foundation devlog (2)]
* Remove and Insert calls added.
* host_file Remove is NI; host_file Insert is written but untested.
These use Linux's `fallocate` where possible!
* [!] driver Remove and Insert are NI.
* Preparation for the new Size, Clear, Delete, and Create calls.
* Source code bugfix […]
* Remove and Insert calls added.
* host_file Remove is NI; host_file Insert is written but untested.
These use Linux's `fallocate` where possible!
* [!] driver Remove and Insert are NI.
* Preparation for the new Size, Clear, Delete, and Create calls.
* Source code bugfix […]
Original post on social.golemwire.com
social.golemwire.com
August 19, 2026 at 1:44 AM
[Foundation devlog (2)]
* Remove and Insert calls added.
* host_file Remove is NI; host_file Insert is written but untested.
These use Linux's `fallocate` where possible!
* [!] driver Remove and Insert are NI.
* Preparation for the new Size, Clear, Delete, and Create calls.
* Source code bugfix […]
* Remove and Insert calls added.
* host_file Remove is NI; host_file Insert is written but untested.
These use Linux's `fallocate` where possible!
* [!] driver Remove and Insert are NI.
* Preparation for the new Size, Clear, Delete, and Create calls.
* Source code bugfix […]
hey util-linux, what's been going on with you lately?
util-linux: "addpart, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu, chfn, chmem, chrt, chsh, col, colcrt, colrm, column, commands.txt, ctrlaltdel, delpart, dmesg, eject, enosys, exch, fadvise, fallocate, fdformat, fdisk, fincore,
util-linux: "addpart, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu, chfn, chmem, chrt, chsh, col, colcrt, colrm, column, commands.txt, ctrlaltdel, delpart, dmesg, eject, enosys, exch, fadvise, fallocate, fdformat, fdisk, fincore,
May 28, 2025 at 4:01 AM
hey util-linux, what's been going on with you lately?
util-linux: "addpart, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu, chfn, chmem, chrt, chsh, col, colcrt, colrm, column, commands.txt, ctrlaltdel, delpart, dmesg, eject, enosys, exch, fadvise, fallocate, fdformat, fdisk, fincore,
util-linux: "addpart, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu, chfn, chmem, chrt, chsh, col, colcrt, colrm, column, commands.txt, ctrlaltdel, delpart, dmesg, eject, enosys, exch, fadvise, fallocate, fdformat, fdisk, fincore,
and honestly it just makes the code easier to reason about in general. we don't need to code golf every script!
(but also fallocate is better than dd for this usecase :P)
(but also fallocate is better than dd for this usecase :P)
October 5, 2023 at 2:05 PM
and honestly it just makes the code easier to reason about in general. we don't need to code golf every script!
(but also fallocate is better than dd for this usecase :P)
(but also fallocate is better than dd for this usecase :P)
I think a very useful and underrated Linux thing is being able to instantly create a file of any arbitrary size without physically having to write all those bytes. Dependent on file system of course.
`fallocate`
`fallocate`
November 10, 2024 at 9:15 PM
I think a very useful and underrated Linux thing is being able to instantly create a file of any arbitrary size without physically having to write all those bytes. Dependent on file system of course.
`fallocate`
`fallocate`
sudo fallocate -l 100G /google-drive
December 3, 2025 at 7:30 PM
sudo fallocate -l 100G /google-drive
結論、fallocate は事前に行うと I/O 時に inode の更新回数や block allocation の回数を大きく減らし、さらに disk 上で consecutive な allocation を可能とするが、自分の環境 (ext4, DIRECT I/O) では block sequential / random write のレインテシには大きな影響がない。できれば xfs でも試して見たい。
March 25, 2025 at 3:10 PM
結論、fallocate は事前に行うと I/O 時に inode の更新回数や block allocation の回数を大きく減らし、さらに disk 上で consecutive な allocation を可能とするが、自分の環境 (ext4, DIRECT I/O) では block sequential / random write のレインテシには大きな影響がない。できれば xfs でも試して見たい。
ポインタを見つけた
lwn.net/Articles/100...
lwn.net/Articles/100...
fallocate: introduce FALLOC_FL_FORCE_ZERO flag [LWN.net]
lwn.net
March 25, 2025 at 12:33 AM
ポインタを見つけた
lwn.net/Articles/100...
lwn.net/Articles/100...
ext4 における fallocate の実装、どこを見ればわかるんだ
March 25, 2025 at 12:17 AM
ext4 における fallocate の実装、どこを見ればわかるんだ
fallocate が実際に何をしているのかいまいち分からなくて性能差の解像度が低いな
March 21, 2025 at 9:09 PM
fallocate が実際に何をしているのかいまいち分からなくて性能差の解像度が低いな
fallocate を ext4 で使うメリットはあるのかな
March 21, 2025 at 1:13 AM
fallocate を ext4 で使うメリットはあるのかな
ebpf でトレースした結果、fallocate した時の方がメタデータ (inode) の更新回数が多いという謎な結果になってる
March 20, 2025 at 10:08 PM
ebpf でトレースした結果、fallocate した時の方がメタデータ (inode) の更新回数が多いという謎な結果になってる
💡 Need a dummy file for testing? Create files instantly with `mkfile`
https://syntax.club/profile/andreruffert.com/snap/3moiggkaiks2e
https://syntax.club/profile/andreruffert.com/snap/3moiggkaiks2e
![Syntax highlighted Bash:
# macOS
# Create a file of the specified size
mkfile [-nv] size[b|k|m|g] filename
# Create a 10 MB file
mkfile 10m 10MB.pdf
# Linux equivalent
# Allocate a 10 MB file on disk
fallocate -l 10M 10MB.pdf](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:sdt6u6ybm3ck5vueftpvnxms/bafkreiedrbflwewwygr6lrk3o6rkb5vazydou64wrjg25hfew4iziyckxm)
June 17, 2026 at 1:48 PM
💡 Need a dummy file for testing? Create files instantly with `mkfile`
https://syntax.club/profile/andreruffert.com/snap/3moiggkaiks2e
https://syntax.club/profile/andreruffert.com/snap/3moiggkaiks2e
[PATCH v2 1/1] ext4: add FALLOC_FL_ALLOCATE_RANGE to supported fla ... chuguangqing writes: (Summary) Add FALLOC_FL_ALLOCATE_RANGE to the set of supported fallocate mode flags. This change improves...
Origin | Interest | Match
Origin | Interest | Match
Awakari App
awakari.com
July 16, 2025 at 2:43 AM