LWN.net<p>[$] The state of guest_memfd</p><p>A typical cloud-computing host will share some of its memory with each guest that it runs. The host retains its access to that memory, though, meaning that it can readily dig thro [...]</p><p><a href="https://lwn.net/Articles/1016133/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016133/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
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#lwn
29 messages · 6 participants · 5 messages aujourd’hui
LWN.net<p>[$] The future of ZONE_DEVICE</p><p>Alistair Popple started his session at the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit by proclaiming that ZONE_DEVICE is "the ugly stepchild" of the kernel's [...]</p><p><a href="https://lwn.net/Articles/1016124/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016124/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] Supporting untorn buffered writes</p><p>At last year's Linux Storage, Filesystem, Memory-Management, and BPF Summit (LSFMM+BPF), there was a discussion about atomic writes that was accompanied by patches to support the f [...]</p><p><a href="https://lwn.net/Articles/1016015/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016015/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] A strange BPF error message</p><p>Yonghong Song brought a story about tracking down the cause of a strange verifier error message to the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit. He then pr [...]</p><p><a href="https://lwn.net/Articles/1016105/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016105/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>Security updates for Friday</p><p><a href="https://lwn.net/Articles/1016484/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016484/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] Page allocation for address-space isolation</p><p>Address-space isolation may well be, as Brendan Jackman said at the beginning of his memory-management-track session at the 2025 Linux Storage, Filesystem, Memory-Management, and B [...]</p><p><a href="https://lwn.net/Articles/1016013/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016013/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] Better hugetlb page-table walking</p><p>The kernel must often step through the page tables of one or more processes to carry out various operations. This "page-table walking" tends to be performed by ad-hoc (duplicated) [...]</p><p><a href="https://lwn.net/Articles/1016011/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016011/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>Rust 1.86.0 released</p><p><a href="https://lwn.net/Articles/1016365/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016365/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>Security updates for Thursday</p><p><a href="https://lwn.net/Articles/1016361/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016361/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] LWN.net Weekly Edition for April 3, 2025</p><p>The LWN.net Weekly Edition for April 3, 2025 is available.</p><p><a href="https://lwn.net/Articles/1015512/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1015512/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] Catching up with calibre</p><p>Saying that calibre is ebook-management software undersells the application by a fair margin. Calibre is an open-source Swiss Army knife for ebooks that can be used for everything [...]</p><p><a href="https://lwn.net/Articles/1015226/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1015226/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] An update on GCC BPF support</p><p>José Marchesi and David Faust kicked off the BPF track at the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit with an extra-long session on what they have been do [...]</p><p><a href="https://lwn.net/Articles/1015747/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1015747/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>Thunderbird plans "Thundermail" email and other services</p><p><a href="https://lwn.net/Articles/1016219/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016219/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>Introducing Fedora Project Leader Jef Spaleta</p><p><a href="https://lwn.net/Articles/1016217/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016217/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>PorteuX 2.0 released</p><p><a href="https://lwn.net/Articles/1016216/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016216/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] Approaches to reducing TLB pressure</p><p>The CPU's translation lookaside buffer (TLB) caches the results of virtual-address translations, significantly speeding memory accesses. TLB misses are expensive, so a lot of thou [...]</p><p><a href="https://lwn.net/Articles/1016009/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016009/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>Rockbox 4.0 released</p><p><a href="https://lwn.net/Articles/1016207/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016207/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>Security updates for Wednesday</p><p><a href="https://lwn.net/Articles/1016205/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016205/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>[$] Slab allocator: sheaves and any-context allocations</p><p>The kernel's slab allocator is charged with providing small objects on demand; its performance and reliability are crucial for the functioning of the system as a whole. At the 202 [...]</p><p><a href="https://lwn.net/Articles/1016001/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016001/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
LWN.net<p>Dave Täht RIP</p><p><a href="https://lwn.net/Articles/1016109/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">lwn.net/Articles/1016109/</span><span class="invisible"></span></a> <a href="https://fosstodon.org/tags/LWN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LWN</span></a></p>
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